Name: Yealink SIP-T4U Series
Brand: Yealink
Rating: 4 (1 reviews)

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Security Features

122

Supported

Devices

T57W, T54W, T53W, T53, T48U, T48S, T46U, T46S, T43U, T42U, CP920

[1]

If you change this parameter, the phone will reboot to make the change take effect.

Before You Begin2
- Related Documentations2
- Recommended References2
- Summary of Changes2
  - Changes for Release V85, Guide Version V85.13
Table of Contents4
Getting Started23
- Requirements23
- Yealink IP Phones in a Network23
- Initialization Process Overview24
- Verifying Startup25
Network Configurations26
- Ipv4 and Ipv6 Wired Network Settings26
- DHCP Option for Ipv434
- DHCP Option for Ipv637
  - Supported DHCP Option for Ipv637
  - DHCP Option 59 and Custom Option37
- Vlan38
- Wi-Fi43
- Real-Time Transport Protocol (RTP) Ports55
  - RTP Ports Configuration56
- Network Address Translation (NAT)56
- Internet Port and PC Port61
  - Supported Transmission Methods61
  - Internet Port and PC Port Configuration61
- Vpn63
- Quality of Service (Qos)66
  - Voice and SIP Qos Configuration66
- 802.1X Authentication67
  - 802.1X Authentication Configuration67
- TR-069 Device Management70
  - Supported RPC Methods70
  - TR-069 Configuration70
Phone Provisioning73
- Boot Files, Configuration Files, and Resource Files73
- Provisioning Methods80
- Setting up a Provisioning Server94
- Keeping User's Personalized Settings after Auto Provisioning99
- Example: Deploying Phones from the Provisioning Server102
Security Features105
- User and Administrator Identification105
  - User and Administrator Identification Configuration105
  - User Access Level Configuration106
- Auto Logout Time107
  - Auto Logout Time Configuration107
- Phone Lock107
  - Operation Behaviors on Lock Phone108
  - Phone Lock Configuration108
- Transport Layer Security (TLS)110
- Secure Real-Time Transport Protocol (SRTP)116
  - SRTP Configuration117
- Encrypting and Decrypting Files119
- Incoming Network Signaling Validation123
  - Incoming Network Signaling Validation Configuration123
- USB Port Lock124
  - USB Port Lock Configuration124
Firmware Upgrade126
- Firmware for each Phone Model Firmware Upgrade Configuration126
Using Handsets with T57W/T54W/T53W/T53 Phones128
- Handset Backlight128
  - Handset Backlight Configuration128
- Handset Keypad Light129
  - Handset Keypad Light Configuration129
- Handset Wallpaper130
  - Handset Wallpaper Configuration130
- Handset Screen Saver130
  - Handset Screen Saver Configuration130
- Handset Name131
  - Handset Name Configuration131
- Number Assignment131
  - Number Assignment Configuration132
- End Call on Hook133
  - End Call on Hook Configuration133
- Advisory Tones133
  - Advisory Tones Configuration134
- Base PIN135
  - Base PIN Configuration135
- DECT Intercom136
  - DECT Intercom Configuration136
- Shared Directory137
  - Shared Directory Configuration137
  - Shared Contact File Customization137
    - Customizing Shared Contact File138
    - Shared Contact File Elements and Attributes138
- Satellite Mode138
  - Satellite Mode Configuration139
  - Example: Configuring the Satellite Mode Feature140
- Repeater Settings Parameters141
- Handset Settings Parameters142
  - Custom Handset Related Configurations146
- Handset Firmware Upgrade Configuration147
Audio Features149
- Alert Tone149
  - Alert Tone Configuration149
- Touch Tone151
  - Touch Tone Configuration151
- Ring Tones151
  - Custom Ringtone Limit151
  - Ringtone Configuration152
- Distinctive Ring Tones154
  - Supported Alert-Info Headers Format154
  - Distinctive Ring Tones Configuration157
- Ringer Device158
  - Ringer Device Configuration159
- Audio Volume159
  - Ringer Volume Configuration159
  - Sending Volume Configuration160
- Tones162
  - Supported Tones162
  - Tones Configuration163
- Audio Codecs168
  - Supported Audio Codecs168
  - Audio Codecs Configuration170
- Packetization Time (Ptime)173
  - Supported Ptime of Audio Codec173
  - Ptime Configuration174
- Early Media174
  - Early Media Configuration174
- Headset Prior175
  - Headset Prior Configuration175
- Dual Headset176
