Page 2 Copyright © 2016 YEALINK(XIAMEN) NETWORK TECHNOLOGY CO., LTD Copyright © 2016 Yealink(Xiamen) 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(Xiamen) 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...
Page 5: About This Guide
About This Guide Thank you for choosing the SIP-T48G IP phone, an ultra-elegant Gigabit IP phone which is exquisitely designed to provide business telephony features, such as Call Hold, Call Transfer, Busy Lamp Field, Call Recording, Multicast Paging and Conference over an IP network.
Page 6 User Guide for the SIP-T48G IP Phone Major updates have occurred to the following sections: Icon Instructions on page  Volume on page  Ring Tones on page  DSS Keys on page  Call Park on page  Display Issues on page ...
Page 7 About This Guide The following section is new: Phone Lock on page  Emergency Number on page  Short Message Service (SMS) on page  Major updates have occurred to the following sections: Icon Instructions on page  User Interfaces on page ...
Page 8 User Guide for the SIP-T48G IP Phone Major updates have occurred to the following sections: Documentations on page  Packaging Contents on page  Phone Installation on page  Contact Management on page  Placing Calls on page  viii...
Page 9: Table Of Contents
Table of Contents About This Guide ............. v In This Guide ....................... v Summary of Changes ....................v Changes for Release 80, Guide Version 80.130 ............v Changes for Release 80, Guide Version 80.95 ............vi Changes for Release 80, Guide Version 80.80 ............vi Changes for Release 80, Guide Version 80.60 ............
Page 10 User Guide for the SIP-T48G IP Phone General Settings ...................... 31 Wallpaper ........................31 Screen Saver ......................33 Power Saving ......................35 Backlight ........................38 Contrast ........................39 Language ........................39 Time & Date ....................... 40 Administrator Password ................... 43 Key as Send ......................
Page 11: Table Of Contents
Table of Contents Call Forward ......................140 Call Transfer ......................149 Call Waiting ......................151 Conference ......................152 Local Conference ....................152 Network Conference ....................153 Call Park ........................155 FAC Mode ....................... 155 Transfer Mode ......................158 Call Pickup ....................... 160 Anonymous Call .....................
Page 12 User Guide for the SIP-T48G IP Phone Call Issues ....................... 223 Headset & Handset Issues ..................223 Audio Issues ......................224 Log Issues ........................ 226 Reboot & Upgrade & Reset Issues ................ 229 Regulatory Notices ............233 Service Agreements ....................233 Limitations of Liability .....................
Page 13: 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 14 User Guide for the SIP-T48G IP Phone Hardware component instructions of the SIP-T48G IP phone are: Item Description Indicates phone power and some feature statuses. ① Power Indicator LED • Receives an incoming call—Fast flashing • Receives a voice mail or text message—Slow flashing The screen is touch-sensitive.
Page 15 Overview Item Description phone disconnects from the line. Icons appearing on the touch screen are described in the following table: Icons Description Network is unavailable The private line registers successfully Register failed Registering (Flashing) The shared/bridged line registers successfully Hands-free speakerphone mode Handset mode Headset mode Voice Mail...
Page 16 User Guide for the SIP-T48G IP Phone Placed Calls Missed Calls Call Forward Forwarded Calls Recording box is full 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...
Page 17 Overview Icons Description Group Pickup Call Park Park successfully Call Park idle state Park failed Call park ringing state Retrieve park Intercom DTMF Prefix Local Group XML Group XML Browser LDAP Conference Forward Transfer Hold ReCall Record URL Record Recording starts successfully (Record/URL Record) Multicast Paging Group Listening Paging List...
Page 18 User Guide for the SIP-T48G IP Phone Icons Description Hot Desking Zero Touch Phone Lock Directory Speed Dial Icon indicator (associated with BLF/BLF List) Icons Description BLF/BLF list idle state BLF/BLF list ringing state (Flashing) BLF/BLF list callout state (Flashing)
Page 19 Overview Icon Description (Flashing) The shared line is dialing. (Flashing) The shared line is in conversation. The shared line conversation is placed on public hold. (for local SCA phone) The shared line conversation is placed on private hold. (for monitoring SCA phone) The shared line conversation is barged in by the other shared line party.
Page 20 LED is configurable via web user interface. For more information, refer to Yealink_SIP-T2_Series_T19(P) E2_T4_CP860_Series_IP_Phones_Administrator_Guide. 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.
Page 21 Overview In addition to the phone user interface, you can also customize your phone via web user interface. In order to access the web user interface, you need to know the IP address of your new phone. To obtain the IP address, press the OK key on the phone when the phone is idle.
Page 22 User Guide for the SIP-T48G IP Phone Options Phone User Interface Web User Interface --Emergency Number × --Live Dialpad × --Hotline √ Basic Call Features --Recent Call In Dialing × --Auto Answer √ --Auto Redial √ --Call Completion √ --ReCall √...
Page 23: Phone User Interface
--NAT Status √ 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 Basic call features...
Page 24 User Guide for the SIP-T48G IP Phone...
Page 25: 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 26 Ethernet Cable  Quick Start Guide  Check the list before installation. If you find anything missing, contact your system administrator. The following items are optional accessories for your SIP-T48G IP phone. You need to purchase them separately if required.
Page 27 Getting Started Wall Mount Bracket  Power Adapter  Headset  Wireless Headset Adapter EHS36  Bluetooth USB Dongle BT40 ...
Page 28 User Guide for the SIP-T48G IP Phone Wi-Fi USB Dongle WF40  Note We recommend that you use the accessories provided or approved by Yealink. The use of unapproved third-party accessories may result in reduced performance. If your phone is already installed, proceed to Phone Initialization on page 19.
Page 29 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 Yealink IP Phones wall, refer to...
Page 30: Power Over Ethernet
Connect the included or a standard Ethernet cable between the Internet port on the phone and the one on the wall or switch/hub device port. The IP phone should be used with Yealink original power adapter (5V/2A) only. The use of Note the third-party power adapter may cause the damage to the phone.
Page 31 Getting Started 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. Note If in-line power is provided, you don’t need to connect the phone to the power adapter. Make sure the switch/hub is PoE-compliant.
Page 32 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 (IPv4 address, MAC address and firmware version)  Network status (e.g., IPv4 status, IP mode and MAC address) ...
Page 33 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 34 User Guide for the SIP-T48G IP Phone Tap the gray box of the IP Mode field, and then select 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.
Page 35 Getting Started Tap the gray box of the Type field, and then select Static IP from the pull-down list. Enter the desired value in the IP Address, IPv6 IP Prefix, Gateway, Primary DNS and Secondary DNS field respectively. Tap the Save soft key to accept the change or to cancel.
Page 36 The SIP-T48G IP phone supports up to 16 accounts. If your phone is not registered, you may have to register it.
Page 37 Getting Started Name Description more information, refer to the default account on page 109. Icons are displayed in the middle of the status bar. Icons For more information, refer to Icon Instructions on page 3. The phone’s time and date are displayed in the Time and Date right of the status bar.
