To add a phone number to Favorites on the AudioCodes C455HD:

1. Double-touch the person's icon to open their profile screen.
2. Select the star icon.
3. When audio informs you that you can add to Favorites, double-touch to activate it.

This answer is automatically generated

Karen Shumate

February 28, 2025

How do you change the voicemail message

Summary of Contents for AudioCodes C455HD

Page 1 User's and Administrator's Manual AudioCodes 400HD IP Phone Series C455HD IP Phone Microsoft Teams Application Version 1.19 ...
Page 2 Customer Support Customer technical support and services are provided by AudioCodes or by an authorized AudioCodes Service Partner. For more information on how to buy technical support for ...
Page 3 Notice C455HD | Users & Administrator's Manual Document Name Device Manager Deployment Guide https://docs.microsoft.com/en-us/MicrosoftTeams/phones-for-teams - iii -...
Page 4: Table Of Contents
Content C455HD | Users & Administrator's Manual Table of Contents Overview Specifications Allowing URLs, Ports (Security) Security Guidelines for Android-based Native Teams Devices Android-Level Security Hardening Google Play Services Running Android in Kiosk Mode Screen Lock AudioCodes Private Key Android Debug Bridge (ADB)
Page 5 Content C455HD | Users & Administrator's Manual Performing a Soft Restore Recovery Mode Locking and Unlocking the Phone Automatic Lock Unlock Teams Application Signing In Multi-Cloud Sign-in Remote Provisioning and Sign-in from Teams Admin Center Getting Acquainted with the Phone Screen...
Page 6 Content C455HD | Users & Administrator's Manual Adjusting Volume Adjusting Ring Volume Adjusting Tones Volume Adjusting Handset Volume Adjusting Speaker Volume Adjusting Headset Volume Playing Incoming Call Ringing through USB Headset Using the Phone as a USB Speaker Viewing and Joining Meetings...
Page 7 Content C455HD | Users & Administrator's Manual Getting the Phone IP Address Installing the APK using SSH Updating Phones using SSH Commands Microsoft Teams Admin Center Collecting Logs Getting Audio Debug Recording Logs Collecting Media Logs (*.blog) from the Phone...
Page 8: Overview
CHAPTER 1 Overview C455HD | Users & Administrator's Manual Overview The AudioCodes C455HD IP phone is a high-end, native Microsoft Teams executive IP phone with a large, color 5” touch screen, integrated Bluetooth and Wi-Fi, and optional connectivity to a color touch screen Expansion Module. Feature highlights: Full duplex speakerphone and headset connectivity ■ ■ Graphical 5” color capacitive touch screen (1280 X 720 resolution) ■ Multi-lingual support Dual GbE support ■ ■ PoE or external power supply USB port for USB headset ■ ■ Applicable to part number C455HD-DBW: ● Integrated Bluetooth and Wi-Fi (contact your local AudioCodes representative for more information about regional availability of Wi-Fi / Bluetooth) ● Optional Expansion Module support with a graphical 5” color capacitive touch screen, 480 X 854 resolution (the Expansion Module is purchased separately) See here for video blogs and blogs about AudioCodes' Teams phones. See here for videos and webinars about AudioCodes' Teams phones. See here marketing material related to all AudioCodes' Teams phones. Specifications The following table summarizes the phone's software specifications. Table 1-1: Software Specifications...
Page 9 CHAPTER 1 Overview C455HD | Users & Administrator's Manual Feature Details ■ RTP/RTCP Packetization (RFC 3550, RFC 3551), SRTP (RFC 3711) Microsoft Authentication (Sign in with user credentials; Sign in using ■ Teams phones PC/Smartphone; Modern Authentication; Phone lock/unlock) feature set ■ Calling (Incoming/Outgoing P2P calls; In-call controls via UI (Mute, hold/resume, transfer, end call); PSTN calls; Visual Voicemail; 911 support Calendar and Presence (roadmap feature) (Calendar Access and ■ Meeting Details; Presence Integration; Exchange Calendar Integration; Contact Picture Integration; Corporate Directory Access) ■ Meetings (roadmap feature) (One-click Join for Meetings; Join Skype for Business meetings; Meeting Call controls [Mute/unmute, hold/resume, hang up, add/remove participant]; Meeting Details. See also here for related Microsoft documentation. Configuration Teams admin center (TAC) ■ and ■ OVOC / Device Manager Management Debugging ...
Page 10 CHAPTER 1 Overview C455HD | Users & Administrator's Manual Feature Details ■ Wired connectivity: Two RJ-45 [Gigabit Ethernet (GbE)] (10/100/1000BaseT ✔ Ethernet) ports: LAN and PC port USB port for USB headset ✔ C455HD with DBW suffix flavor: ● White USB port - host port for USB headset ● Black USB port - default port but can be configured to host port. To configure device / host port: setup_usbport2_mode.sh host (from device to host) setup_usbport2_mode.sh device (from host to device) It can alternatively be configured by setting the configuration file parameter 'management/usbport2/mode' to the value of USB_HOST_MODE/USB_DEVICE_MODE RJ-11 interface ✔ ✔ Survivable Branch Appliance (SBA) Wireless connectivity (applies to PNs TEAMS-C455HD-DBW and ■...
Page 11: Allowing Urls, Ports (Security)
CHAPTER 1 Overview C455HD | Users & Administrator's Manual Feature Details ✔ PoE Class 3: IEEE802.3af (optional) Keys: ■ ✔ VOICE MAIL message hotkey (including LED) 4-way navigation button with OK key ✔ ✔ MENU HOLD ✔ ✔ MUTE (including LED) ✔ TRANSFER VOLUME control key ✔ ✔ HEADSET (including LED) SPEAKER (including LED) ✔ ✔ BACK CONTACTS ✔ ✔ AC key – for future use – currently used as home key Allowing URLs, Ports (Security) This section shows network administrators which URLs/Ports to allow when deploying Teams ...
Page 12: Security Guidelines For Android-Based Native Teams Devices
Reduce the expiration time of the sign-in for devices which are connected remotely (outside the organization's network) versus devices inside the organization's premises. AudioCodes recommends visiting Microsoft's technical pages for more security guidelines and policies for Microsoft Teams adoption: Overview of security and compliance - Microsoft Teams | Microsoft Docs ■ ■ Identity models and authentication for Microsoft Teams - Microsoft Teams | Microsoft Docs ■ Sign in to Microsoft Teams - Microsoft Teams | Microsoft Docs Android-Level Security Hardening Major Android- level system- level developments have been incorporated into AudioCodes' devices to improve security: ■ See Google Play Services on the next page - 5 -...
Page 13: Google Play Services
CHAPTER 1 Overview C455HD | Users & Administrator's Manual See Running Android in Kiosk Mode below ■ ■ See Screen Lock on the next page ■ See AudioCodes Private Key on the next page See Android Debug Bridge (ADB) on the next page ■ ■ See App Signing on the next page See Web Browser on the next page ■ ■ See Remote Configuration Management on the next page See AudioCodes Device Manager Validation on page 8 ■ ■ See Sandboxing on page 8 ■ See Device File System on page 8 See Keystore on page 8 ■ ■ See Device Certificate on page 8 See Data Protection on page 9 ■ ■ See Debugging Interface on page 9 See SSH Access: Reduced File System ■ ■ See Android Security Updates on page 9 Google Play Services Goggle Play services were removed from AudioCodes devices software. Access to any Google ...
Page 14: Screen Lock
AudioCodes Private Key The system software on AudioCodes devices is signed with AudioCodes' private key. Users can replace the complete software only with new software that is also signed by AudioCodes' private key. This prevents users from replacing the complete over-the-air (OTA) package of the device with any new system software, unless the software is fully signed by AudioCodes. Android Debug Bridge (ADB) The device does not allow access to ADB.
Page 15: Audiocodes Device Manager Validation
CHAPTER 1 Overview C455HD | Users & Administrator's Manual AudioCodes Device Manager (part of AudioCodes' OVOC suite) over HTTPS. ■ ■ Debugging interface over SSH. Note that SSH must be disabled by default and enabled only per specific case for debugging purposes only. AudioCodes Device Manager Validation The AudioCodes Native Teams devices validate the AudioCodes Device Manager identity using a known trusted certificate: ■ The device is shipped with known trusted certificate installed. See AudioCodes Root CA Certificate on the next page. ■ For the initial connection, the AudioCodes Device Manager accesses devices using a known trusted certificate. Once a successful secured connection has been established between the device and the ■ Device Manager, the user can replace the trusted certificate on the Device Manager and on the phone, and re-establish the connection leveraging any Private Trusted Certificate. Sandboxing AudioCodes devices use Android Application Sandbox so that each application can access its own data and is isolated from other applications. This prevents a malicious app from accessing the code or the data of other applications in the system. Device File System The AudioCodes device's file system is encrypted on 455HDdevices. Customers may enforce a policy of device encryption via Microsoft's cloud-based Intune service. Keystore With AudioCodes devices, the certificate keys are encrypted on the device file system.
