Yealink T21P E2 Manual

The Yealink T21P E2 is a feature-rich VoIP desk phone designed for business environments. It supports HD voice, dual Gigabit Ethernet ports with integrated PoE, a high-resolution graphical LCD, and extensive call management features. Below are key sections covering 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. Call Management 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Graphical LCD display, Handset, Keypad, Ethernet ports, Headset jack, Power adapter port.

Feature	Description
HD Voice	Wideband audio for superior call clarity
Dual Gigabit Ethernet	Integrated PoE (802.3af) and LAN pass-through
Graphical LCD	High-resolution 132x64 pixel display with backlight
Headset Port	3.5mm jack for hands-free operation
Power Adapter Port	For external power (if PoE not available)
EHS Cable Support	Compatible with Yealink EHS36 for wireless headsets
HOLD	Places active call on hold
MUTE	Mutes microphone during calls
VOLUME	Adjusts handset, speaker, and ringer volume
NAVIGATION KEYS	Navigate menus and call lists

Installation

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

Connect to Network: Use Ethernet cable to connect LAN port to router/switch. For PoE, ensure switch supports 802.3af.
Connect Handset: Plug handset cord into dedicated port on back of phone.
Connect Headset: Optional 3.5mm plug into headset jack.
Power: Use PoE or connect external power adapter to DC port.

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

First-Time Setup

Power on phone; follow on-screen prompts.

Network Boot: Phone will attempt to obtain IP via DHCP automatically.
Check IP Address: Press OK > Status > Network to view assigned IP.
Provisioning: Enter configuration server URL via web interface or keypad.
Basic Settings: Set time zone, language (default ENGLISH), and ring tone.

CAUTION! Do not disconnect power during firmware upgrade. Ensure stable network connection.

Specifications

Display: 132x64 pixel graphical LCD with backlight.
Network: Dual 10/100/1000 Mbps Ethernet, PoE 802.3af.
Audio: HD handset and speakerphone, Opus, G.722, G.711 codecs.
Ports: 2x RJ45 Ethernet, RJ9 handset, 3.5mm headset, DC power.
Protocols: SIP RFC3261, TCP/IP, DNS, DHCP, HTTP/HTTPS.
Supported Features: Call hold/transfer/waiting, 3-way conference, auto-provisioning.
Power Source: PoE (802.3af) or 12V DC adapter.
Operating Temp: 0°C to 40°C (32°F to 104°F).

Controls and Settings

Access menu via OK button. Front Keys: HOLD, MUTE, VOLUME UP/DOWN, NAVIGATION, HEADSET, SPEAKERPHONE.

Keypad: 0-9, *, #, plus dedicated function keys.

Settings via LCD Menu: Phone Status, Call History, Directory, Settings (Audio, Display, Network, Security). Web Interface: Advanced configuration at phone's IP address (default user/password: admin/admin). Audio: Adjust handset, speaker, ringer volume; select codec priority. Network: Static/DHCP, VLAN, QoS. Security: Admin password, SIP authentication.

Connecting Devices

Network: LAN port to switch. PC: Use PC port to daisy-chain computer. Headset: 3.5mm plug.

Turn off phone before connecting additional devices.
Match cables to correct ports (Ethernet to LAN, handset to RJ9).
For PoE, ensure switch provides adequate power (max 12.95W).

Tip: Use Cat5e or higher Ethernet cables for Gigabit performance.

Call Management

Supports basic and advanced call features.

Make Call: Lift handset or press SPEAKERPHONE, dial number.
Answer Call: Lift handset, press SPEAKERPHONE, or press corresponding line key.
Hold: Press HOLD during active call.
Transfer: Press TRANSFER, dial target number, press TRANSFER again.
Conference: During call, press CONFERENCE, dial second party, press CONFERENCE to merge.
Call History: Press OK > Call History to view missed/received/dialed calls.
Directory: Store up to 500 contacts via web interface or phone menu.
Redial: Press REDIAL or navigate to call history.

WARNING! Emergency calls may require proper SIP trunk configuration. Test with provider.

Accessibility Features

Visual: Adjust LCD contrast, backlight timeout. Audio: Adjustable ring tones and volumes, hearing aid compatible (HAC) handset. Physical: Large, tactile keypad buttons.

Care & Cleaning

Unplug power before cleaning. Use slightly damp, lint-free cloth. Do not use abrasive cleaners or solvents.

CAUTION! Avoid liquids near ports. Keep away from direct heat sources.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential installation. CE, RCM, UKCA marked. Contains FCC ID: 2ADUI-T21PE2. For support, visit www.yealink.com or contact your authorized Yealink distributor. Software copyright © Yealink Inc.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	PoE/Power adapter	Check PoE switch; ensure power adapter is connected and outlet works.
No network	Cable/DHCP	Check Ethernet cable; verify DHCP server is reachable; try static IP.
No dial tone	SIP registration	Check SIP server settings and credentials; verify network connectivity.
Poor audio quality	Network/Codec	Check for network jitter/packet loss; adjust QoS settings; try different codec.
Phone not provisioning	Configuration server	Verify provisioning URL; check firewall allows access to config server.

Reset: Press and hold OK for 10 seconds during boot to factory reset (erases all settings).

Service: Contact Yealink support or authorized service center. Do not attempt internal repairs.