Yealink T57 User Manual

The Yealink T57 is a premium IP phone featuring a 7-inch color touchscreen, HD audio quality, Gigabit Ethernet ports, dual-band Wi-Fi, Bluetooth support, USB ports for expansion, wideband codec support, and advanced call management features. Below are key sections for safety, features, installation, setup, operation, and troubleshooting.

1. Features at a Glance 2. Installation 3. First-Time Setup 4. Specifications 5. Controls and Settings 6. Connecting Devices 7. Advanced Call Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: 7-inch capacitive touchscreen, handset with HD audio, Ethernet ports, expansion module ports, USB ports, Bluetooth/Wi-Fi antennas.

Feature	Description
Touchscreen	7-inch color capacitive touchscreen with adjustable angle
HD Audio	Wideband and ultra-wideband audio support
Network Ports	Dual Gigabit Ethernet ports (LAN/PoE)
Wireless	Dual-band Wi-Fi (802.11a/b/g/n/ac) and Bluetooth 4.2
Expansion	USB 2.0/3.0 ports for headsets and modules
Codec Support	Opus, G.722, G.729, G.711, iLBC, etc.
Conference	Built-in 3-way audio conference
Power	PoE (802.3af) or AC adapter
Headset Port	EHS (Electronic Hook Switch) support
Firmware	Upgradable via web interface or TFTP

Installation

Unpack and inspect contents. Place on stable surface.

Connect network: Use Ethernet cable to connect LAN port to switch/router (PoE supported).
Connect handset: Plug handset cable into dedicated port.
Connect power: Use PoE or connect AC adapter to power port.
Optional: Connect headset to headset port or via Bluetooth.

WARNING! Use only approved power sources. Ensure proper ventilation around device.

First-Time Setup

Power on phone; follow on-screen prompts.

Network configuration: Obtain IP via DHCP or configure manually.
Account registration: Enter SIP server, username, password provided by IT/ISP.
Language selection: Choose preferred language (default English).
Date/Time: Set time zone and synchronization method (NTP).
Test call: Make test call to verify audio quality.

CAUTION! Keep firmware updated for security and performance.

Specifications

Display: 7-inch capacitive touchscreen (800x480 pixels).
Audio: HD handset and speakerphone with acoustic echo cancellation.
Network: Dual 10/100/1000 Mbps Ethernet, Wi-Fi, Bluetooth.
Protocols: SIP, TLS, SRTP, IPv4/IPv6.
Power: PoE (802.3af Class 2) or 12V DC adapter.
Supported Codecs: Opus, G.722, G.711 (A/μ-law), G.729, iLBC, etc.
Operating Temp: 0°C to 40°C (32°F to 104°F).
Humidity: 10% to 90% non-condensing.

Controls and Settings

Access settings via touchscreen menu or web interface (enter IP in browser).

Physical Buttons: Mute, Volume up/down, Headset, Speakerphone, Navigation keys.

Touchscreen: Home screen with favorites, call history, contacts, settings.

Basic Settings: Language, time zone, screen brightness, ringtone selection. Network: Wi-Fi setup, Ethernet configuration, VLAN. Account: SIP registration, call forwarding, voicemail. Audio: Handset volume, speaker volume, microphone gain, codec priority.

Connecting Devices

Network: Ethernet cable to LAN port. Peripherals: USB headset, Bluetooth devices, expansion modules.

Turn off phone before connecting wired peripherals.
Pair Bluetooth: Enable Bluetooth in settings, search for devices.
Connect expansion module: Plug into USB port, phone auto-detects.

Tip: Use shielded cables for better performance and interference reduction.

Advanced Call Features

Supports call hold, transfer, conference, forward, park, and more.

Make call: Dial number or select contact, press call button.
Hold: Press hold button during active call.
Transfer: Press transfer, dial target number, complete transfer.
Conference: During call, press conference, add second party.
Forward: Set up call forward rules in account settings.
Voicemail: Access via voicemail button or dial voicemail number.
Call recording: Press record during call (if enabled by provider).
Speed dial: Assign numbers to programmable keys.

WARNING! Emergency calls may require specific configuration; verify with provider.

Accessibility Features

High-contrast display mode, adjustable font sizes, tactile buttons, hearing aid compatible (HAC) handset, visual alerts for incoming calls.

Care & Cleaning

Unplug before cleaning. Use slightly damp lint-free cloth; avoid liquids and abrasive cleaners.

CAUTION! Do not use alcohol, ammonia, or harsh chemicals on screen or casing.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. CE, RCM, UKCA marked. Hearing Aid Compatible (HAC). For support, visit www.yealink.com or contact authorized distributor.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power source/cable	Check PoE switch or AC adapter; ensure cable securely connected.
No network	Cable/DHCP	Verify Ethernet cable; check DHCP server; restart phone.
No audio	Volume/codec	Adjust volume; check audio codec compatibility with provider.
Registration failed	Credentials/network	Verify SIP username/password; check firewall settings.
Touchscreen unresponsive	Calibration/software	Restart phone; recalibrate touchscreen in settings.

Reset: Press and hold OK key during boot for factory reset.

Service: Contact Yealink support or authorized service center.