Page 16: Data Protection
CHAPTER 1 Overview C455HD | Users & Administrator's Manual Trusted certificates are provisioned by parameter security/ca_certificate/[0-4]/ Data Protection AudioCodes devices run Android which has integral procedures for protecting and securing user data. Debugging Interface ■ AudioCodes devices leverage SSH as a debugging interface. AudioCodes recommends that customers disable SSH on devices via AudioCodes' Device ■ Manager (OVOC). AudioCodes recommends changing the Admin password from the default, via the Teams ■ Admin Center or AudioCodes' Device Manager (OVOC). ■ When a device - or multiple devices - needs to be debugged, users can enable SSH on it / them, access SSH with the new Admin password for the debugging phase, and disable SSH once debugging is finished. SSH is by default disabled and can be enabled with Administrator permissions in the phone screen (Device Administration >...
Page 17 CHAPTER 1 Overview C455HD | Users & Administrator's Manual -----BEGIN CERTIFICATE----- MIIDMTCCAhmgAwIBAgIBATANBgkqhkiG9w0BAQsFADAfMQwwCgYDVQQKE wNBQ0wx DzANBgNVBAMTBlJvb3RDQTAeFw0wMDAxMDEwMDAwMDBaFw0zMDAxMD EwMDAwMDBa MB8xDDAKBgNVBAoTA0FDTDEPMA0GA1UEAxMGUm9vdENBMIIBIjANBgkqh kiG9w0B AQEFAAOCAQ8AMIIBCgKCAQEA6GK495KUCXAm/UE17G4/cjnZN4LNaxYEYz bfZL0a EhgSKYt/LQ+iUcDhojsneusNgrcGkpwKklKsGsvGWmSRNULV01CW+TX2VJN7 3+hh V0uzhyOIYAUhbDaoqNM6Kp5b7sJ1ew4Ig9kfd/ma9Czl5koESLlw/inLj/r+rD96 - 10 -...
Page 18 CHAPTER 1 Overview C455HD | Users & Administrator's Manual mUcPElWrKspv7Qy4I14fsK/yMArixRopTL1munVVPpSFM9Jh8IY3JHyr5CQJXKK EhGAJsnHaRqsR2Su3X/WtslgEF+cvP34pxhlhFL29nMfnaFATSS3rgGaFlSvl1ZS esLMqkWjp9cqGYrvt7K61sYnvMMb+o/KbWqVokXb+Fr7bwIDAQABo3gwdjAMB HRMEBTADAQH/MB0GA1UdDgQWBBQDXySn9hz15lDraZ+iXddZGReB+zBHB gNVHSME QDA+gBQDXySn9hz15lDraZ+iXddZGReB+6EjpCEwHzEMMAoGA1UEChMDQU NMMQ8w DQYDVQQDEwZSb290Q0GCAQEwDQYJKoZIhvcNAQELBQADggEBAI0rUywo mmWWJnH3 JOfKiS3+VnX5hJITZymvWanMXUz/6FonHccPXEBYTrUYwhiWx3dwELAFXDFK kxMp 0KKWZ4F39cAOLRjqhzya+xUeeJ9HQZCXYAJ6XgvTfN2BtyZk9Ma8WG+H1hNv vTZY QLbWsjQdu4eFniEufeYDke1jQ6800LwMlFlc59hMQCeJTenRx4HdJbJV86k1gBU A7fJT1ePrRnXNDRz6QtADWoX3OmN7Meqen/roTwvLpEP22nYwvB28dq3JetlQ XC4gwI/o8K2wo3pySLU9Y/vanxXCr0/en5l3RDz1YpYWmQwHA8jJIu8rxdhr+VNQ Zv6R/Ys= -----END CERTIFICATE---- - 11 -...
Page 19: Setting Up The Phone
CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Setting up the Phone The instructions following show how to set up the phone. Unpacking When unpacking, make sure the items listed in the phone's Quick Guide are present and ...
Page 20: Device Description
CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Device Description Use the following graphics to identify and familiarize yourself with the device's hardware functions.
Page 21 CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Item # Label/Name Description ■ Red: Answered call TFT touch screen Thin Film Transistor touch screen, a type of LCD (Liquid Crystal Display) interactive screen which displays calling information and lets you configure phone features by touching the glass. Navigation Control Press the button's upper rim to scroll up menus/items. ■ / OK ■ Press the button's lower rim to scroll down. Press the button's left or right rim to move the cursor ■ left or right (when editing a contact number for example). ■ Press OK to select a menu/item/option. Voicemail Retrieves voicemail messages. CONTACTS Accesses the People screen. MENU Accesses the Settings screen. ...
Page 22 CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Item # Label/Name Description 'Back' key Returns you to the previous screen. - 15 -...
Page 23: Rear View
CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Rear View The ports located on the rear of the phone are described in the table. Figure 2-2: Rear View Table 2-2: Rear View Description Label Description Handset jack, i.e., port RJ-9, to connect the handset. RJ-45 port to connect to the Ethernet LAN cable for the LAN connection (uplink - 10/100/1000 Mbps). If you're using Power over Ethernet (PoE), power to the phone is supplied from the Ethernet cable (draws power from either a spare line or a signal line). RJ-45 port to connect the phone to a PC (10/100/1000 Mbps downlink). 12V DC power jack that connects to the AC power adapter. Headset jack, i.e., RJ-9 port that connects to an external headset. - 16 -...
Page 24: Cabling
CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Cabling See the phone's Quick Guide shipped with the device and also available from AudioCodes for detailed information on how to cable the phone. Mounting the Phone The phone can be mounted on a: ■ Desk (see Desktop Mounting below) Wall (see Wall Mounting below) ■ See the phone's Quick Guide shipped with the device and also available from AudioCodes for detailed information on how to mount the phone. See also here f or a clip showing the principle of how to mount an AudioCodes IP phone. The principle is the same across all AudioCodes IP phones. Desktop Mounting The following instructions show how to mount the phone on a flat surface like a desk. ➢ To mount the phone on a flat surface like a desk: Off-hook the handset (if on-hook) and place the phone upside down, i.e., base-up, on your ...
Page 25: Installing The Expansion Module (Sidecar)
CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual If the phone model you have has an Expansion Module attached, wall mounting isn't supported. ➢ To mount the phone on a wall: Attach the stand of the phone for the purpose of a wall mounting: Detach the base. Attach it again as you did for a desktop mounting (see Desktop Mounting on the previous page) only now make sure that it's flatly aligned to lie flush against the wall, i.e., slide the inner rails of the phone stand onto the phone base's inner notches. Connect the AC power adapter, LAN and PC/laptop cords.
Page 26: Before Using Audiocodes Devices
CHAPTER 2 Setting up the Phone C455HD | Users & Administrator's Manual Before Using AudioCodes Devices AudioCodes recommends frequently cleaning devices' screens especially screens on devices in common use areas such as conference rooms and lobbies. ➢ To clean a device's screen: Disconnect all cables. Spray onto a clean, dry, microfiber duster a medicinal isopropyl alcohol and water solution of 70:30. Don't oversaturate the duster. If it's wet, squeeze it out. Lightly wipe the screen of the device. Wait for the screen to dry before reconnecting cables. - 19 -...
Page 27: Starting Up
CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Starting up Here's how to start up the phone. ➢ To start up: Connect the phone to the network (or reset it); the language selection screen is displayed by default. Select the language of your choice and then configure device settings to suit specific requirements. It will be necessary to repeat this only if the phone is restored to default settings. Configuring Device Settings The section familiarizes you with the phone’s settings. Phones are delivered to customers ...
Page 28 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual View the settings under 'User'. Select a setting to open it. Use the table following as reference. [To view settings related to the network administrator, scroll down and open 'Device administration']. Table 3-1: Device Settings Setting Description User Display Opens the ‘Display’ screen [Brightness level]. The phone's screen supports different brightness levels. Choose the level that suits your requirements. ■ Sleep ■ Screen saver - 21 -...
