To change the time on the Yealink SIP-T48G phone via the phone user interface:

1. Tap -> Basic -> Time & Date -> General.
2. Tap the gray box of the Type field.
3. Select "SNTP Settings" from the pull-down list.

This configures the phone to obtain the time automatically from an SNTP server. If it cannot get the time from the SNTP server, contact your system administrator.

This answer is automatically generated

Summary of Contents for Yealink SIP-T48G

Page 2 Copyright © 2014 YEALINK NETWORK TECHNOLOGY CO., LTD. Copyright © 2014 Yealink Network Technology CO., LTD. All rights reserved. No parts of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, photocopying, recording, or otherwise, for any purpose, without the express written permission of Yealink Network Technology CO., LTD.
Page 3 Do not dispose of WEEE as unsorted municipal waste and have to collect such WEEE separately. We are striving to improve our documentation quality and we appreciate your feedback. Email your opinions and comments to DocsFeedback@yealink.com.
Page 4 Yealink SIP-T48G IP phone firmware contains third-party software under the GNU General Public License (GPL). Yealink uses software under the specific terms of the GPL. Please refer to the GPL for the exact terms and conditions of the license. The original GPL license, source code of components licensed under GPL and used in Yealink products can be downloaded online: http://www.yealink.com/GPLOpenSource.aspx?BaseInfoCateId=293&NewsCateId=293&CateId=293.
Page 5 Packaging Contents and Regulatory Notices sections in this guide before you set up and use the SIP-T48G IP phone. If this is your first time using the SIP-T48G IP phone, we recommend that you first refer to Quick Installation Guide...
Page 6 User Guide for the SIP-T48G IP Phone Packaging Contents on page ...
Page 7: Table Of Contents
Table of Contents About This Guide ..............ix In This Guide........................ix Summary of Changes ..................... ix Changes for Release 72, Guide Version 72.2 ............. ix Table of Contents ..............xi Overview ................1 Hardware Component Instructions ................. 1 Icon Instructions........................ 2 LED Instructions ........................
Page 8: Table Of Contents
User Guide for the SIP-T48G IP Phone Key as Send ........................ 31 Audio Settings ........................ 31 Volume ......................... 31 Ring Tones ........................32 Contact Management ....................34 Directory ........................34 Local Directory ......................36 Blacklist........................51 Remote Phone Book ....................53 Call History Management .....................
Page 9: Table Of Contents
Table of Contents Busy Lamp Field (BLF)....................125 Call Recording ......................128 Hot Desking ........................131 Intercom........................132 Outgoing Intercom Calls ..................133 Incoming Intercom Calls ................... 133 Multicast Paging ......................135 Sending RTP Stream ....................135 Receiving RTP Stream ....................137 Music on Hold ......................
Page 10 User Guide for the SIP-T48G IP Phone...
Page 11: Overview
 LED Instructions  User Interfaces  Documentations  If you require additional information or assistance with your new phone, contact your system administrator. The main hardware components of the SIP-T48G IP phone are the touch screen and the keypad.
Page 12 User Guide for the SIP-T48G IP Phone Hardware component instructions of the SIP-T48G IP phone are: Item Description ① Power Indicator LED Indicates phone power and some feature statuses. Shows information about calls, messages, soft keys, time, date and other relevant data: •...
Page 13 Overview Icons Description Registering (Flashing) Hands-free speakerphone mode Handset mode Headset mode Multi-lingual lowercase letters input mode Multi-lingual uppercase letters input mode Alphanumeric input mode Numeric input mode Multi-lingual uppercase and lowercase letters input mode Voice Mail Auto Answer Do Not Disturb Call Forward Call Hold Call Mute...
Page 14 User Guide for the SIP-T48G IP Phone Icons Description A call cannot be recorded Recording starts successfully Recording cannot be started Recording cannot be stopped Bluetooth mode is on Bluetooth headset is both paired and connected The default caller photo and contact icon...
Page 15: User Interfaces
Overview Two ways to customize configurations of your SIP-T48G IP phone: The user interface on the IP phone.  The user interface in a web browser on your PC.  The hardware components keypad and touch screen constitute the phone user interface, which allows the user to execute all call operation tasks and basic configuration changes directly on the phone.
Page 16 User Guide for the SIP-T48G IP Phone Options Phone User Interface Web User Interface --Auto Answer √ --Auto Redial √ --Call Completion √ --Call Forward √ --Call Waiting √ --Call Park √ --Call Pickup √ --Call Return √ --Conference --Anonymous Call √...
Page 17: Documentations
--STUN Server √ Note The table above lists most of the feature options. Please refer to the relevant sections for more information. The following table shows documentations available for the SIP-T48G IP phone. Name Contents Where found Language Quick Installation...
Page 18 User Guide for the SIP-T48G IP Phone...
Page 19: Getting Started
Getting Started This chapter provides the following basic installation instructions and information for obtaining the best performance with the SIP-T48G IP phone. Topics include: Packaging Contents  Phone Installation  Phone Initialization  Phone Status  Basic Network Settings ...
Page 20 User Guide for the SIP-T48G IP Phone Wall Mount Bracket (Optional)  Power Adapter (Optional)  Handset & Handset Cord  Ethernet Cable  Quick Installation Guide & Quick Reference Guide  Check the list before installation. If you find anything missing, contact your system...
Page 21 The top two slots are plugged up by silica gel. You need to pull out silica gel before attaching the wall mount bracket. For more information on how to mount your phone to a Yealink Wall Mount Quick Installation Guide for T4X IP Phones wall, refer to...