Page 38 User Guide for the SIP-T48G IP Phone Configuration Screen Display Name Description Screen Title Area Displays the title of the current menu screen. Displays various operation options for Operation Option Area different menu screens. Displays menu items. Menu Tree Area Tap the desired menu item to enter the corresponding feature configuration screen.
Page 39 Getting Started To operate your phone, follow these tips: If you want to Action Enter the main menu. Return to the idle screen. Go back to the previous menu. or press Tap the item. Select an item. Scroll to the item by pressing (If you are in the call history, local directory, Scroll through items page by language configuration screen or ring tones...
Page 40 User Guide for the SIP-T48G IP Phone Input Mode Keypad (initials in capitals) def3èéêë def3èéêë DEF3ÈÉÊË 3defDEF ð ð Ð 4ghiGHI ghi4ì í î ï ghi4ì í î ï GHI4Ì Í Î Ï 5jklJKL jkl5£ jkl5£ JKL5£ 6mnoMN mno6öøò mno6öøò...
Page 41 Getting Started If you want to Then you can switch among uppercase (ABC), numeric (123), alphanumeric (2aB), uppercase and lowercase (Abc) and lowercase (abc) input modes. For example, if the input mode is ABC: To enter ―A‖, press once. To enter ―B‖, press twice quickly.
Page 42 User Guide for the SIP-T48G IP Phone If you want to Then you can Swipe your finger to the left or right to select Delete an entire field of the entire field of data, so that the data is data.
Page 43 You can customize the wallpaper of the SIP-T48G IP phone, and can change the wallpaper image via phone user interface or web user interface. You can also upload custom wallpaper images via web user interface. The SIP-T48G IP phones support the file format of wallpaper image in the following table: Wallpaper Format...
Page 44 The custom wallpaper appears in the pull-down list of Wallpaper. Note The SIP-T48G IP phone screen size is 800*480 pixels. If the size of the custom wallpaper doesn’t meet the IP phone screen size, the wallpaper will be stretched or/and zoomed...
Page 45 If your phone is idle again for a specified period of time, the screen saver will start again. You can configure the screen saver of SIP-T48G IP phone, and upload custom pictures to set up a screen saver of your picture via web user interface. You can only configure the screen saver wait time via phone user interface.
Page 46 User Guide for the SIP-T48G IP Phone The web user interface prompts ―Upload success!‖. The custom picture appears in Screensaver list. The first picture in the list is System.jpg. You can only delete the custom picture by clicking Del in the Screensaver field.
Page 47 Customizing Your Phone The IP phone will automatically set System.jpg as the screen saver. - If you select Upload Picture. The IP phone will automatically set the custom pictures you upload as the screen saver, and display these pictures alternately. Click Confirm to accept the change.
Page 48 User Guide for the SIP-T48G IP Phone Select Enabled from the pull-down list of Power Saving. Click Confirm to accept the change. Office Hour specifies the starting time and ending time in the office each day. To configure the office hour via web user interface: Click on Settings->Power Saving.
Page 49 Customizing Your Phone Click Confirm to accept the change. Idle Timeout specifies the period of time before the IP phone enters power-saving mode. The following three types of idle timeout you can configure: Office Hours Idle Timeout: Configures the idle timeout for office hours. ...
Page 50 15s, 30s, 60s, 120s, 300s, 600s or 1800s: Backlight is changed when the phone is  inactive after the designated time (in seconds). You can also change the intensity of the LCD screen of EXP40 connected to the SIP-T48G IP phone. To configure the backlight via phone user interface: ->Basic->Display->Backlight.
Page 51 You can only 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. The intensity of contrast ranges from 1 to 10 and the highest intensity is 10.
Page 52 User Guide for the SIP-T48G IP 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.
Page 53 Customizing Your Phone time and date manually. If the phone cannot obtain the time and date from the Simple Network Time Protocol (SNTP) server, contact your system administrator for more information. To configure the SNTP setting via phone user interface: ->Basic->Time &...
Page 54 User Guide for the SIP-T48G IP 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 55 Customizing Your Phone Tap the gray box of the Time Format field, and then select 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 56 User Guide for the SIP-T48G IP Phone Tap the Save soft key to accept the change or to cancel. Administrator password is configurable via web user interface at the path Security->Password. You can set the ―#‖ key or ―*‖ key to perform as a send key while dialing.
Page 57 Customizing Your Phone To activate the phone lock via phone user interface: ->Advanced (default password: admin) ->Phone Lock. Tap the gray box of the Lock Enable field, and then select Enabled from the pull-down list to enable this feature. Enter the desired interval of automatic phone lock in the Lock Time Out field. The default timeout is 0.
Page 58 User Guide for the SIP-T48G IP Phone Enter the desired value in the Current PIN, New PIN and Confirm PIN field respectively. Tap the Save soft key to accept the change or to cancel. Note The unlock PIN length must be within 15 digits.
Page 59 Customizing Your Phone To deactivate the phone lock via phone user interface: ->Advanced (default password: admin) ->Phone Lock. Tap the gray box of the Lock Enable field, and then select Disabled from the pull-down list to disable this feature. Tap the Save soft key to accept the change. Phone lock is configurable via web user interface at the path Features->Phone Lock.
Page 60 User Guide for the SIP-T48G IP Phone To adjust the ringer volume: When the phone is idle: Press to adjust the ringer volume. When the phone is ringing: Press to adjust the ringer volume. You can also press to adjust the ringer volume when selecting a ring tone. For...
Page 61 Customizing Your Phone To adjust the volume when the phone is during a call: Press to adjust the volume of currently engaged audio device (handset, speakerphone or headset). Ring tones are used to indicate incoming calls. You can select different ring tones to distinguish different accounts registered on your phone, or to distinguish your phone from your neighbor’s.
Page 62 User Guide for the SIP-T48G IP Phone To select a ring tone for the account via phone user interface: ->Basic->Sound->Ring Tones. Tap the desired account. Tap the desired ring tone. If Common is selected, this account will use the ring tone selected for the phone.
Page 63 Customizing Your Phone Click Upload to upload the file. Note The priority of ring tone for an incoming call on the phone is as follows: Contact ring tone (refer to Adding Groups) >Group ring tone (refer to Adding Groups) >Account ring tone >Phone ring tone. Single custom ring tone file must be within 8MB and total custom ring tone files must be within 20MB.
Page 64 User Guide for the SIP-T48G IP Phone To adjust the display order of the enabled lists, select the desired list and then click Click Confirm to accept the change. Note Directory is configurable via web user interface only. If the remote phone book and LDAP are not configured in advance, you cannot view remote phone book and LDAP lists on the phone user interface.
Page 65 Customizing Your Phone If more than one list is enabled for the directory, tap the desired list you want to view, and then tap OK. The built-in phone directory can store the names and phone numbers of your contacts. You can store up to 1000 contacts and 48 groups in your phone's local directory. You can add new groups and contacts, edit, delete or search for a contact, or simply dial a contact number from the local directory.