Page 29 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description ■ Font size Sound Allows you to customize phone volume for a friendlier user experience. Ring volume at n% Date & time Date and time are automatically retrieved from the deployed Network Time Protocol (NTP) server. - 22 -...
Page 30 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description Use 24-hour format [Allows you to select the Time format] Also supported is a simplified version of NTP called Simple Network Time Protocol (SNTP). Both can be used to synchronize device clocks. SNTP is typically used if full implementation of NTP is not required. Wi-Fi The phone can connect to an Access Point via Wi-Fi. See the phone's Quick Guide for detailed information on setting up Wi-Fi. See also Configuring Wi-Fi on page 34 in this document for information about configuring the feature. Accessibility Allows making the screen reader-friendlier. See also Enabling Google Talkback on page 53. Bluetooth Hands free profile where the phone is able to connect to Bluetooth headset or speaker. See the phone's Quick Guide for detailed information on setting up Bluetooth. Power Saving Allows users to contribute to power saving in the enterprise. Enable power saving Start time [The device consumes minimal energy before the user arrives at the office] - 23 -...
Page 31 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description End time [The device consumes minimal energy after the user leaves the office] Debugging Enables users to reboot the device. Log in as Administrator for more debugging settings to be available. Security Helps secure the enterprise telephony network against breaches. Screen lock [The phone automatically locks after a configured period to secure it against unwanted use. If left unattended for 10 minutes (default), it automatically locks and is inaccessible to anyone who doesn't know its lock code.] Make passwords available Touch screen Allows users to disable the phone’s touch screen. Languages Allows users to customize inputting to suit personal requirements. & input - 24 -...
Page 32 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description About Enables users to determine device information. [Android 7.1.2] To determine the device’s IP address, select the ‘Status’ option. To get information about the version, select ‘Version info’. - 25 -...
Page 33 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description To get information about the Android version, select ‘Android version’. Device administration Device Allows the user to log in as Administrator, necessary for some of the administration debugging options. It is password protected. Default password: 1234 (or 1111 in early versions). After logging in as an Administrator, the user can log out | change password. Select Login and then in the Login screen that opens, select the 'Enter password' field and use the virtual keyboard to enter the password (1234 or 1111). Note that the virtual keyboard pops up for all ‘Settings’ fields to allow inputting characters and / or numbers. Two virtual keyboard types can be displayed: Numeric o r QWERTY. - 26 -...
Page 34 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description ● The phone support a strong password check in order to log in as Administrator. The feature strengthens security. Note that the default password: ✔ must be changed before accessing the device via ✔...
Page 35 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description 'Device administration'. Modify network Enables the Admin user to determine network information and to modify network settings. IP Address [Read Only] IP Settings [DHCP or Static IP] Network state [Read Only] Enable PC port Enable PC port mirror Proxy 802.1x Settings - 28 -...
Page 36 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description VLAN Settings. Allows you to configure the VLAN mode Manual, CDP only or LLDP only. Note that LLDP switch information is retrieved (for location purposes) when parameter network/lan/lldp/enabled=1 (even when VLAN is retrieved from CDP or VLAN is disabled or VLAN is Manual). In versions prior to 1.19, if network VLAN mode ‘network/lan/vlan/mode’ was set to LLDP, the phone retrieved the VLAN and LLDP switch information (for location purposes) from LLDP. Proxy The phone can be configured with an HTTP Proxy server by an Admin user in two ways: ■ Manually. T he Admin user can use this method to configure HTTP proxy server parameters through the Teams application: Log in as Administrator and select Modify network. Select the Proxy option and then configure the proxy host name and port: Over DHCP with Option 252. It's recommended that the Admin ■ user uses this method when provisioning multiple phones. Option ...
Page 37 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description The proxy setting is provided in a Proxy Auto-Configuration (PAC) file that contains a set of rules coded in JavaScript which allows a web browser to determine whether to send web traffic directly to the Internet or to be sent via a proxy server. PAC files control how the phone handles HTTP, HTTPS and FTP traffic. Example of a basic PAC file: function FindProxyForURL(url, host) return "PROXY 10.13.2.40:3128"; If the enterprise features a proxy server that requires user authentication, the network administrator can use the PAC file and DHCP Option 252 to configure it. Alternatively, the administrator can configure it using the following parameters: http_client/fwd_proxy/ip=0.0.0.0 http_client/fwd_proxy/password= http_client/fwd_proxy/port=8080 http_client/fwd_proxy/username= 802.1x Settings 802.1X Authentication is the IEEE Standard for Port-based Network Access Control (PNAC). See https://1.ieee802.org/security/802-1x/ for more information. To configure an 802.1X Authentication method:...
Page 38 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description From the ‘Modify Network’ screen (as an Admin), access the 802.1x Settings screen. From the 'EAP method' drop-down, select the method: MD5 or TLS (for example). Enter this information: Identity: User ID ✔ ✔ Password ✔ root certificate (not required for every method) device certificate (not required for every method) ✔ Select the Save softkey The 802.1x settings are not only available via the phone screen, they're also supported in the device Configuration File, enabling network administrator's to perform pre-staging configuration for 802.1x. The 802.1x settings available in the Configuration File are: ■ Enable/Disable EAP method ■ ■ Identity Password ■ VLAN Settings Select the menu option VLAN Settings. ...
Page 39 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description Select VLAN Discovery mode. Cisco Discovery Protocol (CDP) is a Cisco proprietary Data Link ■ Layer protocol ■ Link Layer Discovery Protocol (LLDP) is a standard, layer two discovery protocol Select the mode you require and then select OK. If you select Manual configuration, this screen opens: Select VLAN Interval. - 32 -...
Page 40 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description The 'VLAN interval' refers to CDP/LLDP advertisements' periodic interval. D efault: 30 seconds. You can increase or decrease the intervals between the CDP/LLDP packets that are sent, based on network traffic and topology. Debugging Allows the Admin user to perform debugging for troubleshooting purposes. Available after logging in as Admin. Log settings Remote Logging (see under Remote Logging (Syslog) on page 119 for more information) Diagnostic Data (see under Getting Diagnostics on page 120 for more information) Reset configuration Restart Teams app Company portal login Debug Recording (for Media/DSP debugging) (see under Remote - 33 -...
Page 41: Configuring Wi-Fi
CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Setting Description Logging (Syslog) on page 119 for more information) Factory data reset (the equivalent of restore to defaults; including logout and device reboot) Screen Capture. By default, this setting is enabled. If it's disabled, the phone won't allow its screens to be captured. Configuring Wi-Fi [Applies to devices whose PN indicates DBW ] Network administrators can configure Wi- Fi ...
Page 42: Manually Connecting To A Wi-Fi Network
CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Select the Wi-Fi network you want and enter the password. View the network you selected 'Connected'. Manually Connecting to a Wi-Fi Network ➢ To manually connect to a Wi-Fi network: Make sure to first disconnect your Ethernet cable. If it's connected, the device will not be able to connect to a Wi-Fi network.
Page 43 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual From the 'Security' drop-down, select one of the following security key strengths (encryption methods): Optionally meter the selected network. Expand Advanced Options. Leave the setting at its default value of Detect automatically if you don't want to meter the network. Select a Metered option to meter it. 'Proxy' and 'DHCP' shown in the figures below will automatically be configured by the network. - 36 -...
Page 44 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Enabling the setting Turn on Wi-Fi automaticallyshown in the 'Wi-Fi preference' shown below allows the device to automatically connect in the future to the highest signal-quality network remembered by the device.
Page 45: Restoring The Phone To Default Settings
CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Wi-Fi Setting Description network/wireless/adavanced_ Defines t he URL of the PAC file. options/proxy/auto_config/pac_url network/wireless/adavanced_ Defines t he list of IP addresses that will be options/proxy/manual/exclusion_list blocked. network/wireless/adavanced_ Defines t he name of the proxy host. options/proxy/manual/proxy_ hostname network/wireless/adavanced_ Defines t he proxy port. options/proxy/manual/proxy_port network/wireless/anon_identity Defines t he anonymous wireless users who won’t be seen. network/wireless/ca_cert Defines ...