Page 22 The EXT port can also be used to connect an expansion module EXP40. For more information on how to use EHS36, EXP40 and Bluetooth USB Dongle BT40, refer to Yealink EHS36 User Guide, Yealink EXP40 User Guide and Yealink Bluetooth USB Dongle BT40 User Guide.
Page 23: Phone Initialization
Getting Started Power over Ethernet With the included or a regular Ethernet cable, the SIP-T48G IP phone can be powered from a PoE-compliant switch or hub. To connect the PoE: Connect the Ethernet cable between the Internet port on the phone and an available port on the in-line power switch/hub.
Page 24 User Guide for the SIP-T48G IP Phone Generally, your phone will be deployed with multiple other phones. In this case, your system administrator will configure the phone parameters beforehand, so that after you start up your phone, the phone will be registered and ready for use. If your phone is not registered, you may have to register it.
Page 25 Getting Started Name Description up to six lines. Various features can be assigned to line keys. Each line key can show the label and indicate status of the assigned feature. Provides a quick access to the line key DSS Key configuration screen.
Page 26 User Guide for the SIP-T48G IP Phone Name Description Screen Title Area Displays the title of the access menu screen. Displays various operation options for Operation Option Area different menu screens. Displays menu items. You can tap the desired menu item to enter...
Page 27 Getting Started values page by page, or press scroll values one by one. From the pull-down list, tap the value or scroll Select a value for a field. to the value and then press You can enter data and edit fields using the keypad on the phone: To enter or edit data: Tap the field.
Page 28: Phone Status
User Guide for the SIP-T48G IP Phone You can view phone status via phone user interface or web user interface. Available information of phone status includes: General information (IP address, MAC address and firmware version)  Network status (e.g., IPv4 status, IPv6 status, IP address mode and MAC address) ...
Page 29 Getting Started Enter the user name (admin) and password (admin) in the login page. Click Confirm to login. The phone status is displayed on the first page of the web user interface. If your phone cannot contact a DHCP server for any reason, you need to configure network settings manually.
Page 30 User Guide for the SIP-T48G IP Phone Tap the desired value (IPv4, IPv6 or IPv4 & IPv6) from the pull-down list. Tap the Save soft key to accept the change or to cancel. To configure a static IPv4 address via phone user interface: ->Advanced (password: admin) ->Network->WAN Port->IPv4.
Page 31 Getting Started Enter the desired values in the IP Address, IPv6 IP Prefix, Gateway, Primary DNS and Secondary DNS fields respectively. Tap the Save soft key to accept the change or to cancel. If you are using an xDSL modem, you can connect your phone to the Internet via PPPoE mode.
Page 32 User Guide for the SIP-T48G IP Phone...
Page 33: Wallpaper
If you require additional information or assistance with your new phone, contact your system administrator. You can customize the wallpaper of the SIP-T48G IP phone. You can change the wallpaper image via phone user interface or web user interface. You can also upload custom wallpaper images via web user interface.
Page 34: Backlight
User Guide for the SIP-T48G IP Phone , or press to select the desired wallpaper image. Tap the Save soft key to accept the change or to cancel. Wallpaper is configurable via web user interface at the path Settings->Preference. To upload the custom wallpaper via web user interface: Click on Settings->Preference.
Page 35: Contrast
Backlight is configurable via web user interface at the path Settings->Preference. You can configure the contrast of the expansion module EXP40 connected to the SIP-T48G IP phone to a comfortable level on the phone. Ensure that the expansion module has been connected to the phone before configuration.
Page 36: Language
User Guide for the SIP-T48G IP Phone Tap the desired value from the pull-down list. The default contrast level is 6. Tap the Save soft key to accept the change or to cancel. The default language of the phone user interface is English. The phone will detect and use the same language as which of your web browser for the web user interface.
Page 37: Time & Date
Customizing Your Phone Tap the desired language. Tap the Save soft key to accept the change. Text displayed on the phone user interface will change to the selected language. To change the language for the web user interface: Click on Settings->Preference. Select the desired language from the pull-down list of Language.
Page 38 User Guide for the SIP-T48G IP Phone To configure the SNTP settings via phone user interface: ->Basic->Time & Date->General. Tap the gray box of the Type field. Tap SNTP Settings from the pull-down list. Tap the gray box of the Time Zone field.
Page 39 Customizing Your Phone Enter the specific date and time in the corresponding fields. Tap the Save soft key to accept the change. The time and date displayed on the touch screen will change accordingly. There are 7 available date formats. For example, for the date format “WWW DD MMM”, “WWW”...
Page 40: Administrator Password
User Guide for the SIP-T48G IP Phone Tap the desired time format (12 Hour or 24 Hour) from the pull-down list. Tap the Save soft key to accept the change or to cancel. Time and date are configurable via web user interface at the path Settings->Time &...
Page 41: Volume
Customizing Your Phone You can set the "#" or "*" to perform as a send key while dialing. To configure key as send via phone user interface: ->Call Features->General. Tap the gray box of the Key as Send field. Tap # or * from the pull-down list, or tap Disabled to disable this feature. Tap the Save soft key to accept the change or to cancel.
Page 42: Ring Tones
User Guide for the SIP-T48G IP Phone To adjust the volume when the phone is idle: Press to adjust the ringer volume. Note If ringer volume is adjusted to minimum, the icon will appear on the touch screen. To adjust the volume when the phone is during a call:...
Page 43 Customizing Your Phone Tap the desired ring tone. Tap the Save soft key to accept the change or to cancel. To select a ring tone for the account via web user interface: Click on Account. Select the desired account from the pull-down list of Account. Click on Basic.
Page 44: Directory
