Yealink Phone T21P E2 Manual

The Yealink T21P E2 is a feature-rich business IP phone designed for small to medium-sized enterprises. It supports 2 SIP lines, HD voice quality, PoE (Power over Ethernet), dual 10/100Mbps network ports, a 132x64 pixel graphical LCD with backlight, built-in speakerphone, headset support, and extensive call features including call hold, transfer, forward, conference, and redial. 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: Handset, Base Unit, Graphical LCD, Keypad, Function Keys, Ethernet Ports, Power Adapter Port.

Feature	Description
LCD Display	132x64 pixel graphical LCD with backlight for call information and menus
HD Voice	Wideband audio support for superior call clarity
Dual Ethernet Ports	10/100Mbps LAN and PC ports with PoE support (IEEE 802.3af)
Speakerphone	Full-duplex hands-free speaker
Headset Port	RJ9 port for wired headset connectivity
Function Keys	Programmable keys for line, speed dial, BLF, and call features
Volume Controls	Separate controls for handset, speaker, and ringer
MUTE	Mutes the microphone during a call
HOLD	Places an active call on hold
CONF	Initiates a conference call between multiple parties

Installation

Unpack and inspect contents. Place on stable surface.

Connect to Network: Use an Ethernet cable to connect the LAN port to your router/switch. Use the PC port to connect a computer if needed.
Power the Phone: Connect the included power adapter to the DC 5V port, or use PoE from a compatible switch.
Connect Handset: Plug the handset cord into the dedicated RJ9 port on the base.
Connect Headset (Optional): Plug a wired headset into the RJ9 headset port.

WARNING! Use only the provided power adapter. Ensure network cables are securely connected.

First-Time Setup

Power on the phone; it will attempt to auto-provision from the network or prompt for manual configuration.

Network Configuration: If using DHCP (default), the phone will obtain an IP address automatically. Check the IP via Menu > Status > Network.
SIP Account Registration: Access Menu > Settings > Account. Enter SIP server, username, password, and display name provided by your service provider.
Date & Time: Set time zone and NTP server in Menu > Settings > Time & Date.
Audio Settings: Adjust handset, speaker, and ringer volume using the side volume keys or menu settings.

CAUTION! Handle the handset cord with care to avoid damage to the connectors.

Specifications

Display: 132x64 pixel graphical LCD with backlight.
Network: Dual 10/100Mbps Ethernet ports, PoE (IEEE 802.3af).
Protocols: SIP RFC3261, TCP/IP, UDP, RTP, RTCP, DHCP, DNS, NTP.
Audio Codecs: G.711a/u, G.722 (HD), G.726, G.729AB.
Call Features: Hold, Transfer, Forward, 3-way Conference, Call Waiting, DND.
Power Supply: External 5V DC adapter or PoE.
Operating Environment: 0°C to 40°C, 10% to 90% humidity.
Supported Languages: English, French, Spanish, German, and more.

Controls and Settings

Access menus via the NAVIGATION keys and OK button. Front Panel: LCD, Soft Keys, NAVIGATION keys, MUTE, HEADSET, SPEAKERPHONE, HOLD, Volume Controls.

Keypad: Standard 0-9, *, #, MENU, NAVIGATION, OK, CANCEL, MUTE, HEADSET, SPEAKER, HOLD, TRANSFER, CONFERENCE.

Settings Menu: Account configuration, Network settings, Audio settings (handset, speaker, ringer), Time & Date, Call Features (Call Forward, DND, Call Waiting), Phone Status (Network info, Firmware version).

Connecting Devices

Network: LAN port to router/switch. PC: PC port to computer. Handset/Headset: RJ9 ports.

Ensure phone is powered off before connecting cables.
Use standard Ethernet cables for network connections.
For PoE, ensure your network switch provides IEEE 802.3af power.
Select audio source during a call using HEADSET or SPEAKERPHONE keys.

Tip: Use the PC port to connect a computer, saving a switch port and cable.

Advanced Call Features

Supports standard and advanced VoIP calling features.

Make a Call: Lift handset or press SPEAKERPHONE/HEADSET, dial number, press DIAL soft key or wait.
Answer a Call: Lift handset, press SPEAKERPHONE, HEADSET, or ANSWER soft key.
Call Hold: Press HOLD key during a call. Resume by pressing RESUME soft key.
Call Transfer (Blind): Press TRANSFER, dial target number, press TRANSFER again.
Call Transfer (Attended): Press TRANSFER, dial target, consult, then press TRANSFER to complete.
3-Way Conference: During a call, press CONF, dial second party, press CONF again to merge.
Call Forward: Configure via Menu > Settings > Call Features > Call Forward (Always, Busy, No Answer).
Redial: Press the REDIAL soft key or dial ** to call the last dialed number.

WARNING! Do not use the phone in wet or humid conditions to prevent electrical shock.

Accessibility Features

Ringer Volume: Adjustable in 5 levels via volume keys or menu. LCD Contrast: Adjustable in Menu > Settings > Display. Headset Mode: Toggle between handset and headset audio.

Care & Cleaning

Unplug power before cleaning. Use a soft, dry cloth to wipe the exterior. Do not use liquid or aerosol cleaners.

CAUTION! Do not disassemble the phone. Avoid exposure to extreme temperatures and direct sunlight.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. CE, RCM, UKCA marked. This product contains lithium battery for memory backup; dispose of according to local regulations. For support, visit www.yealink.com or contact your service provider.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No dial tone	Network/Power	Check Ethernet and power connections; verify SIP account is registered.
One-way or no audio	Network/Firewall	Check router/firewall settings for SIP ALG and RTP ports; verify audio codec settings.
Phone not powering on	Power Source	Ensure power adapter is connected properly; try a different outlet; check PoE switch power.
LCD display is blank	Backlight/Power	Adjust LCD contrast in settings; ensure phone is powered on.
Cannot register to SIP server	Account Settings	Verify SIP server address, username, and password; check network connectivity to the server.

Reset: Press and hold the OK key for 10 seconds while powering on to factory reset (will erase all settings).

Service: www.yealink.com; contact your service provider for configuration support.