Manual Yealink T21P E2

The Yealink T21P E2 is a business IP phone designed for small to medium-sized businesses, featuring a 2-line LCD display, dual Ethernet ports with PoE support, HD voice quality, support for up to 2 SIP accounts, built-in speakerphone, headset compatibility, and advanced telephony features like call hold, transfer, 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 Telephony Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

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

Feature	Description
LCD display	2-line backlit display for call information and menus
Dual Ethernet ports	LAN and PC ports for network pass-through
PoE support	Power over Ethernet (802.3af) for simplified installation
HD voice	Wideband audio for superior call clarity
Speakerphone	Full-duplex hands-free communication
Headset jack	3.5mm jack for headset connectivity
Message Waiting Indicator	LED for voicemail notifications
Programmable keys	Customizable keys for speed dial or features
Volume controls	Separate controls for handset, speaker, and ringer
Power adapter port	For external power if PoE is not available

Installation

Unpack and inspect contents. Place on stable surface.

Connect to network: Use Ethernet cable to connect LAN port to router/switch.
Connect PC (optional): Use second Ethernet cable from PC port to computer.
Power the phone: Use PoE from switch or connect power adapter to port.
Connect handset: Plug coiled cord into handset and phone jack.
Connect headset (optional): Plug into 3.5mm headset jack.

WARNING! Use only approved power adapter. Ensure cables are securely connected.

First-Time Setup

Power on phone; follow on-screen prompts.

Network configuration: Phone will attempt DHCP; check IP address on screen.
SIP account configuration: Enter SIP server, username, password via web interface or phone menu.
Set language: In settings menu, select preferred language.
Adjust audio settings: Set ringer volume, handset volume, and speaker volume.
Test call: Make a test call to verify configuration.

CAUTION! Configure SIP credentials correctly for service activation.

Specifications

Display: 2-line LCD with backlight.
Network: Dual 10/100 Mbps Ethernet ports, PoE (802.3af).
Voice Codecs: G.711, G.722, G.726, G.729.
SIP Accounts: Up to 2 accounts.
Telephony Features: Call hold, transfer, conference, redial, mute, DND.
Audio: HD handset and speakerphone, headset support.
Power Source: PoE or 5V DC power adapter.
Operating Temp: 0°C to 40°C.
Protocols: SIP RFC3261, TCP/IP, UDP, RTP, RTCP, DNS, DHCP, NTP.

Controls and Settings

Access menu via MENU button. Keypad: Numeric keys, NAVIGATION arrows, OK, CANCEL, MENU, HOLD, TRANSFER, CONFERENCE, REDIAL, MUTE, SPEAKERPHONE, VOLUME UP/DOWN.

Display indicators: Line status, message waiting, mute, speakerphone.

Settings via phone menu: Network (IP, DHCP), Account (SIP server, authentication), Audio (volumes, ring tones), Time (NTP server), Features (call forward, DND). Web interface: Advanced configuration via browser at phone's IP address.

Connecting Devices

Network: LAN port to router. PC: PC port to computer. Headset: 3.5mm jack.

Turn off devices before connecting cables.
Use standard Ethernet cables (Cat5e or higher).
For PoE, ensure switch supports 802.3af.
For headset, use compatible 3.5mm CTIA headset.

Tip: Label cables for easy identification.

Advanced Telephony Features

Supports standard and advanced call features.

Make call: Lift handset or press SPEAKERPHONE, dial number.
Answer call: Lift handset or press SPEAKERPHONE or corresponding line key.
Hold: Press HOLD during call; resume by pressing same line key.
Transfer: Press TRANSFER, dial target, press TRANSFER again to complete.
Conference: During call, press CONFERENCE, dial second party, press CONFERENCE to merge.
Redial: Press REDIAL to call last dialed number.
Mute: Press MUTE during call to mute microphone.
DND: Enable via menu or programmable key to silence ringer.
Call forward: Set via menu to forward calls to another number.

WARNING! Ensure proper SIP configuration for advanced features.

Accessibility Features

Adjustable ringer volume and tone. Visual indicators for call and message waiting. Headset mode for hands-free operation.

Care & Cleaning

Unplug before cleaning. Use dry, soft cloth; avoid liquids and abrasive cleaners.

CAUTION! Do not use solvents; keep away from extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits. CE marked. For support, visit www.yealink.com or contact your service provider.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power source/cable	Check PoE switch or power adapter; ensure cable is connected.
No network connection	Cable/DHCP	Check Ethernet cable; verify DHCP is enabled on network.
No dial tone	SIP account	Verify SIP account configuration; check with service provider.
Poor audio quality	Network/codec	Check network bandwidth; adjust codec settings.
Display blank	Power/backlight	Check power; adjust display backlight timeout in settings.

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

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