Page 66 User Guide for the SIP-T48G IP 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, this group will use the ring tone according to the priority: Contact...
Page 67 Customizing Your Phone To edit a group in the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default. If Local Directory is removed from the directory (refer to Directory on page 51), tap ->Directory->All Contacts to enter the local directory.
Page 68 User Guide for the SIP-T48G IP Phone To delete a group from the local directory: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default. If Local Directory is removed from the directory (refer to...
Page 69: Adding Contacts Manually
Customizing Your Phone You can add contacts to the local directory in one of the following ways: Manually  From call history  From a 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 enabled in the directory by default.
Page 70 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, and then select the desired account from the pull-down list. If Auto is selected, the phone will use the default account when placing calls to the contact from the local directory.
Page 71 Customizing Your Phone after the desired entry. Tap Add. Edit the corresponding fields. Tap the Save soft key to accept the change. The entry is successfully saved to the local directory. Adding Contacts from a remote phone book To add a contact to the local directory from a remote phone book: ->Directory->Remote Phone Book.
Page 72 User Guide for the SIP-T48G IP Phone If Remote Phone Book is added to the directory (refer to Directory on page 51), tap ->Remote Phone Book to enter the remote phone book. Tap the desired remote phone book. The phone then connects to the remote phone book and proceeds to load it. The contacts in the remote phone book are displayed on the touch screen.
Page 73 Customizing Your Phone Edit the corresponding fields. Tap the Save soft key to save the contact to the local directory. If the contact already exists in the local directory, the touch screen will prompt "Overwrite the original contact?". Tap OK to overwrite the original contact in the local directory or Cancel to cancel.
Page 74 User Guide for the SIP-T48G IP Phone If the contact was added to a specified contact group, you can tap the contact group first, and then tap after the desired contact. Tap the desired field to edit the contact information.
Page 75 Customizing Your Phone Tap Delete. The touch screen prompts the following warning: Tap OK to confirm the deletion or Cancel to cancel. To delete all contacts: The IP phone enters the local directory directly as there is only Local Directory enabled in the directory by default.
Page 76 User Guide for the SIP-T48G IP Phone The touch screen prompts the following warning: Tap OK to confirm the deletion or Cancel to cancel. To upload a new custom photo for a contact via web user interface: Click on Directory->Local Directory.
Page 77 Customizing Your Phone To change the custom photo for the contact via web user interface: Click on Directory->Local Directory. Click the desired entry you want to edit. Select the desired photo from the pull-down list of Photo. Click Edit to accept the change. When you place a call to the contact or receive a call from the contact, the touch screen will display the contact photo.
Page 78 User Guide for the SIP-T48G IP Phone Tap the desired contact. If the contact was added to a specified contact group, you can tap the contact group first, and then tap the desired contact. If only one number for the contact is stored in the local directory, the contact number will be dialed out.
Page 79 Customizing Your Phone ->Directory->All Contacts to enter the local directory. Tap Search. Enter a few continuous characters of the contact name or continuous numbers of the contact number (office, mobile or other number) using the keypad. The contacts whose name or phone number matches the characters entered will appear on the touch screen.
Page 80 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 search results in the adjusted order. Note Search source list in dialing is configurable via web user interface only.
Page 81 Customizing Your Phone You can tap the desired entry to place a call to the entry. 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 contact list file via web user interface: Click on Directory->Local Directory.
Page 82 User Guide for the SIP-T48G IP Phone Click OK to complete importing the contact list. To import a CSV contact list file via web user interface: Click on Directory->Local Directory. Click Browse to locate a contact list file (the file format must be *.csv) from your local system.
Page 83 Customizing Your Phone At least one item should be selected to be imported into the local directory. Click Import to complete importing the contact list. 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.
Page 84 User Guide for the SIP-T48G IP Phone Tap Add. Enter the contact’s name and the office, mobile or other numbers in the corresponding fields. Tap the gray box of the Account field, and then select the desired account from the pull-down list.
Page 85 Customizing Your Phone group first, and then tap after the desired contact. Tap Blacklist. The touch screen prompts the following warning: Tap OK to accept the change or Cancel to cancel. For operating instructions on editing, deleting, placing calls to and/or searching for contacts in the blacklist directory, refer to the operating instructions of Local Directory page 53.
Page 86 User Guide for the SIP-T48G IP Phone Enter the name in the Display Name field. Click Confirm to accept the change. Note An access URL for a remote phone book is configurable via web user interface only. If you want to tap to enter the remote phone book, you should enable remote phone book in the directory lists in advance.
Page 87 Customizing Your Phone You can tap to back to the previous interface. To place a call from the remote phone book: ->Directory->Remote Phone Book. If Remote Phone Book is added to the directory (refer to Directory on page 51), tap ->Remote Phone Book to enter the remote phone book.
Page 88 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 list supports up to 400 entries. You can view call history, place a call, add a contact or delete an entry from the call history list.
Page 89 Customizing Your Phone Tap the Off radio box in the History Record field. Tap the Save soft key to accept the change or to cancel. To view call history: The touch screen displays all call records. to turn pages. You can also press to switch pages.
Page 90 User Guide for the SIP-T48G IP Phone You can also press to switch pages. You can tap Missed Calls, Placed Calls, Received Calls or Forwarded Calls to view entries in each call list directly. Tap the desired entry. To add a contact to the blacklist directory from the call history list: The touch screen displays all call records.
Page 91 Customizing Your Phone To delete an entry 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 Calls, Placed Calls, Received Calls or Forwarded Calls to view entries in each call list directly.
Page 92 User Guide for the SIP-T48G IP Phone Tap the checkbox of Select All. Tap Delete. The touch screen prompts the following warning: Tap OK to confirm the deletion or Cancel to cancel. If you want to use a wired headset, physically connect your headset to the phone and activate the headset mode for use.
Page 93 Customizing Your Phone This section provides an introduction to wired headset use. Note If both a Bluetooth headset and a wired headset are connected, only the Bluetooth headset can be used. To activate the headset mode: Press on the phone. The HEADSET key LED illuminates solid green, and the icon appears on the status bar of the touch screen when the headset mode is activated.
Page 94 User Guide for the SIP-T48G IP Phone Select Enabled from the pull-down list of Headset Prior. Click Confirm to accept the change. To use headset prior, you should activate the headset mode in advance: Physically connect the headset. Press to activate the headset mode.
Page 95 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 feet) range.
Page 96 User Guide for the SIP-T48G IP Phone Tap the On radio box in the Bluetooth field. The IP phone scans the available Bluetooth headset automatically. The touch screen displays the Bluetooth device information (device name and MAC address). Before you pair a Bluetooth headset, check the indicator on the Bluetooth headset to make sure that the Bluetooth headset is discoverable.
