Installation Guide
Tools Needed:
- Ethernet cable (Cat5e or higher)
- Power adapter (included)
- Handset and cord
- Network switch/router
- SIP account credentials
Step-by-Step Installation
- Unpack and Inspect: Remove all components from packaging and verify contents: phone base, handset, handset cord, Ethernet cable, power adapter, and stand.
- Connect to Network: Connect one end of Ethernet cable to LAN port on phone, other end to network switch/router. For PoE, ensure switch supports 802.3af.
- Power Connection: Connect power adapter to phone's DC port and wall outlet. Skip if using Power over Ethernet (PoE).
- Handset Connection: Connect handset cord to handset and HS port on phone base.
- Optional Accessories: Connect headset to headset port, and expansion module to EXP40 port if required.
- Power On: Press power button or connect power. Wait for boot sequence to complete (approximately 60 seconds).
- Configuration: Access web interface via IP address shown on screen or use auto-provisioning with SIP server details.
- Test Call: Make test call to verify audio quality and functionality.
Specifications
| Model Series | T54S |
| Type | Business IP Phone |
| Color | Black / White |
| Display | 4.3-inch 480x272 color LCD |
| Network Ports | Dual Gigabit Ethernet (10/100/1000 Mbps) |
| Protocol Support | SIP, TLS, SRTP, IPv4/IPv6 |
| Audio Codecs | G.711, G.722, G.729, Opus, iLBC |
| Power Options | PoE (802.3af), 12V DC adapter |
| Dimensions (HxWxD) | 220 x 235 x 170 mm |
| Weight | 1.2 kg |
| Operating Temperature | 0°C to 40°C |
| Humidity | 10% to 90% non-condensing |
Warranty Information
- Standard Warranty: 2 years parts and labor
- Extended Support: Optional 5-year support available
- Firmware Updates: Lifetime security updates
For warranty service, contact Yealink Support at 1-866-880-1505 or visit Yealink.com/support
Key Features
HD Voice Quality
Wideband audio with Opus and G.722 codecs delivers crystal-clear voice quality with reduced background noise and enhanced speech intelligibility.
Dual Gigabit Ports
Integrated network switch with two Gigabit Ethernet ports allows daisy-chaining to PC without additional network drop, saving infrastructure costs.
PoE Support
Power over Ethernet (802.3af) support eliminates need for power adapter, simplifying installation and reducing cable clutter.
Advanced Security
Enterprise-grade security with TLS 1.2, SRTP, 802.1X authentication, and secure boot protects against eavesdropping and unauthorized access.
Bluetooth Connectivity
Built-in Bluetooth 5.0 enables wireless headset pairing and mobile phone integration for seamless call handling.
Expansion Module Support
Supports up to 4 EXP40 expansion modules for additional line keys, speed dials, and BLF indicators for busy lamp field monitoring.
Call Management Features
Call Forwarding
Flexible call forwarding options: always, busy, no answer, and unconditional to any destination number.
Conference Calling
3-way conference calling with merge and split functions, supporting up to 5 concurrent conference sessions.
Call Recording
One-touch call recording with automatic upload to FTP/TFTP server or local storage via USB.
Busy Lamp Field
Visual status monitoring of colleagues' availability with color-coded indicators for idle, busy, ringing, and away states.
Call Park/Retrieve
Park calls to shared extensions and retrieve from any phone in the system for efficient call handling.
Auto Attendant
Built-in auto attendant with customizable IVR menus for professional call routing without PBX.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No dial tone | Network issue, SIP registration failed, incorrect configuration | Check network connection, verify SIP credentials, reboot phone |
| One-way audio | Firewall blocking RTP, NAT traversal issue, codec mismatch | Configure firewall rules, enable STUN, verify codec settings |
| Phone won't boot | Power issue, corrupted firmware, hardware failure | Check power source, try factory reset, contact support |
| Poor audio quality | Network congestion, QoS not configured, faulty handset | Enable QoS on network, check cable quality, test with different handset |
| Display issues | Loose connection, firmware bug, hardware defect | Check display cable, update firmware, contact support |
| Cannot access web interface | IP address changed, HTTP disabled, network restrictions | Check IP via phone menu, enable HTTP access, verify subnet |
Common Error Messages
- No Service: SIP registration failed - Check credentials and server address
- Network Down: Ethernet connection issue - Check cable and switch port
- Invalid Password: Authentication failure - Verify SIP password
- Provisioning Failed: Configuration download issue - Check provisioning server URL
- Memory Full: Call logs or recordings full - Clear old data
- Codec Unsupported: Audio codec mismatch - Configure common codec with server
Manual Downloads
Current T5 Series Models
T54S
16-line IP Phone with Bluetooth
T53
12-line IP Phone
T57W
Touch Screen IP Phone
T58A
Advanced Executive Phone
Popular Previous Models
T46S
12-line SIP Phone
T42S
8-line Entry Phone
T29G
6-line Gigabit Phone
T21P E2
4-line Basic IP Phone
Accessory Manuals
EXP40
40-key Expansion Module
WH62
Wireless DECT Headset
CP900
Conference Phone
VP59
Video Phone