User Guide for the SIP-T48G IP Phone To upload a custom ring tone for your phone via web user interface: Click on Settings->Preference. In the Upload Ringtone field, click Browse to locate a ring tone file (the file format must be *.wav) from your local system.
Page 45 Customizing Your Phone The selected list appears in the Enabled column. Repeat the step 2 to add more lists to the Enabled column. To remove a list from the Enabled column, select the desired list and then click Click Confirm to accept the change. Note Directory is configurable via web user interface only.
Page 46: Local Directory
User Guide for the SIP-T48G IP Phone If more than one list is enabled for the directory, tap the desired list you want to view, and then tap the OK soft key. The built-in phone directory can store the names and phone numbers of your contacts.
Page 47 Customizing Your Phone Tap New Group. Enter the desired group name in the highlighted field. to accept the change. to specify a ring tone for the group. Tap the desired ring tone. If Auto is selected, the contact in this group will use the ring tone specified to the contact.
Page 48 User Guide for the SIP-T48G IP Phone Tap Setting. Tap the desired group. after the group. Edit the group name in the highlighted field. to accept the change. To delete a group from the local directory: The IP phone enters the local directory directly as there is only Local Directory in the directory by default.
Page 49: Adding Contacts Manually
Customizing Your Phone You can add contacts to the local directory in the following ways: Manually  From call history  From remote phone book  Adding Contacts Manually To add a contact to the local directory manually: The IP phone enters the local directory directly as there is only Local Directory in the directory by default.
Page 50 User Guide for the SIP-T48G IP Phone 11. Tap the Save soft key to accept the change or to cancel. Note If the contact has existed in the directory, the touch screen will prompt “Contact name already existed!”. Adding Contacts from Call History To add a contact to the local directory from the call history: to turn pages.
Page 51 Customizing Your Phone Adding Contacts from remote phone book To add a contact to the local directory from remote phone book: The IP phone enters the local directory directly as there is only Local Directory in the directory by default. Tap Remote Phone Book.
Page 52 User Guide for the SIP-T48G IP Phone Edit the corresponding fields. Tap the Save soft key to save the contact to the local directory. If the contact has already existed in the local directory, the touch screen will prompt "Overwrite the original contact?". Tap the OK soft key to overwrite the original contact in the local directory or the Cancel soft key to cancel.
Page 53 Customizing Your Phone Tap the Save soft key to accept the change or to cancel. To delete a contact from the local directory: The IP phone enters the local directory directly as there is only Local Directory in the directory by default. If Local Directory is disabled for the directory, tap ->All Contacts or tap ->...
Page 54 User Guide for the SIP-T48G IP Phone If Local Directory is disabled for the directory, tap ->All Contacts or tap -> Directory ->All Contacts to enter the local directory. Tap Setting. Tap the checkbox of Select All. Tap Delete. The touch screen prompts the following warning: Tap the OK soft key to confirm the deletion or the Cancel soft key to cancel.
Page 55 Customizing Your Phone Click Upload Photo to upload the photo. You can click Delete Photo to delete the custom photo. The phone only supports the *.png, *.jpg and .bmp format files. The file size must be less Note than 5M. You can only delete the custom photo.
Page 56 User Guide for the SIP-T48G IP Phone To place a call to a contact from the local directory: The IP phone enters the local directory directly as there is only Local Directory in the directory by default. If Local Directory is disabled for the directory, tap ->All Contacts or tap...
Page 57 Customizing Your Phone To search for a contact in the local directory: The IP phone enters the local directory directly as there is only Local Directory in the directory by default. If Local Directory is disabled for the directory, tap ->All Contacts or tap ->...
Page 58 User Guide for the SIP-T48G IP Phone To adjust the display order of the enabled list, select the desired list, and click Click Confirm to accept the change. The touch screen will display the search results in the adjusted order.
Page 59 Customizing Your Phone You can manage your phone’s local directory via phone user interface or web user interface. But you can only import or export the contact list via web user interface. To import an XML file of contact list via web user interface: Click on Directory->Local Directory.
Page 60 User Guide for the SIP-T48G IP Phone It will prevent importing the title of the contact information which is located in the first line of the CSV file. Click Import CSV to import the contact list. (Optional.) Mark the On radio box in the Delete Old Contacts field.
Page 61: Blacklist
Customizing Your Phone To export a contact list via web user interface: Click on Directory->Local Directory. Click Export XML (or Export CSV). Click Save to save the contact list to your local system. Note Importing/exporting contact lists is available via web user interface only. The built-in phone directory can store the names and phone numbers for a blacklist.
Page 62 User Guide for the SIP-T48G IP Phone Enter the name and the office, mobile or other numbers in the corresponding fields. Tap the gray box of the Account field. Tap the desired account from the pull-down list. If Auto is selected, the phone will use the first available account when placing calls to the contact from the blacklist directory.
Page 63: Remote Phone Book
Customizing Your Phone page 36. You can add local contacts, search for a contact, or simply dial a contact number from the corporate directory. You can configure your new phone to access up to 5 corporate directories. The phone supports up to 5000 corporate directory entries. For the access URL of the corporate directory, contact your system administrator.
Page 64 User Guide for the SIP-T48G IP Phone The phone connects to load the corporate directory, and then displays corporate contacts on the touch screen. You can tap to back to the previous interface. To search for a contact in the corporate directory: ->Remote Phone Book.