Page 97 Customizing Your Phone When you insert Bluetooth USB dongle BT40 into the USB port on the back of the phone, the touch screen prompts ―Adapter has been added, scanning the Bluetooth devices right now?‖. You can tap OK to activate Bluetooth mode directly and then scan Bluetooth devices automatically.
Page 98 User Guide for the SIP-T48G IP Phone Enter the PIN in the prompted Password field. The default PIN is ―0000‖. Tap the OK soft key. The Bluetooth headset is then automatically connected to your phone. The touch screen displays as below: The Bluetooth icon appears on the touch screen.
Page 99 Customizing Your Phone 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. To view the Bluetooth headset information: ->Basic->Bluetooth. Tap the On radio box in the Bluetooth field.
Page 100 User Guide for the SIP-T48G IP Phone Enter the desired name in the Device Name field. The default device name is ―Yealink-T48G‖. Tap the Save soft key to accept the change or to cancel. The preconfigured Bluetooth device name will display in scanning list of other device.
Page 101 Customizing Your Phone To delete your Bluetooth headset from your phone: ->Basic->Bluetooth. after the Bluetooth headset you want to delete. The touch screen prompts the following warning ―Delete selected item?‖. Tap OK to confirm the deletion or Cancel to cancel. You can also delete all headsets by tapping the Delete All soft key.
Page 102 User Guide for the SIP-T48G IP Phone Wi-Fi is a popular wireless networking technology that uses radio waves to provide wireless high-speed Internet and network connections. You can activate/deactivate the Wi-Fi mode on the IP phone, and then connect your phone to the desired wireless network.
Page 103 Customizing Your Phone To manually connect to a wireless network via phone user interface: ->Basic->Wi-Fi. Tap the available wireless network to connect to your phone. If there is no wireless network available on the touch screen, tap the Scan soft key to search for the wireless network again.
Page 104 User Guide for the SIP-T48G IP Phone Tap OK. Once the connection has completed successfully, the prompt ―Connect Success.‖ appears at the end of the SSID. The Wi-Fi icon appears on the touch screen. Note wireless network For more information on the password of the , contact your system administrator.
Page 105 Customizing Your Phone Tap the On radio box in the Wi-Fi field. The IP phone scans the available wireless network in your area. Tap the WPS soft key. The touch screen prompts ―WPS has opened, please connect in 120s.‖. Long press the WPS key on your gateway/router. Once WPS setup has completed successfully, the touch screen will prompt ―Connect Success.‖.
Page 106 User Guide for the SIP-T48G IP Phone To connect to a hidden wireless network via phone user interface: ->Basic->Wi-Fi. Tap the Add soft key. Use the WLAN settings obtained from your gateway/router to configure this WLAN Profile on the IP phone. Do the following: If you select None or WEP from the pull-down list of Security Mode: Enter the profile name, SSID, WPA shared key in the corresponding fields.
Page 107 There are three types of DSS keys: Line Keys, Programable Keys and Ext Keys. Details will be introduced in the following. The SIP-T48G IP phone supports 29 line keys and 13 programable keys. For more information on DSS key icon indicators, refer to...
Page 108 User Guide for the SIP-T48G IP Phone (Optional.) Enter the corresponding value in the Value field. (Optional.) Enter the corresponding value in the Extension field. Tap the Save soft key to accept the change or to cancel. You can also tap DSS Key on the idle screen, and then tap the desired line key to assign functionality to it.
Page 109 Customizing Your Phone The following figure shows an example of label display when the label length feature is disabled: To configure the label length via web user interface: Click on DSSKey->Line Key. Select Extended from the pull-down list of Label Length. Click Confirm to accept the change.
Page 110 User Guide for the SIP-T48G IP Phone Group Pickup  Call Park  DTMF  Prefix  Local Group  XML Group  XML Browser  LDAP   Conference  Forward  Transfer  Hold   Group Listening ...
Page 111 Customizing Your Phone 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 112 User Guide for the SIP-T48G IP Phone Call Park You can use this key feature to park a call. Type (Key Event) Dependencies: Key Type (Call Park) Account ID (the account this feature will be applied to) Label (key label displayed on the LCD screen) Value (the call park code/call park number) Usage: Tap the DSS key on your phone to park a call.
Page 113 Customizing Your Phone more information, refer to Local Directory on page 53. Type (Key Event) Dependencies: Key Type (Local Group) Local Group (the contact group name you want to access) Label (key label displayed on the touch screen) Usage: Tap the local group key to access the contact group specified in the Local Group field.
Page 114 User Guide for the SIP-T48G IP Phone The contacts whose name or phone number matches the characters entered will appear on the touch screen. You can use this key feature to quickly access text message. For more information, refer Short Message Service (SMS) on page 213.
Page 115 Customizing Your Phone Type (Key Event) Dependencies: Key Type (Transfer) Label (key label displayed on the touch screen) Value (the number you want to transfer to) Usage: When the transfer mode on DSS key is Blind Transfer, tap the transfer key to ...
Page 116 User Guide for the SIP-T48G IP Phone Tap the DND key again to deactivate DND. When DND is in custom mode: Tap the DND key to access the custom DND screen. You can activate or deactivate DND for one or all accounts.
Page 117 Customizing Your Phone Usage: Tap the URL key to trigger the phone to send an HTTP GET request containing the URL specified in the URL field. Phone Lock You can use this key feature to immediately lock your phone instead of long pressing .
Page 118 User Guide for the SIP-T48G IP Phone Customize specific features for these keys. (Optional.) Enter the string that will appear on the touch screen in the Label field. Label is configurable only when customizing SoftKey (1-4). Click Confirm to accept the change.
Page 119 Note Ext 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 120 User Guide for the SIP-T48G IP Phone If you use the outbound proxy servers, do the following: Tap the gray box of the Outbound Status field, and then select Enabled from the pull-down list. Enter the desired value in the Outbound Proxy1/2 and Proxy Fallback Interval field respectively.
Page 121 Customizing Your Phone Tap the Save soft key to accept the change or to cancel. Account registration is configurable via web user interface at the path Account->Register. To configure the default account via phone user interface: ->Features->Default Account. Tap the gray box of the Default Account field, and then select the desired account from the pull-down list.
Page 122 Your phone can be configured to have a combination of accounts with a single line key and accounts with multiple line keys. 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...
Page 123 Customizing Your Phone Basic expression syntaxes you need to know: The dot "." can be used as a placeholder or multiple placeholders for any character. Example: "12." would match "123", "1234", "12345", "12abc", etc. An "x" can be used as a placeholder for any character. Example: "12x"...
Page 124 User Guide for the SIP-T48G IP Phone Enter the desired line ID in the Account field or leave it blank. Click Add to add the replace rule. When you enter the number ―1‖ using the keypad and then tap Send, the phone will dial out ―1234‖...
Page 125 Customizing Your Phone For example, a dial-now rule is configured as "2xx", any entered three-digit string beginning with 2 will then be dialed out automatically on the phone. To add a dial-now rule via web user interface: Click on Settings->Dial Plan->Dial-now. Enter the desired value (e.g., 2xx) in the Rule field.