  - Dual Headset Configuration176
- Acoustic Clarity Technology176
- Smart Noise Filtering182
  - Smart Noise Filtering Configuration182
- Dtmf182
- Voice Quality Monitoring (VQM)186
  - Rtcp-Xr186
    - RTCP-XR Configuration187
  - Vq-Rtcpxr187
Phone Customization194
- Language194
  - Supported Languages194
  - Language Display Configuration195
  - Language for Phone Display Customization196
  - Language for Web Display Customization198
- Contrast200
  - Contrast Configuration200
- Wallpaper201
  - Wallpaper Configuration201
  - Wallpaper Customization202
  - Adding a Wallpaper from a USB Flash Drive203
  - Example: Setting a Custom Picture as Wallpaper204
- Transparency204
  - Transparency Configuration204
- Screen Saver205
  - Screensaver Display Customization205
    - Customizing the Screen Saver File206
    - Screensaver File Elements and Attributes206
  - Custom Screensaver Picture Limit207
  - Screensaver Configuration207
  - Adding a Screensaver Picture from a USB Flash Drive210
  - Deleting a Screensaver Picture210
- Backlight210
  - Supported Backlight Options211
  - Backlight and Time Configuration211
- Label Length for Line Key Display212
  - Label Length Display Configuration213
- Label Alignment for Line/Ext Key Display214
  - Label Alignment Display Configuration214
- Page Switch Key215
  - Page Switch Key Configuration215
- Page Tips215
  - Phone Page Tips215
    - Phone Page Tips Indicator215
    - Phone Page Tips Configuration216
  - Expansion Module Page Tips216
    - Expansion Module Page Tips Configuration217
    - Expansion Module Page Tips Indicator217
- Time and Date217
  - Time Zone218
  - NTP Settings221
    - NTP Configuration221
  - DST Settings223
  - Time and Date Manually Configuration226
  - Time and Date Format Configuration227
  - Date Customization Rule228
- Idle Clock Display229
  - Idle Clock Display Configuration229
- Logo Customization229
  - Custom Logo Picture Limit230
  - Customizing a Logo Picture230
  - Custom Logo Configuration231
  - Example: Setting a Custom Logo Display232
- Call Display232
  - Call Display Configuration233
- Display Method on Dialing235
  - Display Method on Dialing Configuration236
- Key as Send236
  - Key as Send Configuration236
- Softkey Layout237
  - Softkey Layout File Customization237
    - Customizing Softkey Layout File238
    - Softkey Layout File Elements and Attributes238
  - Softkey Layout Configuration239
  - Example: Setting the Soft Keys Layout in Talking State241
- Input Method241
  - Keypad Input Method File Customization241
    - Customizing the Keypad Input Method File242
  - Onscreen Keyboard Input Method File Customization242
  - Input Method Configuration246
  - Example: Configuring the French Onscreen Keyboard Input Method248
- Notification Popups249
  - Notification Popups Configuration249
- Power LED Indicator250
  - Power LED Indicator Configuration250
- Bluetooth253
  - Bluetooth Configuration253
- Handset/Headset/Speakerphone Mode255
  - Handset/Headset/Speakerphone Mode Configuration255
- DSS Keys256
  - Supported DSS Keys257
  - Supported Dsskey Types257
  - Line Keys258
  - Programmable Keys265
    - Supported Programmable Keys265
    - Programmable Keys Configuration266
  - Ext Keys269
    - Ext Keys Configuration269
  - Dsskey Lock Configuration272
  - Dsskey Page Reset Configuration273
- Enhanced DSS Keys273
  - Guidelines for Configuring Enhanced DSS Keys274
  - Macro Action Strings274
  - EDK Configuration278
  - EDK List Configuration278
  - EDK User Input Prompt Configuration279
  - EDK Soft Keys Configuration281
  - Example: Configuring EDK List for a Line Key284
  - Example: Using EDK Macro Strings as the Contact Number285
- Power Saving285
  - Power Saving Configuration286
- Search Source List in Dialing288
  - Search Source File Customization288
    - Search Source File Attributes289
    - Customizing Search Source File290
  - Search Source List Configuration290
- Recent Call Display in Dialing292
  - Recent Call in Dialing Configuration292
- Icon Customization292
  - Custom Icons Configuration292
- Warnings Display293
  - Warnings Display Configuration293