Page 65 The default value is 21600 seconds. Click Confirm to accept the change. The SIP-T48G IP phone maintains call history lists of Missed calls, Placed calls, Received calls and Forwarded calls. Call history lists support 400 entries in all. You can view the call history, place a call, add a contact or delete an entry from the call history list.
Page 66 User Guide for the SIP-T48G IP Phone To view the call history: The touch screen displays all call records. to turn pages. You can also press to switch pages. You can tap Missed, Placed, Received or Forwarded to view entries in each call list directly.
Page 67 Customizing Your Phone To add a contact to the blacklist directory from the call history list: The touch screen displays all call records. to turn pages. You can also press to switch pages. You can tap Missed, Placed, Received or Forwarded to view entries in each call list directly.
Page 68 User Guide for the SIP-T48G IP Phone The touch screen prompts the following warning: Tap the OK soft key to confirm the deletion or the Cancel soft key to cancel. To delete all entries from the call history list: The touch screen displays all call records.
Page 69 Customizing Your Phone The touch screen prompts the following warning: Tap the OK soft key to confirm the deletion or the Cancel soft key to cancel. If you want to use a wired headset, physically connect your headset and activate the headset mode for use.
Page 70 User Guide for the SIP-T48G IP Phone using the headset to place a call, refer to Placing Calls on page 88. To deactivate the headset mode: Press again on the phone. The HEADSET key LED goes out, and the icon disappears from the touch screen when the headset mode is deactivated.
Page 71: Bluetooth Headset
Note Dual headset is configurable via web user interface only. The SIP-T48G IP phone supports Bluetooth. Bluetooth enables low-bandwidth wireless connections within a range of 10 meters (32 feet). The best performance is in the 1- to 2-meter (3- to 6-foot) range.
Page 72 User Guide for the SIP-T48G IP Phone To activate the Bluetooth mode via phone user interface: ->Basic->Bluetooth. Tap the On radio box of the Bluetooth field. The IP phone scans the available Bluetooth headset automatically. The touch screen displays the Bluetooth icon and the Bluetooth device information (device name and MAC address).
Page 73 Customizing Your Phone When there is no found Bluetooth devices on the touch screen, tap the Scan soft key to search the Bluetooth device. The phone prompts you to enter the password. Enter the PIN in the Password field. The default PIN is “0000”. Tap the OK soft key.
Page 74 User Guide for the SIP-T48G IP Phone The Bluetooth icon appears on the touch screen. With the Bluetooth headset paired and connected, you can use the Bluetooth headset to place and answer calls. For more information, refer to the documentation from the Bluetooth headset manufacturer.
Page 75 Customizing Your Phone Tap the Off radio box of the Auto Connect field. To change the priority of paired Bluetooth devices： ->Basic->Bluetooth. after the desired Bluetooth headset. Tap Move Up or Move Down from the prompt list. The top one has the highest priority. When there is no Bluetooth headset connected, the phone will automatically connect to a Bluetooth headset with the highest priority.
Page 76 User Guide for the SIP-T48G IP Phone you need to scan and connect it again. To delete your Bluetooth headset from your phone: ->Basic->Bluetooth. after the desired Bluetooth headset you want to delete. Tap the Delete soft key from the prompt list.
Page 77: Dss Keys
Two types of DSS keys: Line Keys and Programmable Keys. Details will be introduced in the following. The SIP-T48G IP phone supports 30 line keys. You can assign predefined functionalities to line keys. You can also define a label for line key feature which will appear on the touch screen.
Page 78 User Guide for the SIP-T48G IP Phone Tap the Save soft key to accept the change or to cancel. You can also tap the line key 30 (DSS Key), and then tap the desired line key to assign functionality to it.
Page 79 Customizing Your Phone Speed Dial You can use this key feature to speed up dialing the numbers often used or hard to remember. Type (Speed Dial) Dependencies: Account ID (the account this feature will be applied to) Label (key label displayed on the touch screen) Value (the number you want to dial out) Usage: Tap the speed dial key to dial out the number specified in the Value field, using the account selected from the Account ID field.
Page 80 User Guide for the SIP-T48G IP Phone Value (the group pickup code) Usage: Tap the group pickup key on your phone when a phone number in the group receives an incoming call. The call is answered on your phone. DTMF You can use this key feature to send the specification of arbitrary key sequences via DTMF.
Page 81 Customizing Your Phone Type (Key Event) Dependencies: Key Event (XML Group) XML Group (the remote group name you want to access if remote phone book is configured) Label (key label displayed on the touch screen) Usage: Tap the XML group key to access the remote group specified in the XML Group field.
Page 82 User Guide for the SIP-T48G IP Phone Usage: Tap the conference key during an active call to set up a conference with the number specified in the Value field. Note When leaving the Value field blank, the conference key performs the same as the Conference soft key during a call.
Page 83 Customizing Your Phone new call to the number specified in the Value field. Transfer mode via DSS key is configurable via web user interface at the path Note Features->Transfer. For more information on how to configure the transfer mode via DSS key, refer to Busy Lamp Field (BLF) on page 125.
Page 84 User Guide for the SIP-T48G IP Phone Label (key label displayed on the touch screen) Usage: During a call, tap the group listening key to activate the group listening mode. You can then speak and listen through the handset/headset, other people at your side can listen through speaker at the same time.
Page 85 Note Programmable keys are configurable via web user interface only. You can register one or multiple accounts on the SIP-T48G IP phone. You can also configure each line key to associate with an account or configure multiple line keys to associate with an account.