Page 126 User Guide for the SIP-T48G IP Phone Enter the time between 0 and 14 (seconds) in the Time-Out for Dial-Now Rule field. The default value is ―1‖. Click Confirm to accept the change. Note Delay time for dial-now rule is configurable via web user interface only.
Page 127 Customizing Your Phone For more information on the valid values for the Account field, refer to Replace Rule on page 111. Click Confirm to accept the change. Note The default value of minimum and maximum length is 1 and 15 respectively. You can block some specific numbers (up to 10) from being dialed on your phone.
Page 128 User Guide for the SIP-T48G IP Phone For more information on the valid values for the Account field, refer to Replace Rule on page 111. Click Confirm to add the block out number. Note Block out number is configurable via web user interface only.
Page 129 Note Emergency number is configurable via web user interface only. You can enable live dialpad feature on the SIP-T48G IP phone, which enables the IP phone to automatically dial out a phone number without pressing the send key. You can also configure a delay, and then the phone will dial out the phone number automatically after the designated period of time.
Page 130 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 131 Customizing Your Phone Enter the desired delay time in the Hotline Delay field. The valid values range from 0 to 10 (seconds) and the default value is ―4‖. Tap the Save soft key to accept the change or to cancel. Hotline is configurable via web user interface at the path Features->General Information.
Page 132 User Guide for the SIP-T48G IP Phone...
Page 133 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 134 User Guide for the SIP-T48G IP Phone You can place a call in one of 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 135 Basic Call Features You can enter the number using the keypad displayed on the touch screen. Press , or tap Send. The # key is configured as a send key by default. You can also set the * key as the send key, or set neither.
Page 136 IP phone can handle a maximum of 50 calls at one time. 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.
Page 137 Basic Call Features Answering When Not in Another Call Call duration and destination will always appear on the touch screen for the active call. To answer a call using the handset: Pick up the handset. 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...
Page 138 User Guide for the SIP-T48G IP Phone To end a call: Do one of the following: If you are using the handset, press , the EndCall soft key or hang up the handset. If you are using the headset, press or the EndCall soft key.
Page 139 Basic Call Features Select Enabled from the pull-down list of Recent Call In Dialing. Click Confirm to accept the change. Note Recent call in dialing is configurable via web user interface only. To view placed calls list when the phone is on the dialing interface: Pick up the handset, press the Speakerphone key or tap the line key.
Page 140 User Guide for the SIP-T48G IP Phone You can also enter a few continuous characters of the contact name or continuous numbers of the contact number (office, mobile or other number) to search from placed calls list. You can use auto answer feature to automatically answer an incoming call on a line.
Page 141 Basic Call Features 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. You can enable auto redial to automatically redial a phone number when the called party is busy.
Page 142 User Guide for the SIP-T48G IP Phone The default value is ―10‖. 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:...
Page 143 Basic Call Features The touch screen prompts the following: Wait for the designated period of time or tap the OK soft key to redial the phone number. The phone will retry as many times as configured until the called party is idle. You can use call completion to notify the caller who failed to reach a desired party when the party becomes available to receive a call.
Page 144 User Guide for the SIP-T48G IP Phone To use call completion: When the called party is busy, the following prompt will appear on the touch screen of the phone: Tap OK, the phone will then returns to the idle screen and call completion will be activated.
Page 145 Basic Call Features To configure a recall key via phone user interface: Tap DSS Key. Tap the desired line key. Tap the gray box of the Type field, and then select Key Event from the pull-down list. Tap the gray box of the Key Type field, and then select ReCall from the pull-down list.
Page 146 User Guide for the SIP-T48G IP Phone The touch screen indicates that the call is muted. The mute key LED illuminates solid red when the call is muted. To un-mute a call: Press again to un-mute the call. You can place an active call on hold. Only one active call can be in progress on the phone at any time.
Page 147 Basic Call Features 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 press or tap the Resume soft key to retrieve it. Tap the desired call, and then tap the corresponding line key to retrieve it.
Page 148 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: icon on the status bar indicates that DND is enabled.
Page 149 Basic Call Features 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. Tap the On radio box in the DND Enable field. Tap the Save soft key to accept the change. If you activate DND for the default account, the associated line icon will change , and the icon will appear on the status bar.
Page 150 User Guide for the SIP-T48G IP Phone Incoming calls on the specific line will be rejected automatically, and the touch screen will prompt ―n New Missed Call(s)‖ (―n‖ indicates the number of missed calls. e.g., 1 New Missed Call(s)). Note When DND and busy forward are enabled for a specific account, calls from the specific account will be sent to the configured destination number.
Page 151 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. e.g., 1 New Missed Call(s)). To configure the DND authorized numbers via web user interface: Click on Features->Forward &...
Page 152 User Guide for the SIP-T48G IP Phone When DND is enabled on the phone, the phone can still receive incoming calls from the numbers specified in the DND Authorized Numbers field. Note DND authorized number is configurable via web user interface only.
Page 153 Basic Call Features In the Forward block, mark the desired radio box in the Mode field. Click Confirm to accept the change. Note Call forward mode is configurable via web user interface only. To enable call forward in phone mode: ->Features->Call Forward or press when the phone is idle.
Page 154 User Guide for the SIP-T48G IP Phone (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: Tap the On radio box in the Busy Forward field.
Page 155 Basic Call Features (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 that the call forward is enabled. To enable call forward in custom mode: ->Features->Call Forward or press when the phone is idle.
Page 156 User Guide for the SIP-T48G IP Phone (Optional.) Enter the always forward on code or off code respectively in the On Code or Off Code field. You can also enable always forward for all accounts. Do the following: Tap the All Lines soft key.
Page 157 Basic Call Features (Optional.) Enter the busy forward on code or off code respectively in the On Code or Off Code field. You can also enable busy forward for all accounts. Do the following: Tap the All Lines soft key. The touch screen prompts ―Copy to all lines?‖.
Page 158 User Guide for the SIP-T48G IP Phone (Optional.) Enter the no answer forward on code or off code respectively in the On Code or Off Code field. You can also enable no answer forward for all accounts. Do the following: Tap the All Lines soft key.
Page 159 Basic Call Features If you activate call forward for the default account, the associated line icon will change to , and the icon will appear on the status bar. If you activate call forward for the non-default account, only the associated line icon will change to Call forward is configurable via web user interface at the path Features->Forward &...
Page 160 User Guide for the SIP-T48G IP Phone Enter the numbers in the Forward Authorized Numbers field. For multiple numbers, enter a comma between every two numbers. Click Confirm to accept the change. When call forward is enabled on the phone, the phone cannot forward incoming calls from the numbers specified in the Forward Authorized Numbers field.
Page 161 Basic Call Features Tap the Off radio box. Tap the Save soft key to accept the change. Dynamic Forwarding To forward an incoming call to another party: When the phone is ringing, tap FWD. Enter the number you want to forward the incoming call to. Press , or tap FWD.