Page 46: Performing A Hard Restore
CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Performing a Hard Restore below ■ ■ Performing a Soft Restore below Performing a Hard Restore You can either: ■ perform a hard restore while the phone is up and running (see below) ■ restore the phone’s settings to their defaults when the phone is not connected (see below) ➢ To perform a hard restore while the phone is up and running: Long-press the HOLD key on the phone (more than 15 seconds); the screen shown below is displayed and the device performs a restore to default factory settings. After the restore, the phone automatically reboots and goes through the Wizard and sign- in process. Select OK; the sign-in screen is displayed (see Signing In on page 42 for more information).
Page 47: Recovery Mode
CHAPTER 3 Starting up C455HD | Users & Administrator's Manual Select the Factory data reset option; the device performs a restore to default factory settings. Recovery Mode If a phone goes into recovery mode, you can boot it using its hard keys as shown in Performing a Hard Restore on the previous page. Locking and Unlocking the Phone As a security precaution, the phone can be locked and unlocked. The feature includes: ■ Unlock (see Unlock below) Automatic lock (Automatic Lock below) ■ Automatic Lock Users can lock their phones as a security precaution. Configure the phone with any of the lock options before attempting to lock it. If an option isn't configured, the action won't function. ➢ To lock the phone: ■ Press the back key on the phone for at least three seconds for the device to automatically lock. ...
Page 48 CHAPTER 3 Starting up C455HD | Users & Administrator's Manual View the digits displayed as you type: When the phone detects the unlock code, it unlocks. - 41 -...
Page 49: Teams Application
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Teams Application The following describes functions related to the phone’s Microsoft Teams application. Signing In Using TeamsIPPhonePolicy, network administrators can create the following users who can then sign in to the phone: ● UserSignin: All features are available, i.e., calls, meetings and voicemail ●...
Page 50 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual the actual geographical location, therefore the displayed time might be incorrect in some cases. For example, if the given time offset is GMT-5 and the phone is located in Mexico, the phone will get the time (and the DST setting) from central time and not from Mexico because in GMT-5 there is also Central Daylight Time. If the internet connectivity check fails, a ‘No Internet Access’ warning pops up on the phone screen. Figure 4-1: Internet Connectivity Check - No Internet Access This can point to a problem that is preventing the phone from fully functioning in a Teams environment. The user can ignore the message if the Teams application is fully functioning, or can report a problem if the Teams application is not fully functioning. ➢ To sign in: Connect the device to the network; this screen is then displayed: Open your browser and point it to https://microsoft.com/devicelogin as instructed in the preceding screen. - 43 -...
Page 51 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Enter the code and then click Next. Click the account. Enter your password (it's the same password as the Windows password on your PC) and then click Sign in. - 44 -...
Page 52 (the user first enters the default password and is then prompted to modify it to a more complete password) or via bulk configuration of multiple devices using Microsoft's TAC or AudioCodes' Device Manager ●...
Page 53: Multi-Cloud Sign-In
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Figure 4-2: Sign-in from PC / Smart Phone In the browser on your PC or smart phone, enter the URL indicated in the ◆ preceding screen and then in the phone’s Web interface that opens, perform sign- in (as noted previously, this option is recommended if using MFA). LLDP- MED (Link Layer Discovery Protocol – Media Endpoint Discovery) is a standard link layer protocol used by network devices to advertise their identity, capabilities, and neighbors on a local area network based on IEEE802 technology, principally wired Ethernet.
Page 54: Remote Provisioning And Sign-In From Teams Admin Center
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Remote Provisioning and Sign-in from Teams Admin Center Network administrators can remotely provision and sign in to a Teams device. To provision a device remotely, the admin needs to upload the MAC IDs of the devices being p rovisioned and create a verification code. The entire process can be completed remotely from the Teams ...
Page 55 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Upload a file to add a device MAC address From the Awaiting Activation tab, select Upload MAC IDs. Download the file template. Enter the MAC ID and location, and then save the file. Select the file, and then select Upload. ➢ Step 2: Generate a verification code You need to generate a verification code for the devices. The verification code is generated in bulk or at the device level and is valid for 24 hours. From the Awaiting Activation tab, select an existing MAC ID. A password is created for the MAC address and is shown in the Verification Code column. You'll need to provide the list of MAC IDs and verification codes to the field technicians. You can export the detail directly in a file and share the file with the technician who is doing the actual ...
Page 56 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual The technician is then expected to enter the device-specific Verification code that was provided in the Teams admin center on the phone’s user interface. Once the device is provisioned ...
Page 57 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual When the tenant admin is signing in from Teams Admin Center, the user interface on the device is blocked to prevent other actions on the phone. - 50 -...
Page 58: Getting Acquainted With The Phone Screen
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Getting Acquainted with the Phone Screen The following gets you acquainted with the phone’s user interface. The figure below shows the phone's home screen, aka the phone's idle screen. The following figure shows the phone's Calls screen. The following table describes the phone's home screen. - 51 -...
Page 59 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Table 4-1: Calls Screen Item Description The phone menu. Select it to open the menu shown in the figure following this table. Calls Select the tab to open the Calls screen. The screen shown in the figure preceding this table opens. People Select the tab to open the People, shown under Using the People Screen on page 63 opens. Allows you to easily connect and collaborate with teammates, colleagues, friends and family. Through this screen, you can see all your contacts and create and manage contact groups to organize your contacts. The screen provides a simple user experience and aligns with the contacts on the Teams desktop client. If a contact has multiple numbers, the phone screen allows the user to select from a drop-down menu the intended contact method. Calendar Select to open the Calendar screen, shown under Setting up a Meeting on page 62 opens. Voicemail Select the tab to open the Voicemail screen, shown under Accessing Voicemail on page 63 opens. The following figure shows the user's presence status screen. Use this table as reference. Table 4-2: Menu Item Descriptions...
Page 60: Enabling Google Talkback
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Item Description Connect a device See Connecting a Device for more information. Hot desk See Hot Desking on page 55 for more information. Settings See Configuring Teams Application Settings on page 59 for more information. Sign Out See Signing Out on page 64 for more information. Enabling Google Talkback AudioCodes’ Native Teams Android devices feature Google TalkBack, an accessibility service that allows blind and low-vision users to interact with their devices by giving them spoken feedback so they can use their devices without looking at the screen. The feature improves the experience of these users. ➢ To enable the feature: Open the Accessibility screen (Settings > Device settings > Accessibility). Select the TalkBack option shown in the preceding figure. Click OK to switch the feature on as shown in the preceding figures. Listen to the audio tutorial that begins playing. The tutorial explains how to interact with the device. ●...
Page 61: Opting In Or Out Of Call Queues
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Select the phone icon; audio informs you that you can activate the person's profile. Double- touch the icon; the person's profile screen opens displaying their name, position, email, hyperlinked work phone number and hyperlinked mobile phone number. Select the star icon; audio informs you that you can add to Favorites; double-touch to activate it. Opting in or out of Call Queues Call queue agents can opt out of call queues or opt in based on settings a vailable on the Teams phones. Setting Status You can set a status message to add more substance to your presence status. For example, a status message such as 'Working from home' adds more substance to the presence status of 'Available'. ➢ To set presence status: In the home screen, select the user (avatar) picture. Select Set status message. - 54 -...
Page 62: Hot Desking
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Select the field under 'Set status message' and in the Virtual Keypad that pops up, type in the message you want to show other people, for example, 'Working from home'. The text you type in will replace 'Set status message' in the screen shown in the preceding figure. Optionally, switch on 'Show when people message me'. When people message or @mention you, they'll view the status message you set. Select 'Clear after' and choose when you want the message to stop displaying. Options are: ● Never clear ● 1 hour ● 4 hours ● Today ● This week ● Custom (set a date and time in the calendar that pops up) Hot Desking The hot desk feature allows a user to sign in to a phone that is already signed in to by another user without signing out the original user to whom the phone was assigned for primary use. Any phone in the enterprise network that is enabled with this feature allows any user in the enterprise to temporarily sign into it, make calls, attend meetings and access their calendar and call log. After finishing using these phone functions, the user can sign out to end their hot desk session; call logs and history will automatically be removed from the device. ➢ To set up a phone as a shared device for hot desking: Select the user's photo or avatar picture, and then from the menu, select the Hot desk...
Page 63: Changing Presence Status
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Figure 4-3: Hot desk Touch t he field 'Email, phone or username'. Figure 4-4: Email, phone or username Use the Virtual Keyboard to type in your email, phone or user name and then select Done; the phone is enabled for hot desk. Changing Presence Status You can assign a presence status to control whether you want people to contact you or not. By default, your status is based on your Microsoft Teams server. ● After n minutes (configured in the Teams server by your administrator), presence status automatically changes to ‘Inactive’.