Page 86 User Guide for the SIP-T48G IP Phone for more information. Tap the Save soft key to accept the change or to cancel. You can repeat steps 2 to 5 to register more accounts. The following figures show single or multiple accounts registered on the phone:...
Page 87 Customizing Your Phone To configure the default account via phone user interface: ->Call Features->Default Account. Tap the gray box of the Default Account field. Tap the desired account from the pull-down list. Tap the Save soft key to accept the change or to cancel.
Page 88: Dial Plan
User Guide for the SIP-T48G IP Phone Dial plan is a string of characters that governs the way your SIP-T48G IP phone processes the inputs received from your phone keypad. The SIP-T48G IP phone supports the following dial plan features: Replace Rule ...
Page 89 Customizing Your Phone To add a replace rule via web user interface: Click on Settings->Dial Plan->Replace Rule. Enter the string (e.g., 2xx) in the Prefix field. Enter the string (e.g., 12345) in the Replace field. Enter the desired line ID in the Account field or leave it blank. Click Add to add the replace rule.
Page 90 User Guide for the SIP-T48G IP Phone Click Del to delete the replace rule(s). Note Replace rule is configurable via web user interface only. You can configure one or more dial-now rules (up to 100) on your phone. When the dialed number matches the dial-now string, the number will be dialed out automatically.
Page 91 Customizing Your Phone phone to dial out the phone number automatically, which matches a dial-now rule, after the specified delay time. To configure the delay time for dial-now rule via web user interface: Click on Features->General Information. Enter the time within 1-14 (in seconds) in the Time-Out for Dial-Now Rule field. The default value is 1.
Page 92 User Guide for the SIP-T48G IP Phone For more information on the valid value of the Account field, refer to Replace Rule on page 78. Click Confirm to accept the change. Note The default values of minimum and maximum length are 1 and 15 respectively.
Page 93: Live Dialpad
Block out number is configurable via web user interface only. You can enable live dialpad on the SIP-T48G IP phone, which enables the IP phone to automatically dial out the phone number without pressing any other key. You can also configure a delay, where the phone will dial out the phone number automatically after the specified period of time.
Page 94: Hotline
User Guide for the SIP-T48G IP Phone Enter the desired delay time in the Inter Digit Time (1~14s) field. The default delay time is 4s. Click Confirm to accept the change. Note Live dialpad is configurable via web user interface only.
Page 95 Customizing Your Phone Hotline is configurable via web user interface at the path Features->General Information.
Page 96 User Guide for the SIP-T48G IP Phone...
Page 97: Basic Call Features
Basic Call Features The SIP-T48G IP phone is designed to be easily used like a regular phone on a public switched telephone network (PSTN). You can place calls, answer calls, transfer a call to someone else, or conduct a conference call.
Page 98 User Guide for the SIP-T48G IP Phone You can place a call in three ways using your SIP-T48G IP phone: Using the handset  Using the speakerphone  Using the headset  You can also dial the number first, and then choose the way you want to speak to the other party.
Page 99 Basic Call Features You can enter the number using the keypad displayed on the touch screen. You can also tap the History soft key or the Directory soft key to search for an entry, and then place a call. Press , or tap the Send soft key.
Page 100 60. To place multiple calls: You can have more than one call on your SIP-T48G IP phone. To place a new call during an active call, do one of the following: Tap the line key. The active call is placed on hold.
Page 101 Basic Call Features To answer a call using the hands-free speakerphone mode: Do one of the following: Press With the handset on-hook and the headset mode deactivated, tap the Answer soft key. With the handset on-hook and the headset mode deactivated, tap the line key (the line key illuminates green).
Page 102: Recent Call In Dialing
User Guide for the SIP-T48G IP Phone To redial the last dialed number from your phone: Press twice. A call to your last dialed number is attempted. To redial a previously dialed number from your phone: Press when the phone is idle.
Page 103: Auto Answer
Basic Call Features To view placed calls list when the phone is in the pre-dialing interface: Pick up the handset, press the speakerphone key or tap the line key. The touch screen displays the placed calls list. You can tap to scroll through placed calls page by page.
Page 104: Auto Redial
User Guide for the SIP-T48G IP Phone icon appears on the touch screen. Auto answer is configurable via web user interface at the path Account->Basic. Note Auto answer is only applicable when there is no other call in progress on the phone.
Page 105: Call Completion
Basic Call Features Tap the Save soft key to accept the change or to cancel. Auto redial is configurable via web user interface at the path Features->General Information. To use auto redial: When the called party is busy, the touch screen prompts the following: Tap the OK soft key to activate auto redial.
Page 106 User Guide for the SIP-T48G IP Phone Tap the On radio box of the Call Completion field. Tap the Save soft key to accept the change or to cancel. Call completion is configurable via web user interface at the path Features->General Information.
Page 107: Call Return
Basic Call Features When the called party becomes idle, the touch screen prompts the following: Tap the OK soft key to redial the number. Note Call completion is not available on all servers. For more information, contact your system administrator. You can tap a call return key to place a call back to the last incoming call.
Page 108 User Guide for the SIP-T48G IP Phone Tap the Save soft key to accept the change or to cancel. Tap the DSS Key key to return to the idle screen. Call return key is configurable via web user interface at the path DSSKey->Line key.
Page 109 Basic Call Features The touch screen indicates that the call is on hold. The phone will beep softly every 30 seconds to remind you that you still have a call on hold. To resume a held call: Press or tap the Resume soft key. Multiple Calls on Hold: If multiple calls are placed on hold, do one of the following: Tap the desired call, and then tap the Resume soft key to retrieve it.