Page 162 User Guide for the SIP-T48G IP Phone Enter the number you want to transfer the call to. Press or tap Transfer to complete the transfer. The call is then connected to the number to which you are transferring. To perform a semi-attended transfer: Press or tap the Transfer soft key during a call.
Page 163 Basic Call Features Tap the History soft key, and then tap the desired list. Tap the desired entry to dial out. Tap the Directory soft key, and then tap Remote Phone Book. Search for the contact and tap the desired contact to dial out. (Directory and remote phone book should be configured in advance.
Page 164 User Guide for the SIP-T48G IP Phone You can use the SIP-T48G IP phone to create a conference with other two parties using the phone’s local conference or create a conference with multiple participants which is called network conference. Note Network conference is not available on all servers.
Page 165 Tap the EndCall 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 166 User Guide for the SIP-T48G IP Phone Select Network Conference from the pull-down list of Conference Type. 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.
Page 167 Basic Call Features You can use call park feature 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 Park soft key or call park key (if configured) on the phone.
Page 168 User Guide for the SIP-T48G IP Phone (Optional.) Enter the call park code in the Call Park Code field. It is configured for the Park soft key. This call park code will also apply to the call park key. For more information, refer to Do Not Disturb (DND) on page 135.
Page 169 Basic Call Features Press or tap Park. If the call park code is configured, the phone will dial the configured call park code shown as below: Do one of the following: If you want to park the call against the local extension. Press If the call is parked successfully, you will hear a voice prompt confirming that the call is parked.
Page 170 User Guide for the SIP-T48G IP Phone The phone will dial the configured park retrieve code and the Retrieve screen appears as below: Follow the voice prompt, do one of the following: Press on the phone where the call is parked.
Page 171 Basic Call Features It is configured for Retrieve on the dialing screen. This park retrieval number will also apply to the park retrieve park key. For more information, refer to Do Not Disturb (DND) on page 135. Click Confirm to accept the change. Note If the Park or Retrieve soft key doesn’t appear on the LCD screen, please select Disabled from the pull-down list of Custom Softkey via web user interface at path...
Page 172 You can use call pickup to answer someone else’s incoming call on your 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 target phone number. Group call pickup is used for picking up a call that is ringing at any phone number in a certain group.
Page 173: Directed Call Pickup
Basic Call Features Directed Call Pickup To enable directed call pickup and configure the directed call pickup code on a global basis via web user interface: Click on Features->Call Pickup. Select Enabled from the pull-down list of Directed Call Pickup. Enter the directed call pickup code in the Directed Call Pickup Code field.
Page 174 User Guide for the SIP-T48G IP Phone Enter the directed call pickup code in the Directed Call Pickup Code field. Click Confirm to accept the change. To pick up a call directly: Pick up the handset, tap the line key or press the Speakerphone key.
Page 175: Group Call Pickup
Basic Call Features pickup key directly. For more information, refer to Line Keys on page 95. Group Call Pickup To enable group call pickup and configure the group call pickup code on a global basis via web user interface: Click on Features->Call Pickup. Select Enabled from the pull-down list of Group Call Pickup.
Page 176 User Guide for the SIP-T48G IP Phone Enter the group call pickup code in the Group Call Pickup Code field. Click Confirm to accept the change. To pick up a call in the group: Pick up the handset, tap the line key or press Speakerphone key.
Page 177 Basic Call Features You can use anonymous call to block your identity and phone number from appearing to the called party when you call someone. For example, you want to call to consult some of the services, but don’t want to be harassed. Anonymous call is configurable on a per-line basis.
Page 178 User Guide for the SIP-T48G IP Phone 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 being displayed.
Page 179 Basic Call Features The phone will send the configured on code or off code depending on your selection when you enable or disable local anonymous rejection feature on the phone. Tap the Save soft key to accept the change or to cancel.
Page 180 User Guide for the SIP-T48G IP Phone...
Page 181 Advanced Phone Features This chapter provides operating instructions for the advanced features of the SIP-T48G IP phone. Topics include: Busy Lamp Field (BLF)  BLF List  Call Recording  Hot Desking  Intercom  Multicast Paging  Music on Hold ...
Page 182 User Guide for the SIP-T48G IP Phone (Optional.) Enter the directed call pickup code in the Extension field. Tap the Save soft key to accept the change or to cancel. BLF key is configurable via web user interface at the path DSSKey->Line key.
Page 183 Advanced Phone Features When the monitored line receives an incoming call, the following occurs on your phone: The phone plays a warning tone (if enabled).  The BLF key icon flashes red.  The caller ID appears on the touch screen (if enabled). ...
Page 184 User Guide for the SIP-T48G IP Phone on the transfer mode on DSS key, refer to Transfer on page 102. When the monitored user receives an incoming call, tap the BLF list key to pick up  the call directly. Before picking up an incoming call, ensure that the BLF List Pickup code has been configured in advance.
Page 185 Call Pickup on page 160. 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 186 User Guide for the SIP-T48G IP Phone (Optional.) Enter the string that will appear on the touch screen in the Label field. Tap the Save soft key to accept the change or to cancel. To configure a URL record key via phone user interface: Tap DSS Key.
Page 187 Advanced Phone Features During a blind or attended transfer  During a conference call  The Record and URL Record keys are not available when: There are no connected calls on your phone  You place a new call  To record a call: Tap the Record key or URL Record key during a call.
Page 188 User Guide for the SIP-T48G IP Phone You can use hot desking on the SIP-T48G IP phone to log out of existing accounts and then log into a new account. As a result, many users can share the phone resource at different times.
Page 189 Advanced Phone Features To use hot desking: Tap the Hot Desking key when the phone is idle. The touch screen prompts the following warning: Tap the OK Registration configurations of all accounts on the phone will be cleared immediately. The login wizard will be displayed as below: Enter the login information in each field.
Page 190 Intercom key is configurable via web user interface at the path DSSKey->Line Key. 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...
Page 191 Advanced Phone Features automatically answers an incoming intercom call. You can also enable the phone to automatically answer an incoming intercom call while there is already an active call on the phone. The active call is then placed on hold. Intercom features you need to know: Intercom Feature Description...
Page 192 User Guide for the SIP-T48G IP Phone Intercom Barge You can enable or disable the phone to automatically answer an incoming intercom call while there is already an active call on the phone. If Intercom Barge is enabled, the phone will automatically answer the intercom call and place the active call on hold. If Intercom Barge is disabled, the phone will handle an incoming intercom call like a waiting call.
Page 193 Advanced Phone Features You can use multicast paging to quickly and easily broadcast time sensitive announcements out to people who are listening to a specific multicast group. You can configure a multicast paging key or a paging list key on the phone, which allows you to send a Real Time Transport Protocol (RTP) stream to the pre-configured multicast address(es) without involving SIP signaling.