- Out of Service293
  - Out of Service Configuration293
Account Settings295
- Account Registration295
- Outbound Proxy in Dialog302
  - Outbound Proxy in Dialog Configuration302
- Server Redundancy303
- SIP Server Name Resolution309
  - SIP Server Name Resolution Configuration309
- Static DNS Cache310
  - Behave with a Configured DNS Server310
  - Static DNS Cache Configuration311
- Logon Wizard314
  - Logon Wizard Configuration314
- Multiple Line Keys Per Account316
Directory320
- Local Directory320
- Local Contacts Backup327
- Favorite Contacts328
  - Favorites Configuration328
- Google Contacts329
  - Google Contacts Configuration329
  - Signing in to the Google Contact Server330
- Lightweight Directory Access Protocol (LDAP)330
- Remote Phone Book338
- Directory List for Directory/Dir Soft Key341
- Directory Search Settings345
  - Directory Search Settings Configuration345
- Number Matching Settings346
  - Number Matching Settings Configuration346
  - Example: Matching Contacts with the Caller's Phone Number Using the Regular Expression347
Call Log348
- Call Log Display Call Log Configuration Call Logs Backup348
Call Features353
- Dial Plan Defined by Four Patterns (Old Dial Plan Mechanism)353
  - Basic Regular Expression Syntax for Four Patterns354
  - Replace Rule File Customization354
    - Replace Rule File Attributes354
    - Customizing the Replace Rule File355
  - Dial Now File Customization355
    - Dial Now File Attributes355
    - Customizing the Dial Now File356
  - Replace Rule Configuration356
  - Dial Now Configuration357
  - Area Code Configuration358
  - Block out Configuration359
  - Example: Adding Replace Rules Using a Replace Rule File360
- Dial Plan Defined by Digit Map (New Dial Plan Mechanism)361
  - Basic Regular Expression Syntax for Digit Map361
  - Digit Map for All Lines Configuration362
  - Digit Map for a Specific Line Configuration365
- Emergency Dialplan and Enhanced 911368
  - Emergency Dialplan and Enhanced 911 Configuration369
  - Hotline Configuration373
- Off Hook Hot Line Dialing374
  - Off Hook Hot Line Dialing Configuration374
- Live Dialpad375
  - Live Dialpad Configuration375
- Auto Redial375
  - Auto Redial Configuration375
- Recall Configuration377
- Speed Dial377
  - Speed Dial Key Configuration377
- Password Dial378
  - Password Dial Configuration378
- Call Timeout378
  - Call Timeout Configuration379
- Anonymous Call379
  - Anonymous Call Configuration379
- Call Number Filter380
  - Call Number Filter Configuration380
- IP Address Call381
  - IP Address Call Configuration381
- Ignoring Incoming Calls381
  - Ignoring Incoming Calls Configuration382
- Off Hook Answering382
  - Off Hook Answering Configuration382
- Auto Answer383
  - Auto Answer Configuration383
- Anonymous Call Rejection386
  - Anonymous Call Rejection Configuration386
- Call Waiting387
  - Call Waiting Configuration387
- Do Not Disturb (DND)388
  - DND Settings Configuration389
  - DND Feature Configuration391
    - DND in Phone Mode Configuration391
    - DND in Custom Mode Configuration392
  - DND Synchronization for Server-Side Configuration393
- Multiple Call Appearances394
  - Multiple Call Appearances Configuration394
- Call Hold395
  - Call Hold Configuration396
  - Music on Hold (Moh) Configuration398
- Call Mute398
  - Microphone Mute Configuration398
  - Keep Mute399
    - Keep Mute Configuration399
  - Mute Alert Tone399
    - Mute Alert Tone Configuration399
- Call Forward400
  - Call Forward Settings Configuration400
  - Call Forward Feature Configuration402
    - Call Forward in Phone Mode Configuration402
    - Call Forward in Custom Mode Configuration406
  - Call Forward Synchronization for Server-Side Configuration410
- Call Transfer412
  - Call Transfer Configuration412
  - Transfer Mode for Dsskey Configuration413
- Conference414
  - Conference Type Configuration414
  - Local Conference Configuration414
  - Network Conference Configuration415
- USB Recording416
  - USB Recording Configuration416
- Multicast Paging417
  - Multicast Paging Group Configuration418
  - Multicast Listening Group Configuration419
  - Multicast Paging Settings419