Page 110 User Guide for the SIP-T48G IP Phone In the DND block, mark the desired radio box in the Mode field. Click Confirm to accept the change. Note DND mode is configurable via web user interface only. To activate DND in phone mode:...
Page 111 Basic Call Features Incoming calls will be rejected automatically and "n New Missed Call(s)" ("n" indicates the number of the missed calls) will appear on the touch screen. To activate DND in custom mode for a specific account: The touch screen displays a list of accounts registered on the phone. Tap the desired account.
Page 112 User Guide for the SIP-T48G IP Phone Tap the Save soft key to accept the change. icon appears on the status bar, and the associated line icon changes Incoming calls on the specific line will be rejected automatically, and the touch screen will prompt "n New Missed Call(s)"...
Page 113 Basic Call Features Incoming calls will be rejected automatically, and the touch screen will prompt "n New Missed Call(s)" ("n" indicates the number of the missed calls). Note The prompt message displays only if Missed Call Log for the line is enabled. Missed call log is configurable via web user interface at the path Account->Basic.
Page 114: Static Forwarding
User Guide for the SIP-T48G IP Phone For multiple numbers, enter a comma between every two numbers. Click Confirm to accept the change. When DND is enabled on the phone, the phone can still receive incoming calls from the numbers specified in the DND Authorized Numbers field.
Page 115: Call Forward
Basic Call Features You can enable/disable call forward for the phone system, or you can customize call forward for each or all accounts. Two call forward modes: Phone (default): Call forward is effective for the phone system.  Custom: Call forward can be configured for each or all accounts. ...
Page 116 User Guide for the SIP-T48G IP Phone the Forward To field. 3) (Optional.) Enter the always forward on code or off code respectively in the On Code or Off Code field. b.) If you tap Busy Forward: 1) Tap the On radio box of the Busy Forward field.
Page 117 Basic Call Features 5) (Optional.) Enter the no answer forward on code or off code respectively in the On Code or Off Code field. Tap the Save soft key to accept the change. icon on the idle screen indicates the call forward is enabled. To enable call forward in custom mode: ->Call Features->Call Forward or press when the phone is idle.
Page 118 User Guide for the SIP-T48G IP Phone 1) Tap the All Lines soft key. The touch screen prompts “Copy to all lines?”. 2) Tap the OK soft key to accept the change or the Cancel soft key to cancel. b.) If you select Busy Forward: 1) Tap the On radio box of the Busy Forward field.
Page 119 Basic Call Features The touch screen prompts “Copy to all lines?”. 2) Tap the OK soft key to accept the change or the Cancel soft key to cancel. c.) If you select No Answer Forward: 1) Tap the On radio box of the No Answer Forward field. 2) Enter the destination number you want to forward unanswered incoming calls to in the Forward To field.
Page 120 User Guide for the SIP-T48G IP Phone The touch screen prompts “Copy to all lines?”. 2) Tap the OK soft key to accept the change or the Cancel soft key to cancel. Tap the Save soft key to accept the change.
Page 121: Dynamic Forwarding
Basic Call Features Tap the Off radio box. Tap the Save soft key to accept the change. To disable call forward in custom mode for a specific account: ->Call Features->Call Forward or press when the phone is idle. The touch screen displays a list of accounts registered on the phone. Tap the desired account.
Page 122 User Guide for the SIP-T48G IP Phone Enter the number you want to transfer the call to. Press or tap the Transfer soft key to complete the transfer. Then the call is connected to the number to which you are transferring.
Page 123: Call Waiting
Call waiting is configurable via web user interface at the path Features->General Information. You can use SIP-T48G IP phone to create a conference with two parties using the phone’s local conference or create a conference with multiple participants called network conference.
Page 124: Local Conference
User Guide for the SIP-T48G IP Phone The SIP-T48G IP phone supports up to 3 parties (including yourself) in a conference call. This is the default method of conference called Local Conference. To set up a local conference call: Place a call to the first party.
Page 125: Network Conference
Tap the End Call soft key to drop the conference call. You can use network conference feature on the SIP-T48G IP phone to conduct a conference with multiple participants. This feature allows you to perform the following: Join two calls together into a conference call.
Page 126 User Guide for the SIP-T48G IP Phone Enter the conference URI (e.g., conference@example.com) in the Conference URI field. Click Confirm to accept the change. Note Network conference is configurable via web user interface only. To set up a network conference call: Place a call to the first party.
Page 127: Call Park
Basic Call Features You can use call park to place a call on hold, and then retrieve the call from another phone in the system (for example, a phone in another office or conference room). You can park an active call by tapping the call park key on the phone. If the call is parked successfully, the response is either a voice prompt confirming that the call was parked, or a visible prompt on the touch screen.
Page 128: Call Pickup
You can use call pickup to answer someone else’s incoming call on the phone. The SIP-T48G IP phone supports directed call pickup and group call pickup. Directed call pickup is used for picking up a call that is ringing at a specific phone number. Group call pickup is used for picking up a call that is ringing at any phone number in the group.
Page 129 Basic Call Features Enter the directed call pickup code in the Directed Call Pickup Code field. Click Confirm to accept the change. To configure the directed call pickup code on a per-line basis via web user interface: Click on Account. Select the desired account from the pull-down list of Account.
Page 130: Group Call Pickup