Page 194 User Guide for the SIP-T48G IP Phone Tap the desired line key. Tap the gray box of the Type field, and then select Key Event from the pull-down list. Tap the gray box of the Key Type field, and then select Paging List from the pull-down list.
Page 195 Advanced Phone Features Tap the Edit soft key. Enter the multicast IP address and port number (e.g., 224.5.6.20:10008) in the Address field. The valid multicast IP addresses range from 224.0.0.0 to 239.255.255.255. Enter the string that appear on the touch screen in the Label field Tap the Save soft key to accept the change.
Page 196 User Guide for the SIP-T48G IP Phone stream via web user interface. To configure a default codec for multicast paging via web user interface: Click on Features->General Information. Select the desired codec from the pull-down list of Multicast Codec. The default codec is G722.
Page 197 Advanced Phone Features the voice call in progress will take precedence over all incoming multicast paging calls. Valid values in the Paging Barge field: 1 to 10: Define the priority of the active call, 1 with the highest priority, 10 with the ...
Page 198 User Guide for the SIP-T48G IP Phone To send RTP stream via a multicast paging key when the receiver’s phone is idle: Tap the multicast paging key when the phone is idle. The phone sends RTP to a preconfigured multicast address (IP: Port).
Page 199 Advanced Phone Features Tap the desired group. Tap the Paging soft key to send RTP . Tap the Hold soft key to place the current multicast RTP session on hold. The sender’s phone places the multicast RTP session on hold and receiver’s phone releases the session.
Page 200 ACD on the SIP-T48G IP phone allows the ACD system to distribute large volumes of incoming calls to the registered ACD users. To use this feature, you should configure an ACD key in advance.
Page 201 Advanced Phone Features Tap the gray box of the Type field, and then select ACD from the pull-down list. (Optional.) Enter the string that will appear on the touch screen in the Label field. Tap the Save soft key to accept the change or to cancel.
Page 202 User Guide for the SIP-T48G IP Phone After configuring an ACD key, you can tap the ACD key to log into the . After ACD system logging in, you are ready to receive calls from the . You can tap the ACD key ACD system to show your current ACD user status.
Page 203 Advanced Phone Features You can configure a primary account on the IP phone and other alternate accounts on the other IP phones. In a SCA Hybrid Key System scenario, you can automatically assign multiple DSS keys with Line type for a registered shared line on the phone (If auto linekeys feature is enabled).
Page 204 User Guide for the SIP-T48G IP Phone Auto LineKeys is you can automatically assign multiple DSS keys with enabled, Line type for a registered shared line on the phone. Click Confirm to accept the change.
Page 205 Advanced Phone Features To configure the shared line settings and the number of line key on phone A via web user interface: Register the primary account 4603. Click on Advanced, and then select Shared Call Appearance from the pull-down list of Shared Line. Enter the desired number in the Number of line key field.
Page 206 User Guide for the SIP-T48G IP Phone The default value is 1. In this example, the value is set to 2. Click Confirm to accept the change. The phone A will automatically configure the line keys from the first unused DSS key, according to the configured number in the Number of line key field.
Page 207 Advanced Phone Features (Enter the primary account 4603 in the Register Name field.) Click on Advanced, and then select Shared Call Appearance from the pull-down list of Shared Line. Enter the desired number in the Number of line key field. This field appears only if Auto Linekeys feature is enabled.
Page 208 User Guide for the SIP-T48G IP Phone Click Confirm to accept the change. The phone B will automatically configure the line keys from the first unused DSS key, according to the configured number in the Number of line key field.
Page 209 Advanced Phone Features (Optional.) Enter the string that will appear on the touch screen in the Label field. Tap the Save soft key to accept the change or to cancel. Configuring call pull feature Call pull feature allows users to retrieve an existing call from another shared phone that is in active or public hold status.
Page 210 The phone will dial out ―*11‖ automatically when you tap the CallPull soft key. This section provides you with detailed information on using the SIP-T48G IP phone in a SCA Hybrid Key System scenario. In a SCA Hybrid Key System scenario, the status of the line key icon which associates with a shared line will change.
Page 211 Advanced Phone Features Tap the line key. The original call is placed on hold. Enter the desired number using the keypad. Press , or tap Send. Phone A will dial the entered number using the selected line key. You can have one call or multiple calls on the shared line. Incoming calls will be distributed evenly among the available line keys.
Page 212 User Guide for the SIP-T48G IP Phone To answer multiple calls on the shared line: An incoming call arrives on the shared line when there is an active call on phone A’s line key 1. The icon indicators of the line key 2 on both phone A and phone B will become and flash.
Page 213 Advanced Phone Features You can also answer the call on phone B. Do one of the following on phone B: Tap the line key 2. Phone A stops ringing. Press or tap the Answer soft key. Phone A stops ringing. The icon indicators of the line key 2 on phone A and phone B will become solid indicating that there is an active call on the line key 2.
Page 214 User Guide for the SIP-T48G IP Phone To place a call on private hold: Tap the PriHold soft key or private hold key on phone A when there is an active call on the shared line (You may need to tap the More soft key to see the PriHold soft key).
Page 215 Advanced Phone Features To retrieve the call on phone B: Do one of the following: Long tap the desired line key. The Cancel, CallPull, NewCall and Retrieve soft keys appear on the touch screen. Tap the Retrieve soft key to retrieve the call. The conversation is established between phone B and phone C, phone A disconnects the call.
Page 216 User Guide for the SIP-T48G IP Phone To interrupt the active call on the shared line: If phone A has only one active call, do the following: Long tap the desired line key on phone B. The Cancel, CallPull, NewCall and Barge In soft keys appear on the touch screen of phone B.
Page 217 Advanced Phone Features You can also tap the line key with the solid red icon indicator on phone B to set up a conference call with the other parties in the active call. If phone A has more than one call, do the following: Long tap the desired line key on phone B.
Page 218 User Guide for the SIP-T48G IP Phone key, the conference call is ended. Call pull feature allows users to retrieve an existing call from another shared phone that is in active or hold status. For example, when there is a call between phone A and phone C, you can use call pull feature on phone B to retrieve this call from phone A.
Page 219 Advanced Phone Features If there is a held call between phone A and phone C, do the following: Long tap the desired line key on phone B. The Cancel, CallPull, NewCall and Retrieve soft keys appear on the touch screen of phone B.
Page 220 User Guide for the SIP-T48G IP Phone You can share a BLA number on two or more phones. For example, phone A registers the account 14019833020 and assigns BLA number, phone B registers the account 10462190020 and assigns BLA number, phone C registers the account 14755608020.
Page 221 Advanced Phone Features Click on Advanced, and then select Draft BLA from the pull-down list of Shared Line. Enter the desired number in the BLA Number field. Click Confirm to accept the change.
Page 222 User Guide for the SIP-T48G IP Phone To register an account and configure BLA feature on phone B via web user interface: Register the account 10462190020. Click on Advanced, and then select Draft BLA from the pull-down list of Shared Line.