    - Multicast Paging Settings Configuration420
Advanced Features423
- Call Pickup423
  - Directed Call Pickup423
    - Directed Call Pickup Configuration423
  - Group Call Pickup425
    - Group Call Pickup Configuration425
- Dialog Info Call Pickup426
  - Dialog Info Call Pickup Configuration427
- Call Completion427
  - Call Completion Configuration430
  - Example: Using Call Completion430
- Call Park and Retrieve430
- Automatic Call Distribution (ACD)433
- Busy Lamp Field435
- Shared Line456
- Intercom460
- CSTA Control464
  - CSTA Control Configuration465
- Action URL465
- Action URI479
- Voice Mail486
  - MWI for Voice Mail Configuration486
- Short Message Service (SMS)488
  - SMS Configuration488
- XML Browser488
  - XML Browser Configuration488
- Hot Desking490
  - Hot Desking Key Configuration491
  - Hot Desking Configuration491
General Features493
- Line Identification Presentation493
  - CLIP and COLP Configuration493
- Return Code for Refused Call495
  - Return Code for Refused Call Configuration495
- Return Code for Unanswered Call495
  - Return Code for Unanswered Call Configuration495
- Hide Feature Access Codes496
  - Hide Feature Access Codes Configuration496
- Accept SIP Trust Server Only497
  - Accept SIP Trust Server Only Configuration497
- 100 Reliable Retransmission497
  - 100 Reliable Retransmission Configuration498
- SIP Session Timer498
  - SIP Session Timer Configuration498
- Session Timer499
  - Session Timer Configuration500
- Reboot in Talking500
  - Reboot in Talking Configuration501
- Reserve # in User Name501
  - Reserve # in User Name Configuration501
- Busy Tone Delay502
  - Busy Tone Delay Configuration502
- CFG File Version Information502
  - CFG File Version Information Configuration502
- Media Loopback503
  - Media Loopback Configuration503
- Cloud504
  - Cloud Configuration505
Configuration Parameters506
- Broadsoft Parameters506
- Start2Start ACD Parameters527
- Alcatel-Lucent Barge in Parameters529
- Ethernet Interface MTU Parameters530
- SIP Settings Parameters530
- Call Settings Parameters534
- Unify Parameters536
Troubleshooting Methods537
- Exporting All the Diagnostic Files537
- Log Files537
  - Local Logging537
  - Syslog Logging542
    - Syslog Logging Configuration542
    - Viewing the Syslog Messages on Your Syslog Server545
- Resetting Phone and Configuration545
- Packets Capture547
  - Capturing the Packets Via Web User Interface548
    - Capturing the Packets in Enhanced Way548
    - Capturing the Packets in Normal Way548
  - Ethernet Software Capturing Configuration549
    - Span to PC Port Configuration549
- Watch Dog549
  - Watch Dog Configuration550
- Network Diagnostics550
  - Ping and Traceroute Diagnostics550
  - Network Reachability Detection Configuration551
- Analyzing Configuration Files552
- Device Status554
  - Viewing Device Status554
- Phone Reboot554
Troubleshooting Solutions556
- IP Address Issues556
- Time and Date Issues557
  - Display Time and Date Incorrectly557
- Display Issues557
  - The Phone Screen Is Blank557
    - The Phone Displays "No Service557
- Phone Book Issues557
  - Difference between a Remote Phone Book and a Local Phone Book557
- Audio Issues557
- Wi-Fi and Bluetooth Issues558
- Firmware and Upgrading Issues558
- System Log Issues560
  - Fail to Export the System Log to a Provisioning Server (FTP/TFTP Server)560
  - Fail to Export the System Log to a Syslog Server560
- Protocols and Ports Issues560
  - What Communication Protocols and Ports Do Yealink IP Phones Support560
- Password Issues561
  - Restore the Administrator Password561
  - The Web Screen Displays "Default Password Is in Use. Please Change561
- Logo Issues562
  - Why Does the IP Phone Use DOB Format Logo File Instead of Popular BMP, JPG and so on562
- Power and Startup Issues562
- Other Issues562
Appendix564
- RFC and Internet Draft Support564
- Reading Icons566

Yealink SIP-T4U Series User Manual

Table of Contents

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Yealink SIP-T4U Series Specifications

Related product manuals

Brand	Yealink
Model	SIP-T4U Series
Category	IP Phone
Language	English