Yealink T21P E2 User Manual

The Yealink T21P E2 is a feature-rich SIP desk phone designed for business environments. It offers high-definition voice quality, a clear graphical LCD display, support for multiple lines, PoE (Power over Ethernet), headset compatibility, and extensive programmability. Below are key sections covering safety, features, installation, configuration, 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 Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Graphical LCD display, Handset, Keypad, Function keys (Hold, Mute, Headset, Speakerphone), Ethernet ports (LAN and PC), Power adapter port.

Feature	Description
Graphical LCD	2-line display with backlight for call information and menus
HD Voice	Wideband audio support for superior call clarity
Dual Ethernet Ports	LAN and PC ports for pass-through connectivity
Power over Ethernet (PoE)	IEEE 802.3af compliant; can be powered via Ethernet cable
Headset Port	3.5mm jack for hands-free operation
Programmable Keys	Up to 2 line keys with LED indicators; configurable for speed dial, BLF, etc.
Speakerphone	Full-duplex hands-free speaker
Volume Controls	Dedicated buttons for handset, speaker, and ringer volume
HOLD	Places an active call on hold
MUTE	Mutes the microphone during a call

Installation

Unpack and inspect contents. Place on a stable, flat surface.

Connect to Network: Plug an Ethernet cable from your router/switch into the phone's LAN port.
Optional PC Connection: Plug another Ethernet cable from the phone's PC port to your computer.
Power the Phone: Connect the power adapter to the DC 5V port and an electrical outlet, OR use PoE via the LAN cable.
Connect Handset: Plug the handset cord into the dedicated jack.
Optional Headset: Plug a 3.5mm headset into the headset jack.

WARNING! Use only the provided or Yealink-approved power adapter. Ensure cables are not pinched or damaged.

First-Time Setup

Power on the phone; it will attempt to auto-provision from your SIP server.

Check Network: Ensure the phone obtains an IP address (check via Menu > Status > Network).
Configure Account: If not auto-provisioned, manually enter SIP server, username, and password via Menu > Account.
Set Language: In Menu > Basic Settings > Preferences, set the language (default is ENGLISH).
Set Time & Date: Configure time zone and NTP server for accurate time display.
Test Call: Make a test call to verify audio and registration.

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

Specifications

Display: 2-line graphical LCD with white backlight.
Network Protocols: SIP (RFC3261), TCP/IP, UDP, RTP, RTCP, DHCP, NTP, TFTP.
Audio Codecs: G.711 (a/μ-law), G.722 (HD), G.726, G.729AB.
Ports: 2 x 10/100Mbps Ethernet (RJ45), Handset (RJ9), Headset (3.5mm), DC 5V power.
Power: External 5V DC adapter or IEEE 802.3af PoE.
Programmable Keys: 2 physical line keys with multi-color LEDs.
Ringer: Multiple melodies, adjustable volume.
Operating Environment: 0°C to 40°C, 10% to 90% humidity (non-condensing).

Controls and Settings

Access the menu system via the dedicated MENU button or the navigation keys.

Front Panel: LCD, Navigation keys (Up/Down/Left/Right/OK), MENU, HOLD, MUTE, HEADSET, SPEAKER, Volume keys, numeric keypad.

Menu Structure: Status (Network, Account, System), Account (SIP settings), Call Features (Call Forward, DND), Basic Settings (Time, Language, Ringtone), Advanced Settings (Network, Security).

Key Functions: HOLD toggles call hold. MUTE toggles microphone. HEADSET toggles headset mode. SPEAKER toggles speakerphone.

Connecting Devices

Network: LAN port to switch/router. PC: PC port to computer for shared internet. Headset: 3.5mm plug.

Ensure the phone is powered off or disconnected before making connections.
Use standard CAT5e or higher Ethernet cables.
For PoE, ensure your network switch provides 802.3af power.
Select audio path during a call using HEADSET or SPEAKER buttons.

Tip: Use the PC port to connect a computer, saving an extra port on your network switch.

Advanced Features

Supports call hold, transfer, forward, three-way conference, and Do Not Disturb (DND).

Make a Call: Lift handset or press SPEAKER/HEADSET, dial number.
Answer a Call: Lift handset, press SPEAKER, or press the flashing line key.
Call Hold: Press HOLD during a call. Press the held line key to resume.
Call Transfer (Blind): Press TRANSFER (or MENU option), dial target number, press TRANSFER again.
Call Forward: Enable via Menu > Call Features > Call Forward. Set conditions (Always/Busy/No Answer).
Three-Way Conference: During a call, press CONFERENCE (or MENU option), dial third party, press CONFERENCE again to merge.
DND: Press and hold the MUTE key for 2 seconds, or enable via menu. LED indicator lights red.
Speed Dial: Assign numbers to programmable keys via web interface or phone menu.

WARNING! Do not use liquid or aerosol cleaners on the keypad or display.

Accessibility Features

Adjustable Ringer Volume: Use volume keys when phone is idle. High-Contrast Display: Adjustable backlight timeout and brightness in Menu > Basic Settings > Preferences. Hearing Aid Compatible (HAC) Handset: Available on compliant models.

Care & Cleaning

Disconnect power before cleaning. Use a soft, dry, lint-free cloth. For stubborn marks, slightly dampen the cloth with water. Do not use solvents or abrasive cleaners.

CAUTION! Never spray liquids directly onto the phone. Avoid extreme temperatures and direct sunlight.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential installations. CE Mark: Conforms to European safety and EMC directives. RCM: Complies with Australian communications standards. Copyright © Yealink Inc. For support, visit www.yealink.com or contact your authorized reseller.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power / No display	Power adapter/PoE	Check power adapter connection; try a different outlet; verify PoE switch is enabled.
No network connection	Cable/DHCP	Check Ethernet cable at both ends; restart phone and router; verify DHCP is on.
Cannot register to server	Account settings	Verify SIP server address, username, and password. Check network firewall.
No dial tone	Line configuration	Ensure account is registered. Check with your service provider.
One-way or poor audio	Network/Codec	Check network latency/jitter. Try changing the preferred audio codec (e.g., to G.711).
Remote not working (if applicable)	Batteries/Range	Replace batteries; ensure you are within range and pointing at the IR sensor.

Factory Reset: Press and hold the OK key while powering on the phone, or use Menu > Advanced Settings > Maintenance > Factory Reset.

Service: Contact your system administrator or visit www.yealink.com for firmware and documentation.