Page 223 Advanced Phone Features Click Confirm to accept the change. This section provides you with detailed information on using the SIP-T48G IP phone in a BLA scenario. In a BLA scenario, the status of the line key LED which associates with a bridged line will change.
Page 224 User Guide for the SIP-T48G IP Phone Press , or tap Send. Phone A will dial the entered number. When the phone C dials the BLA number ―14084588327‖, an incoming call will arrive on the bridged line. The phone A and phone B ring simultaneously. You can answer the incoming call on either phone A or phone B but not both.
Page 225 Advanced Phone Features You can send and receive text messages using the SIP-T48G IP phone. New text messages can be indicated both acoustically and visually. When receiving a new text message, the phone will play a warning tone. The power indicator LED will slow flash red, and the touch screen will prompt ―n New Text Message(s)‖...
Page 226 User Guide for the SIP-T48G IP Phone To read a text message: ->Message->Text Message->Inbox. Tap the desired text message to read. If the phone prompts receiving new text messages, you can also tap View to read the Note new messages directly.
Page 227 Advanced Phone Features Sending a text message via web user interface at the path is configurable Features->SMS. To reply a text message: ->Message->Text Message->Inbox. Select the desired message and then tap the Reply soft key. Compose the new text message. You can tap the IME soft key to change the input mode.
Page 228 You can also delete a specific message after retrieving by tapping the Delete soft key. You can leave voice mails for someone else using the SIP-T48G IP phone. You can also listen to the voice mails that are stored in a voice mailbox. When receiving a new voice mail, the phone will play a warning tone.
Page 229 Advanced Phone Features If the voice mail pop-up message box disappears, it won't pop up again unless the user receives a new voice mail or the user re-registers the account that has unread voice mail(s). Note Voice Mail is not available on all servers. You can configure the phone not to display the pop-up prompt, contact your system administrator for more information.
Page 230 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 231 Advanced Phone Features The MWI subscription parameters you need to know: Options Description Subscribe for MWI Enable or disable a subscription for MWI service. Period of MWI subscription. The IP phone sends a MWI Subscription Period refresh SUBSCRIBE request before initial subscription expires.
Page 232 User Guide for the SIP-T48G IP Phone To enable subscribe MWI to voice mail via web user interface: Click on Account->Advanced. Select the desired account from the pull-down list of Account. Select Enabled from the pull-down list of Subscribe for MWI.
Page 233 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. How can I find the basic information of the IP phone? Press the OK key when the IP phone is idle to check the basic information of the IP phone, such as IP address and firmware version.
Page 234 User Guide for the SIP-T48G IP Phone If the phone is plugged into a power strip, try to plug it directly into a wall outlet  instead. If the phone is powered from PoE, ensure that you use a PoE-compliant switch or ...
Page 235 Troubleshooting 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 236 User Guide for the SIP-T48G IP Phone and handset. Refer to Phone Installation on page 16. Why does my headset not work? Check that the headset cord is properly connected to the headset jack on the  phone. Refer to Phone Installation on page 16.
Page 237 Troubleshooting Enter the desired time in the Play Hold Tone Delay field. Click Confirm to accept the change. How to make a call using SRTP? You can enable SRTP to encrypt the audio stream(s) of phone calls. The parties participating in the call should enable SRTP on a per-line basis. To enable SRTP on a per-line basis via web user interface: Click on Account->Advanced.
Page 238 User Guide for the SIP-T48G IP Phone 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.
Page 239 Troubleshooting Click Export to open file download window, and then save the file to your local system. How to export system log? We may need you to provide a system log to help analyze your problem. To export the system log to a local PC via web user interface: Click on Settings->Configuration.
Page 240 User Guide for the SIP-T48G IP Phone Click Export to open the 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.
Page 241 Troubleshooting Click Export to open file download window, and then save diagnostic files to your local system. If the issue cannot be reproduced, just directly click Export to export all diagnostic Note files. How to reboot the phone? To reboot the phone via web user interface: Click on Settings->Upgrade.
Page 242 User Guide for the SIP-T48G IP Phone How to upgrade firmware? To upgrade firmware via web user interface: Click on Settings->Upgrade. Click Browse to locate the required firmware from your local system. Click Upgrade to upgrade the firmware. The browser pops up the dialog box ―Firmware of the SIP Phone will be updated. It will take 5 minutes to complete.
Page 243 Troubleshooting Tap the Reset key. The touch screen prompts the following warning: Tap the OK. The phone begins resetting. After reset, the touch screen prompts ―Welcome Initializing…Please wait‖.
Page 244 User Guide for the SIP-T48G IP Phone The phone will be reset to factory settings sucessfully after startup. Note Reset of your phone may take a few minutes. Do not power off until the phone has started up successfully.
Page 245 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 circumstances liable to consequences or legal issues caused by such changes.
Page 246 User Guide for the SIP-T48G IP Phone Place the device on a stable and level platform.  Please do not place heavy objects on the device in case of damageand  deformation caused by the heavy load. Keep at least 10 cm between the device and the closest object for heat ...
Page 247 Appendix A-Time Zones Time Zone Time Zone Name Samoa United States-Hawaii-Aleutian, United States-Alaska-Aleutian -9:30 French Polynesia United States-Alaska Time Canada(Vancouver,Whitehorse), Mexico(Tijuana,Mexicali), United States-Pacific Time Canada(Edmonton,Calgary), Mexico(Mazatlan,Chihuahua), United States-MST no DST, United States-Mountain Time Canada-Manitoba(Winnipeg), Chile(Easter Islands), Mexico(Mexico City,Acapulco), United States-Central Time Bahamas(Nassau), Canada(Montreal,Ottawa,Quebec), Cuba(Havana), United States-Eastern Time -4:30...
Page 248 User Guide for the SIP-T48G IP Phone Time Zone Time Zone Name +9:30 Australia(Adelaide), Australia(Darwin) Australia(Brisbane), Australia(Hobart), Australia(Sydney,Melboume,Canberra), Russia(Vladivostok) +10:30 Australia(Lord Howe Islands) New Caledonia(Noumea), Russia(Srednekolymsk Time) +11:30 Norfolk Island New Zealand(Wellington,Auckland), Russia(Kamchatka Time) +12:45 New Zealand(Chatham Islands) Tonga(Nukualofa) +13:30...
Page 249 Index Declaration of Conformity About This Guide Deleting Contacts Account Management Deleting Groups Account Registration Dial-now Adding Contacts Dial Plan Adding Groups Directory Administrator Password Display Issues Advanced Phone Features Do Not Disturb (DND) Anonymous Call Documentation Anonymous Call Rejection Dual Headset Answering Calls DSS Keys...
Page 250 User Guide for the SIP-T48G IP Phone Local Directory Log Issues Table of Contents Touch Screen Display Message Waiting Indicator (MWI) Time & Date Messages Troubleshooting Multicast Paging Multiple Line Keys per Account Music on Hold User Interfaces Using BLA Features on the IP Phone...

Yealink SIP-T48G User Manual

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