Page 64: Power Saving
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Table 4-3: Presence Statuses Presence Icon Description Status Available You're online and available for other contacts to call. Busy You’re busy and don’t want to be interrupted. Do not You don’t want to be disturbed. Stops the phone from ringing disturb when others call you. If DnD is activated, callers hear a tone indicating that your phone is busy; the call is blocked and your phone's screen indicates 'Missed Calls'. Be Right You'll be away briefly and you'll return shortly. Back Away You want to hide your status and appear to others you're currently away. Offline You're going on vacation (for example). Reset Resets the status. status Power Saving The phone’s Message Waiting Indicator (MWI) shuts down during off hours. During off hours, ...
Page 65: Enabling Voicemail Support On Cap Users
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual ● By default, the feature is disabled. ● The feature is based on off work hours and sleep timeout. The Configuration File parameters below also support the feature. They can be synchronized with the settings in the phone screen. ● general/power_saving (Used to enable or disable power saving) (Default: 0) ● office_hours/end ● office_hours/start Enabling Voicemail Support on CAP Users The instructions here show how to enable voicemail on common area phone users. Voicemail ...
Page 66: Configuring Teams Application Settings
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Configuring Teams Application Settings The following describes the Teams application's settings. In the home screen, select the user picture / avatar. Alternatively, in the Calls screen (or People screen, Calendar screen or ...
Page 67 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Table 4-4: Idle Screen Description Item Description Dark Theme Dark Theme can be enabled to suit user preference. To enable Dark Theme: Drag the ‘Dark Theme’ setting slider to the ‘on’ position; the fol- lowing prompt is displayed: Choose Restart and then verify after the Teams application restarts that all screens (Teams application and Device Settings) are dark themed: Profile Opens the user's email address and photo / avatar picture. Calling Opens the Calls screen. - 60 -...
Page 68 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Item Description Incoming Calls ■ Call forwarding. Enables automatically redirecting an incoming call to another destination. ■ Forward to. Only displayed if the previous setting is enabled. Defines the destination to which to forward incoming calls.
Page 69: Setting Up A Meeting
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Item Description Sign out Lets you sign out of the phone application as one user and optionally sign in again as another user. See Signing Out on page 64 for detailed information. Device Settings Opens the [Device] Settings screen. See Configuring Device Settings on page 20 for detailed information. Setting up a Meeting From the phone's home screen, select Calendar. You can join calendered meetings and / or you can select to add a new event to the calendar. - 62 -...
Page 70: Using The People Screen
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Using the People Screen The People screen allows users to easily connect and collaborate with teammates, colleagues, friends and family. Through the screen, users can see all their contacts and create and manage contact groups to organize their contacts. The screen provides a simple user experience and aligns with the contacts on the Teams desktop client. In addition to accessing the People screen from the menu, the screen can also be accessed from the hard CONTACTS button on the phone. If a user creates a contact within Microsoft Outlook, their information appears under the People app on the phone screen. Contacts in Microsoft Outlook are available in read-only mode.
Page 71: Using Audio Devices
CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Using Audio Devices Use one of the following audio devices on the phone for speaking and listening: Handset: To make a call or answer a call, lift the handset off the cradle. ■ ■ Speaker (hands-free mode) ● To activate it, press the speaker key during a call or when making a call. ● To deactivate it, press the speaker key again. Headset (hands-free mode). When talking on the phone, you can relay audio to a ■ connected headset. ● To enable it, press the headset key. ● To disable it, press it again. You can easily change audio device during a call. To change from speaker/headset to handset: Activate speaker/headset and pick up the ■ handset; the speaker/headset is automatically disabled. To change from handset to speaker/headset: Off-hook the handset and press the ...
Page 72 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual ➢ To sign out: Under Settings, navigate to and select the Sign out option. Alternatively, in the Calls screen (or People screen, Calendar screen or Voicemail screen), select the phone menu , select the Settings option. After selecting the Sign out option, you're prompted 'Are you sure you want to sign out? Select OK; you're signed out and returned to the Sign in screen.
Page 73 CHAPTER 4 Teams Application C455HD | Users & Administrator's Manual Network administrators can alternatively sign out from devices using Microsoft Teams admin center (TAC). Network administrators can also remotely sign in and provision devices from Microsoft's TAC. - 66 -...
Page 74: Performing Teams Call Operations
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Performing Teams Call Operations The following documentation shows how to perform basic operations with the phone. Making a Call Calls can be made in multiple ways, for example, you can press the digit keys on the phone’s dial pad to enter the phone number or URL. Alternatively, select a call listed in the Calls screen, and then touch . Touching in the Calls screen allows you to make a call by entering the name of a contact. ● You need to touch the ‘To: Search for people' field to launch the soft keyboard.
Page 75: Microsoft Lightweight Calling Experience
Press the speaker key or lift the handset and then touch the ‘Place call’ field. Enter a URL address. To delete (from right to left), touch the clear key. Microsoft Lightweight Calling Experience AudioCodes’ phones feature a simplified look and feel for incoming and outgoing calls, improving phone performance. The feature is enabled by default. ➢ To disable the feature: ■...
Page 76 CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual ➢ To dial the service from the locked idle screen either: Select the EMERGENCY softkey shown in the preceding figure of the locked idle screen and ■ then enter the emergency number. -OR- Dial from the locked idle screen without needing to use the EMERGENCY key: ■ Dial 911. Activate the speaker button on the phone. View the ‘Emergency call’ screen displaying the dialed emergency number. - 69 -...
Page 77: Answering Calls
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual When the phone detects that 911 was requested, it automatically dials that number. Answering Calls The phone indicates an incoming call by ringing and displaying Caller X is calling you. The LED located in the upper right corner of the phone flashes red, alerting you to the incoming call. ➢ To answer: ■ Pick up the handset -OR - activate the headset key on the phone (make sure the headset is connected to the phone) -OR- activate the speaker key on the phone -OR- select the Accept softkey (the speaker is automatically activated). Ending an Established Call You can end an established call in a few ways. ➢ To end an established call: Return the handset to the phone cradle if it was used to take the call -or- activate the ■...
Page 78: Managing Teams Meetings
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual ➢ To park a call: Put the call on hold and park it; you’ll receive a unique code from the Teams application. Communicate the code to another user who can then pick up the call on their device. The user on the other device selects the call park i con displayed in their device’s Calls screen. The user on the other device enters the code communicated to them and then selects the Pick up button to pick up the call. Managing Teams Meetings Multi- party conference meetings based on the Teams server (remote conference) can be ...
Page 79 CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Touch NEXT. Touch Add participants. Touch the ‘To’ field and then use the soft keyboard to enter the first letter of the name of the participant to add. If you're searching for Alex (for example), touch the letter A on the soft keyboard, then l, etc.; the name you’re searching for will be promoted to the top of the list of Corporate Directory entries displayed. - 72 -...
Page 80: Using Live Captions
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual The feature lets you quickly and easily navigate to any employee listed in the Corporate Directory. Using Live Captions The phone can detect what's said in a meeting, group call or 1:1 call, and presents the text on the screen in real-time (live) captions. ● Captions are currently only available in English (US). ● Captions are currently unavailable for phones within government clouds. For more information, see here. - 73 -...
Page 81: Raising A Hand During A Meeting
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Raising a Hand During a Meeting During a meeting, you can raise a virtual hand from your phone to let people know you want to contribute without interrupting the conversation. Everyone in the meeting will see that you've got your hand up. For more information, see here. Hiding Names and Meeting Titles for Individual Devices Names and meeting titles can be hidden for individual devices. ➢ To hide names and meeting titles per device: Access the Meetings screen (More > Settings > Meetings) (the figure is for illustrative ...
Page 82: Viewing And Playing Voicemail Messages
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Viewing and Playing Voicemail Messages If you hear a stutter dial tone when you pick up the handset, new messages are in your ...
Page 83: Adjusting Ring Volume
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Adjusting Ring Volume The volume of the phone's ring alerting you to an incoming call can be adjusted to suit personal preference. ➢ To adjust ring volume: When the phone is in idle state, select the VOL or VOL key on the phone. After adjusting, the volume bar disappears from the screen. Adjusting Tones Volume The phone's tones, including dial tone, ring-back tone and all other call progress tones, can be adjusted to suit personal preference. ➢ To adjust tones volume: Off-hook the phone (using handset, speaker or headset). Select the VOL or VOL key to adjust the volume. After adjusting, the volume bar disappears from the screen.