User Guide for the SIP-T48G IP Phone The DPickup soft key appears on the on-screen keypad. Tap the DPickup soft key on your phone when a phone receives an incoming call. Enter the phone number which receives an incoming call.
Page 131 Basic Call Features To configure the group call pickup code on a per-line basis via web user interface: Click on Account. Select the desired account from the pull-down list of Account. Click on Advanced. Enter the group call pickup code in the Group Call Pickup Code field. Click Confirm to accept the change.
Page 132: Anonymous Call
User Guide for the SIP-T48G IP Phone You can also configure a line key as a group pickup key via phone user interface or web user interface. You can pick up a call by tapping the group pickup key directly.
Page 133: Anonymous Call Rejection
Basic Call Features To place an anonymous call: Using the specific line on the phone to place a call to phone B. The touch screen of phone B prompts an incoming call from anonymity. You can use anonymous call rejection to reject incoming calls from anonymous callers. Anonymous call rejection automatically rejects incoming calls from callers who deliberately block their identities and numbers from showing up.
Page 134 User Guide for the SIP-T48G IP Phone Anonymous call rejection is configurable via web user interface at the path Account->Basic. When the phone B with anonymous call feature enabled places a call to your phone, the call will be rejected, and the touch screen of the phone B will prompts the following:...
Page 135: Advanced Phone Features
Advanced Phone Features This chapter provides operating instructions for the advanced features of the SIP-T48G IP phone. Topics include: Busy Lamp Field (BLF)  Call Recording  Hot Desking  Intercom  Multicast Paging  Music on Hold  Messages ...
Page 136 User Guide for the SIP-T48G IP Phone (Optional.) Enter the pickup code in the Extension field. 10. Tap the Save soft key to accept the change or to cancel. 11. Tap the DSS Key key to return to the idle screen.
Page 137 Advanced Phone Features Select Enabled from the pull-down list of Audio Alert for BLF Pickup. Click Confirm to accept the change. Note Visual and audio alerts are configurable via web user interface only. When the monitored line receives an incoming call, the followings occur on the phone: The phone plays a warning tone (if enabled).
Page 138: Call Recording
Click Confirm to accept the change. Note Transfer mode via DSS key is configurable via web user interface only. You can record calls by tapping a record key on the phone. The SIP-T48G IP phone supports record and URL record. Two ways of call recording: Record: The phone sends a SIP INFO message containing a specific header “Record:...
Page 139 Advanced Phone Features To configure a record key via phone user interface: Tap the DSS Key key. Tap the desired line key. Tap the gray box of the Type field. Tap Key Event from the pull-down list. Tap the gray box of the Key Event field. Tap Record from the pull-down list.
Page 140 User Guide for the SIP-T48G IP Phone Tap the Save soft key to accept the change or to cancel. Tap the DSS Key key to return to the idle screen. Record and URL record key are configurable via web user interface at the path DSSKey->Line Key.
Page 141: Hot Desking
You can use hot desking on the SIP-T48G IP phone to log out of the existing accounts and then log into a new account. As a result, many users can share the phone resource in different time.
Page 142: Intercom
User Guide for the SIP-T48G IP Phone To use hot desking: Tap the Hot Desking key when the phone is idle. The touch screen prompts the following warning: Tap the OK soft key. Registration configurations of all accounts on the phone will be cleared immediately.
Page 143: Incoming Intercom Calls
Tap the intercom key again or the End Call soft key to end the intercom call. The SIP-T48G IP phone supports to automatically answer an incoming intercom call by default. The phone automatically plays a warning tone when it receives an incoming intercom call.
Page 144 User Guide for the SIP-T48G IP Phone Intercom features you need to know: Intercom Feature Description Enable or disable the IP phone to automatically Accept Intercom answer an incoming intercom call. Enable or disable the microphone on the IP phone for Intercom Mute intercom calls.
Page 145: Multicast Paging
Advanced Phone Features Intercom Mute You can mute or un-mute the microphone on the phone for intercom calls automatically. If Intercom Mute is enabled, the microphone is muted for intercom calls. If Intercom Mute is disabled, the microphone works for intercom calls. Intercom Mute is disabled by default.
Page 146 User Guide for the SIP-T48G IP Phone The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255. Tap the Save soft key to accept the change or to cancel. 10. Tap the DSS Key key to return to the idle screen.
Page 147: Receiving Rtp Stream
Advanced Phone Features Click Confirm to accept the change. Note If G722 codec is used for multicast paging, the touch screen displays the icon indicate that is providing high definition voice. Default codec for multicast paging is configurable via web user interface only. To send RTP stream: Tap the multicast paging key when the phone is idle.
Page 148 User Guide for the SIP-T48G IP Phone Paging Barge Paging barge parameter defines the priority of the voice call in progress. If the priority of an incoming multicast paging call is lower than that of the active call, it will be ignored automatically.
Page 149: Music On Hold
Advanced Phone Features Click Confirm to accept the change. Note The priorities of listening addresses are predefined: 1 with the highest priority, 10 with the lowest. Both the multicast paging sender and the receiver play a warning tone when establishing a multicast paging call. Multicast listening addresses are configurable via web user interface only.
Page 150: Messages
Music on hold server is configurable via web user interface only. You can leave voice mails for someone else on the SIP-T48G IP phone. You can also listen to the voice mails stored in a centralized location. When receiving a new voice mail, the phone will play a warning tone, and the power indicator LED will slow flash red.
Page 151 Advanced Phone Features You can tap the 123 soft key to select the proper input mode. Tap the Save soft key to accept the change or to cancel. Note Voice mail access code must be predefined on the system server. Contact your system administrator for the more information.