Page 84: Playing Incoming Call Ringing Through Usb Headset
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual ➢ To adjust the headset volume: During a call, activate the headset key on the phone. Press the VOL or VOL key; the volume bar is displayed on the screen. Playing Incoming Call Ringing through USB Headset The phone features the capability to ring via a USB headset in addition to via the phone ...
Page 85: Better Together Over Bluetooth
CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual ➢ To view the details of a meeting: Scroll down if necessary to the meeting whose details you want to view and select it. Select See details and view in the right pane the details of the meeting. ➢ To join a meeting: ■ In the meeting you want to join, select the See details link and then select Join online meeting. Better Together over Bluetooth Read here about how to configure Better Together over Bluetooth with support for: ■ Pairing with the Teams PC Client ...
Page 86 CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Install Teams PC Client on the PC. Sign in to the Teams PC Client with your account (it's necessary to sign in with the same accounts to both the Teams PC Client and to the device). ➢ To set up Bluetooth on the device side: Sign in to the Teams application with your account (it's necessary to sign in with the same accounts to both the Teams PC Client and to the device). Go to the hamburger menu on the device and click Manage devices. View the displayed available device to connect to. - 79 -...
Page 87 CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Pair the device with your PC. View on your PC a notification it gets to accept the connection: Accept the notification from PC. Check the device and make sure pairing was successful: When pairing the phone with the PC Client, the PC Client presents the following request for approval: - 80 -...
Page 88: Adding A Speed Dial
C455HD | Users & Administrator's Manual Once connected, the phone will be presented as a default Teams PC Client Audio device: Adding a Speed Dial ● Applies only to the C455HD phone with Expansion Module (sidecar). ● The feature expands the phone’s functional capabilities. ● Users can configure speed dials in the sidecar’s BLFs to speed dial frequently- used contacts with the press of a button, determine contacts’...
Page 89 CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual Add it from the C455HD phone using one of the following options: ■ Via the Calls > Recent tab. Select a user and then select the ‘star’ icon to add them to the speed dial list: Via the People tab using + > Add from Directory and then add the users to the speed dial. - 82 -...
Page 90 CHAPTER 5 Performing Teams Call Operations C455HD | Users & Administrator's Manual The sidecar displays the user’s speed dial list. The list is synchronized on all devices under the same user account. The order on the sidecar corresponds to the order of the speed dial list.
Page 91: Performing Administrator-Related Operations
➢ To set up DHCP Option 160, use this syntax: ● <protocol>://<server IP address or host name>/<firmware file name>;<configuration file name> ● <protocol>://<server IP address or host name> ● <protocol>://<server IP address or host name>/<firmware file name> ● <protocol>://<server IP address or host name>/;<configuration file name> Where <protocol> can be "ftp", "tftp", "http" or "https" ➢ To set up AudioCodes' HTTPS Redirect Server, use this syntax: ● <protocol>://<server IP address or host name> ● <protocol>://<server IP address or host name>/<firmware file name> ● <protocol>://<server IP address or host name>/<firmware file name>;<configuration file name> ● <protocol>://<server IP address or host name>/;<configuration file name> - 84 -...
Page 92: Setting Up An E911 Emergency Location Using Tac
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual The Redirect Server's default URL is: provisioning/redirect_server_url=https://redirect.audiocodes.com It can be reconfigured if required. Setting up an E911 Emergency Location using TAC An E911 emergency location can be set up using the Microsoft Teams admin center. ➢ To set up an E911 emergency location: In the TAC, go to Locations and in the 'Emergency addresses' page, set a new location by ...
Page 93 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual After the location has been set, click on the location and add a place (building, etc.). Make sure to maintain the hierarchy. C lick Apply and verify the place has been set. Enter the place you’ve set and define how to determine the emergency location. It can be determined by these values: ● Port ID ● Switch (Chassis) ID ● BSSID (Wi-Fi access points) ● Subnet ● User predefined location (see below for more details). - 86 -...
Page 94 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual The hierarchy of displaying a location is determined in the same order as above. Enter a location defined by a specific port ID. Make sure to enter the port description correctly, as delivered from your switch (* the switch must allow LLDP transmit and receive and provide LLDP information). Define a location defined by switch (Chassis) ID. T he location can be the same since a room defined in the previous step can reflect a room in a building using the same switch). - 87 -...
Page 95 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Define a location by subnet. T he location can be defined like switch ID (if in charge of several buildings, since it reflects a perimeter or an area). Verify all settings have been implemented correctly, under the Networks & locations tab. - 88 -...
Page 96 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Verify all settings have been implemented correctly, under the Networks & locations tab. - 89 -...
Page 97 After a location has been defined, make sure that: ● AudioCodes' phone runs the latest firmware released. ● AudioCodes' phone runs the Teams app issued June 2022 and later (U3-A and higher). ● E911 information is displayed on the phone screen 30-120 minutes after the location is set (time estimated under laboratory conditions).
Page 98: Updating Phone Firmware Manually
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Updating Phone Firmware Manually AudioCodes' Android Phone Utility allows network administrators to manually update a phone's firmware. ➢ To manually update a phone's firmware: From the PC's Start menu, select the app icon or click the application's exe file in the folder in which you saved it. In the 'Android Phone Address' field, enter the IP address of the device . - 91 -...
Page 99 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Click SSH Connect; a connection with the device is established. Under the 'Single Operations' section of the screen next to the field 'Firmware file', click the Browse button and navigate to and select the candidate image file. Click the Submit button; a firmware upgrade process starts; the phone is automatically rebooted; a notification pops up when the process finishes. The phone notifies you that it's being updated and rebooted. The above is also displayed when the phone is upgraded remotely from Microsoft Admin Portal or from AudioCodes' Device Manager. - 92 -...
Page 100: Loading Certificates To Phones
The IP address of the PC on which the certificate files are stored must be entered as shown here: ● The CA certificate (ca_cert) can also be loaded to devices using AudioCodes' Device Manager, in the 'Template' screen. ● Certificate loading is performed using HTTP. Prior to version 1.19, it was performed using SCP.
Page 101 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual ➢ To load certificates to a single device: In the Android Phone Utility (see Android Phone Utility on page 113 for detailed information about the application), enter the phone's IP address and click SSH Connect shown in the next figure. Click theBrowse button next to the field 'Device Cert' shown in the next figure and then navigate to and select the certificate file to download. Click the Load Certificates button shown in the next figure, to add the certificate. After a short period, view in the results pane 'Cert Successfully Installed'. ➢ To load certificates to multiple devices: In the Android Phone Utility (see Android Phone Utility on page 113 for more information), enter the phone's IP address and click SSH Connect. Click theBrowse button next to the field 'Device Cert' under Multi Operations and then navigate to and select the certificate file to download. ...
Page 102: Certificate Enrollment Using Scep
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Adjacent to the field 'Phones IP list' under 'Multi Operations', click the Browse button and then navigate to and select the txt file listing the IP addresses of the phones to which to download the certificates. The IP addresses are listed one under the other. Each occupies its own line. No notation between them is required. Click the now activated Load Certificates button shown in the next figure, to add the certificates to the phones. After a short period, view in the results pane 'Certs Successfully Installed'. Certificate Enrollment using SCEP [Feature in preview] The device supports certificate enrollment using Simple Certificate ...
Page 103 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Parameter Description 3EBE50003ABF1DF5E6B5A3230B02B856 security/SCEPEnroll/password_challenge Define the enrollment challenge password. Default v alue: NULL. Network admins must set its value to (for example): 7A7F9FC4BB7625F0935E67EA6D6322ED security/SCEPServerURL Define the NDES server’s URL. Default: NULL. Network admins must set its value to (for example): https://ndes_derver security/SCEPEnroll/renewal/advancethreshold Define the renewal advance threshold of the device c ertificate. Configure b etween 50 and 100 (in u nits of percentage) Default: 80 This i ndicates that a renewal of the ...
Page 104: Manually Performing Recovery Operations
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Manually Performing Recovery Operations Besides manual recovery options, the Android phones also feature an independent, automatic problem detection and recovery attempt capability that can culminate in recovery mode or in switching image slots. Android phones also feature a ‘hardware watchdog’.
Page 105: Removing Devices From Intune Management
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Removing Devices from Intune Management You can remove from Intune devices that are no longer needed, that are being repurposed, or that have gone missing. ➢ To remove devices from Intune: Go to Microsoft 365 Admin Centre [portal.office.com] and log in with an Administration account. Navigate to Endpoint Manager. - 98 -...
Page 106 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual The Endpoint Manager service is licensed according to individual terms. Con- sequently, not all network administrators will be able to navigate to it. Check if the license you're using includes the service or not.
Page 107 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Click Android Devices > Bulk Device Actions. - 100 -...
Page 108 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Select: OS > Android (Device Administrator) Device Action > Delete and then Next. Select Devices to include and search for the user for which enrolled devices are to be removed. - 101 -...
Page 109 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Select all the devices to be removed and click Select icon. After the devices are selected, click Next. - 102 -...
Page 110 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Click Create; a task to delete all the selected devices enrolled with a particular account is created. - 103 -...
Page 111: Configuring Audio-Related Parameters For Noisy Environments
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Once the action is created, the admin receives notification. It may take some time to completely sync the devices with the account so after delet- ing the devices wait for 30 minutes before signing in. Configuring Audio-Related Parameters for Noisy Environments Network administrators can configure audio-related parameters to support the phone in special ...
Page 112: Updating Microsoft Teams Devices Remotely
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Updating Microsoft Teams Devices Remotely For instructions on how to update Microsoft Teams devices remotely, see ere. Applying Firmware to a Phone from a USB Disk For recovery purposes, firmware can be applied to a phone from a USB disk. ➢ To apply the firmware from the USB disk: Enter recovery mode by simultaneously pressing the ‘back’ key + the MENU key; the device’s LED lights up red. Insert the USB disk with the target firmware. Figure 6-1: Apply update from a USB disk Select the ‘Apply update from USB disk’ option and then choose the correct firmware ...
Page 113: Managing Phones With The Device Manager
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual ● It is important to set the feature up in this order (i.e., first enable USB mode and then connect the USB cable). ● If the cable is connected before enabling the mode, you'll get this message: On a PC running Windows OS, navigate to Settings > Devices > Audio and make sure the ...
Page 114: Configuring A Periodic Provisioning Cycle
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual Change Tenant in the ‘Actions’ menu. Unless already used, it's recommended to leave the default tenant as a ‘lobby’ for the new devices. The above URL can also be configured in ...
Page 115: Configuring Timezone And Daylight Savings
Configuring TimeZone and Daylight Savings Network administrators can configure TimeZone and Daylight Savings to suit enterprise require- ments. AudioCodes' Teams phones feature a Automatic Time Zone Detection mechanism that allows the device to automatically detect the time zone via geographical location. If time zone is not configured, this feature is implemented.
Page 116: Managing Devices With Https
CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual For example, to configure Central European Summer Time (CEST) you can either configure: date_time/timezone=+01:00 date_time/time_dst=1 -OR- date_time/timezone=+02:00 date_time/time_dst=0 Managing Devices with HTTPS Android-based Teams devices support an HTTPS connection. ➢ To establish an HTTPS connection: The server certificate must be signed by a well-known Certificate Authority ■ -OR- A root/intermediate CA certificate must be loaded to the device’s trust store via ■ Configuration File parameter ‘ /security/ca_certificate/[0-4]/uri’ ➢ To maintain backward compatibility with devices previously running UC versions: Configure parameter '/security/SSLCertificateErrorsMode' to Ignore...
Page 117 CHAPTER 6 Performing Administrator-Related Operations C455HD | Users & Administrator's Manual date_time/time_format = 12 (default) / 24 ■ ■ network/dhcp_enabled = 0/1 ■ network/ip_address = network/subnet_mask = ■ ■ network/default_gateway = network/primary_dns = ■ ■ network/pecondary_dns = network/pc_port = 0/1 ■ ■ office_hours/start = 08:00 ■ office_hours/end = 17:00 logging/enabled = 0/1 ■ ■ logging/levels = VERBOSE, DEBUG, INFO, WARN, ERROR, ASSERT, SILENT admin/default_password = 1234 ■ ■ admin/ssh_enabled=0/1 (default) security/SSLCertificateErrorsMode = IGNORE, NOTIFICATION, DISALLOW (default) ■...
Page 118: Troubleshooting
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Troubleshooting The information presented here shows how to troubleshoot AudioCodes devices. DSCP The phone's Teams application supports DS (Differentiated Services) containing a differentiated Services Code Point (DSCP) value and an ECN (Explicit Congestion Notification) value, for monitoring Quality of Service (QoS). DSCP is part of the IP header that defines the type of routing service to tag outgoing voice ...
Page 119: Users
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Figure 7-3: Audio Users Read the following if an issue with your phone occurs. Contact your network administrator if necessary. Network administrators can also use this documentation as reference. Table 7-1: Troubleshooting Symptom Problem Corrective Procedure Phone is off Phone is not Make sure the AC/DC power adapter is attached ■ (no screen receiving firmly to the DC input on the rear of the phone. displays and power Make sure the AC/DC power adapter is plugged into ■ LEDs) the electrical outlet. ■ Make sure the electrical outlet is functional. If using Power over Ethernet (PoE), contact your ■ network administrator to check that the switch is powering the phone.
Page 120: Network Administrators
Android Phone Utility AudioCodes' IP phone is by default accessed via Secure Shell (SSH) cryptographic network protocol after the network administrator signs in. SSH is by default disabled and can be enabled with Administrator permissions in the phone screen (Device Administration >...
Page 121 CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual In the 'Android Phone Address' field, enter the IP address of the device (get it by pressing the MENU hard key > About phone > Status > IP Address). Click SSH Connect; a connection with the device is established. Next to the field 'PC folder', click the Browse button and navigate to and select the folder to which to send data to use for debugging. - 114 -...
Page 122: Capturing The Phone & Sidecar Screen
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Capturing the Phone & Sidecar Screen AudioCodes' Android Phone Utility allows network administrators to effectively collaborate and debug issues using the screen-capturing feature. The feature enables capturing the phone's main screen as well as the phone’s Expansion Module (sidecar) in the case of the C455HD phone model with sidecar. ➢ To capture the phone screen: Open the Android Phone Utility: From the PC's Start menu, select the app icon or click the application's exe file in the folder in which you saved it. In the 'Android Phone Address' field, enter the IP address of the device (get it by pressing the MENU hard key > About phone > Status > IP Address). Click SSH Connect; a connection with the device is established. Next to the field 'PC folder', click the Browse button and navigate to and select the folder to which to send the screen captures. Make sure that the drop-down menu next to the Screen Capture button shows main. Click the Screen Capture button; the phone's screen is captured and the screenshot is ...
Page 123: Running Tcpdump
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual ➢ To capture the Expansion Module (sidecar) screen: [Applies only to the C450HD with sidecar] Make sure the drop-down menu next to the Screen Capture button shows sidecar. By default, the field indicates main, i.e., the phone’s main screen. Click the Screen Capture button; the phone's sidecar screen is captured and the screenshot is saved and sent to the folder defined as shown in step 4 of the preceding procedure. On your PC, navigate to the folder and retrieve the screenshot. Default file name: screencap.png. Rename it to a name related to the screen you captured. If you don't rename it, it will be overwritten the next time you take a screenshot. The figure below shows an example of a screenshot of the Expansion Module (sidecar). Running Tcpdump Tcpdump is a common packet analyzer that allows network administrators to display TCP/IP and other packets transmitted or received over the IP telephony network, for debugging ...
Page 124: Getting Information About Phones
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Next to the Tcpdump button, set the time period or leave it at the default. Default: 30 seconds. Click the Tcpdump button and then after the progress indicator reaches the end you'll view in the results pane a 'Finished' indication. Open the folder on the PC to which you commanded the application to send the information and locate and open the file 'net.pcap'. Alternatively, run Tcpdump without the utility. ➢ To run tcpdump without the utility: Access the phone via SSH and run the following commands: setprop ac.ac_tcpdump.timeout <seconds> After defining the capturing time as shown in the preceding command, start the capture: setprop ac.ac_tcpdump 1 Tcpdump capture file will appear in this location: /sdcard/recording/net.pcap After running Tcpdump, reproduce the issue. Execute the following command from your PC command prompt (cmd): scp -r admin@%deviceIp%:/sdcard/recording/ %FolderOnPc% Getting Information about Phones Network administrators can get information about phones using AudioCodes' SSH protocol ...