Page 152: Message Waiting Indicator (Mwi)
The MWI service is unsolicited for some servers, so the SIP-T48G IP phone only handles the MWI messages sent from the server. But for other servers, the MWI service is solicited, so the SIP-T48G IP phone must enable subscription for MWI.
Page 153 Advanced Phone Features voice mail number. Note Whether the phone sends SUBSCRIBE messages for MWI service to the account or the voice number MWI service depends on the server. Contact your system administrator for more information. To configure subscribe for MWI via web user interface Click on Account.
Page 154 User Guide for the SIP-T48G IP Phone Enter the desired voice mail number in the Voice Mail field. Click Confirm to accept the change. The IP phone will subscribe to the voice mail number for MWI service using Subscribe MWI to Voice Mail.
Page 155: Troubleshooting
Troubleshooting This chapter provides general troubleshooting information to help you solve the problems you might encounter when using your SIP-T48G IP phone. If you require additional information or assistance with your new phone, contact your system administrator. Why is the touch screen blank? Ensure that the phone is properly plugged into a functional AC outlet.
Page 156 User Guide for the SIP-T48G IP Phone You can also find the MAC address from the phone’s bar code on the back of the  phone. Why can’t I get a dial tone? Check for any loose connections and that the phone has been installed properly.
Page 157 Check that the custom image is not too large or small. The phone will adjust the  image with the short side to display. Check that the picture resolution of the wallpaper. The wallpaper resolution of the  SIP-T48G IP phone is 800*480 pixels.
Page 158 User Guide for the SIP-T48G IP Phone How to change the user password? To change the user password via web user interface: Click on Security->Password. Select user from the pull-down list of User Type. Enter the new user password in the New Password field and Confirm Password field.
Page 159 Troubleshooting Select the desired value (Optional or Compulsory) from the pull-down list of RTP Encryption (SRTP). Click Confirm to accept the change. Note SRTP is not available on all servers. Contact your system administrator for more information. SRTP is configurable via web user interface only. How to reboot the phone? To reboot the phone via web user interface: Click on Settings->Upgrade.
Page 160 User Guide for the SIP-T48G IP Phone Any reboot of the phone may take a few minutes. How to export PCAP trace? We may need you to provide a PCAP trace to help analyze your problem. To export a PCAP trace via web user interface: Click on Settings->Configuration.
Page 161 Troubleshooting Click Export to open file download window, and then save the file to your local system. You can also export the system log to a syslog server, contact your system administrator for more information. Note It is recommended to reset the syslog level to 3 after exporting the system syslog. How to export/import the phone configurations? We may need you to provide the phone configurations to help analyze problem.
Page 162 User Guide for the SIP-T48G IP Phone To import the phone configurations via web user interface: Click on Settings->Configuration. Click Browse to locate a configuration file from your local system. Click Import to import the configuration file. Note The file format of configuration file must be *.bin.
Page 163 Troubleshooting Tap the Reset key. The touch screen prompts the following warning: Tap the OK soft key. The phone begins resetting. After reset, the touch screen prompts “Welcom Initializing…Please wait”.
Page 164 User Guide for the SIP-T48G IP Phone The phone will be reset to factory sucessfully after startup. Note Reset of the phone may take a few minutes. Do not power off until the phone starts up successfully.
Page 165: Regulatory Notices
Without prior written consent, no organization or individual is permitted to  make any change to the structure or the safety design of the device. Yealink is under no circumstance liable to consequences or legal issues caused by such changes.
Page 166 User Guide for the SIP-T48G IP Phone Keep the device dry and free of dusts.  Place the device on a stable and level platform.  Please place no heavy objects on the device in case of damageand  deformation caused by the heavy load.
Page 167: Appendix A - Time Zones
Appendix A-Time Zones Time Zone Time Zone Name −11:00 Samoa −10:00 United States-Hawaii-Aleutian −10:00 United States-Alaska-Aleutian −09:00 United States-Alaska Time −08:00 Canada(Vancouver, Whitehorse) −08:00 Mexico(Tijuana, Mexicali) −08:00 United States-Pacific Time −07:00 Canada(Edmonton, Calgary) −07:00 Mexico(Mazatlan, Chihuahua) −07:00 United States-Mountain Time −07:00 United States-MST no DST −06:00...
Page 168 User Guide for the SIP-T48G IP Phone Time Zone Time Zone Name +01:00 Germany(Berlin) +01:00 Hungary(Budapest) +01:00 Italy(Rome) +01:00 Luxembourg(Luxembourg) +01:00 Macedonia(Skopje) +01:00 Netherlands(Amsterdam) +01:00 Namibia(Windhoek) +02:00 Estonia(Tallinn) +02:00 Finland(Helsinki) +02:00 Gaza Strip(Gaza) +02:00 Greece(Athens) +02:00 Israel(Tel Aviv) +02:00 Jordan(Amman)
Page 169: Limitations Of Liability
Index Editing Contacts About This Guide Ending Calls Account Management Account Registration Adding Contacts Administrator password General Settings Anonymous Call Getting Started Anonymous Call Rejection Answering Calls Area Code Hardware Component Instructions Attaching Stand Headset Use Audio Settings Headset Mode Activation/Deactivation Auto Answer Auto Redial Hotline...
Page 170 User Guide for the SIP-T48G IP Phone Phone User Interface Placing Calls Placing Calls to Contacts Programmable Keys Outgoing Intercom Calls Overview Recent Call In Dialing Redialing Numbers Registration Regulatory Notices Remote Phone Book Replace Rule Ring Tones Safety Instructions...

Yealink SIP-T48G User Manual

Table of Contents

Overview

Getting Started

Customizing Your Phone

Basic Call Features

Advanced Phone Features

Troubleshooting

Regulatory Notices

Appendix A-Time Zones

Index

Quick Links

Need help?

Questions and answers

Related Manuals for Yealink SIP-T48G

Summary of Contents for Yealink SIP-T48G

Table of Contents