Page 125 CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual ➢ To get information about the phone: Open the Android Phone Utility (see Android Phone Utility on page 113 for more information about the application), enter the phone's IP address, click the adjacent SSH Connect button and browse to a folder on the PC to which to send the information. Click the Get Version button. View the information in the pane. Alternatively: ● To get firmware information, in the 'Command' field enter the following and then click Send: getprop ro.build.id ● To get Bootloader information using SSH protocol, in the utility's 'Command' field enter the following and then click Send: getprop ro.bootloader ● To get DSP information using SSH protocol, in the utility's 'Command' field enter the following and then click Send: getprop ro.ac.dsp_version ●...
Page 126: Remote Logging (Syslog)
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual ● To get the Microsoft Admin version using SSH protocol, in the utility's 'Command' field enter the following and then click Send: getprop ro.agent.version Remote Logging (Syslog) Remote Logging via Syslog provides the same log level as Device Diagnostics (performed via the Microsoft Teams Admin Center) with some additional information that may be relevant to ...
Page 127: Getting Diagnostics
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual ➢ To enable Remote Logging via Syslog from the phone: Log in to the phone as Administrator and go back. In the ‘Device administration’ screen, select Debugging. Select Remote logging. Configure the ‘Remote IP address’ and ‘Remote port’ and enable ‘Remote Logging’; the device starts sending logs to the Syslog server. Network administrators can also enable Syslog using Secure Shell (SSH) protocol. ➢ To enable Syslog using SSH protocol, type the following command at the shell prompt: setprop persist.ac.rl_address <syslog_server_ip>:<port>.
Page 128 CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Select the Diagnostic Data option. Select OK to confirm. Wait until the screen shown in the preceding figure disappears; the phone creates all necessary logs and copies them to the its SD Card / Logs folder. Get the logs using SCP notation as follows: scp -r admin@host_IP:/sdcard/logs/ . - 121 -...
Page 129: Getting Logs
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual The following diagnostics files are then received from the phone: ● dmesg.log ● dumpstate-c470hd-1.18.117_58793-41-undated-dumpstate_log-3458.txt ● dumpstate-c470hd-1.18.117_58793-41-undated.txt ● dumpstate-stats.txt ● logcat.log Getting Logs Network administrators can get bug report logs, including a logcat file and a configuration file, to expedite debugging. ➢ To get logs: In the AudioCodes Android Phone Utility (seeAndroid Phone Utility on page 113 f or more information about the application), enter the phone's IP address, click SSH Connect and ...
Page 130: Activating Dsp Recording
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Open the folder on the PC to which you commanded the application to send the information. Unzip the zipped files and open the txt files to view the report. Activating DSP Recording Network administrators can activate DSP recording using AudioCodes' SSH protocol based Android Phone Utility. ➢ To activate DSP Recording: In the AudioCodes Android Phone Utility (see Android Phone Utility on page 113 for more information about the application), enter the phone's IP address, click SSH Connect and then click the Browse button next to the field 'PC folder' to configure a folder on the PC to which to send the information. In the 'PC IP Address' field, enter the IP address of the PC on which the utility is installed and then click the Start DSP Record button. After a period of recording, click Stop DSP Record. View the DSP recording in the PC folder you configured. Network administrators can alternatively activate a DSP recording using SSH pro- tocol without the Android Phone Utility, as shown next.
Page 131: Deactivating Dsp Recording
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual ➢ To activate DSP recording using SSH protocol without the utility, type the following at the shell prompt: setprop ac.dr_voice_enable true setprop ac.dr_ipaddr <ip_address> setprop ac.dr_port 50000 DSP recording can be activated on the fly without requiring the network administrator to reset the phone.
Page 132: Ssh
● The default password can be changed per device in the phone screen, or via bulk configuration of multiple devices using Microsoft's TAC or AudioCodes' Device Manager. ● After entering a password, the user is prompted to verify it. Criteria required for a strong password are provided: The password length must be greater than or equal to 8.
Page 133: Installing The Apk Using Ssh
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Installing the APK using SSH Network administrators can install the Team Android Application Package using SSH protocol. Updating Phones using SSH Commands ➢ To upgrade firmware: Download the required firmware version to sdcard/update_image.zip. For example, use the following: SCP <file name> admin@<DeviceIP>:/sdcard/update_image.zip Update the firmware using the following: setprop ctl.start local_update Track progress using the following: logcat | grep update_engine_client_android ➢ To upgrade the Android Package Kit (APK): Download the required APK to sdcard/teams.apk...
Page 134: Microsoft Teams Admin Center
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual command/bugreport 1 Wait until the logs are created (see in /sdcard/logs/bugreports/ that there is a .gz file) Get the logs from the "/sdcard/logs/bugreports/" folder. For example, use the following: SCP admin@<DeviceIP>:/sdcard/logs/bugreports/<log file name> C:\<destination Directory> ➢ To install the Client Certificate: Download c ertificates to /sdcard/devcert/ Install the certificate using the following: setprop ctl.start sdcard_certs_install. Microsoft Teams Admin Center The Microsoft Teams Admin Center allows network administrators to troubleshoot issues encountered with the phone. Collecting Logs Network administrators can download all logs from the Microsoft Teams admin center. Logs ...
Page 135 CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Figure 7-4: Microsoft Teams Admin Center - Diagnostics Applies to all AudioCodes phones for Microsoft Teams even though a specific model is shown in the figures here. Click the Diagnostics icon and in the 'Device diagnostics' prompt that pops up, click Proceed; log files are retrieved from the devices and uploaded to the server. - 128 -...
Page 136 CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Figure 7-5: Microsoft Teams Admin Center – Logs Upload to Server Click the History tab. Figure 7-6: History - Download Click Download to download the logs. - 129 -...
Page 137: Getting Audio Debug Recording Logs
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual ● AudioCodes Device Manager's ‘Collect Logs’ action also includes all information collected by Microsoft Teams admin center (TAC). The .zip file includes the following files: ✔ Android BugReport ✔ AdminAgentLogs.zip - includes logcat collected by the OVOC/Device Manager.
Page 138: Collecting Media Logs (*.Blog) From The Phone
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual Enable ‘Voice record’. Start Wireshark on your PC to capture the Audio traffic. Collecting Media Logs (*.blog) from the Phone Network administrators can collect Media Logs (*.blog) from the phone. ➢ To collect Media Logs (*.blog) from the phone Access the phone via SSH. SSH is by default disabled and can be enabled with Administrator permissions in the phone screen (Device Administration >...
Page 139: Port Mirroring Network Monitoring
CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual View all the interfaces on the phone and choose your preferred interface with which to capture packets. Port Mirroring Network Monitoring The phone supports the port mirroring network monitoring technique of copying and sending network packets transmitted as input from a phone port, to another port of a monitoring device for enhanced analysis and debugging capability. ➢ To enable the feature: ■...
Page 140 CHAPTER 7 Troubleshooting C455HD | Users & Administrator's Manual This page is intentionally left blank. - 133 -...
Page 141 International Headquarters 1 Hayarden Street, Airport City Lod 7019900, Israel Tel: +972-3-976-4000 Fax: +972-3-976-4040 AudioCodes Inc. 80 Kingsbridge Rd Piscataway, NJ 08854, USA Tel: +1-732-469-0880 Fax: +1-732-469-2298 Contact us: https://www.audiocodes.com/corporate/offices-worldwide Website: https://www.audiocodes.com/ Documentation Feedback: https://online.audiocodes.com/documentation- feedback ©2023 AudioCodes Ltd.. All rights reserved. AudioCodes, AC, HD VoIP, HD VoIP Sounds Better, IPmedia, Mediant, MediaPack, What’s Inside Matters, OSN, SmartTAP, User Management Pack, VMAS, VoIPer- fect, VoIPerfectHD, Your Gateway To VoIP, 3GX, VocaNom, AudioCodes One Voice, AudioCodes Meeting Insights, and AudioCodes Room Experience are trademarks or registered trademarks of AudioCodes Lim- ited. All other products or trademarks are property of their respective owners. Product specifications are subject to change without notice. Document #: LTRT-13319 ...

AudioCodes C455HD User's And Administrator's Manual

Quick Links

Need help?

Questions and answers

Related Manuals for AudioCodes C455HD

Summary of Contents for AudioCodes C455HD

Table of Contents