Yealink SIP T33G User Manual

The Yealink SIP T33G is a feature-rich business IP phone designed for small to medium-sized businesses. It supports 3 SIP lines, HD voice, PoE, dual Gigabit Ethernet ports, and a high-resolution graphical display. 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 Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: High-resolution graphical LCD, 3 programmable line keys, HD handset, Ethernet ports, PoE support.

Feature	Description
Display	3.5-inch 320x240 graphical LCD with backlight
Lines	Supports up to 3 SIP accounts
HD Voice	Wideband audio for superior call quality
Network	Dual Gigabit Ethernet ports (LAN/PoE, PC)
Power	IEEE 802.3af PoE or external power adapter
Headset Port	3.5mm jack for headset connectivity
Speakerphone	Full-duplex hands-free speaker
Codecs	G.722, G.711, G.729, iLBC, Opus
Firmware	Upgradable via web interface or TFTP
Security	SRTP, TLS, 802.1x

Installation

Unpack and inspect contents. Place on stable surface.

Connect to Network: Use Ethernet cable to connect LAN/PoE port to switch/router.
Connect PC: Use second Ethernet port to connect to computer if needed.
Power the Phone: Use PoE from switch or connect external power adapter.
Connect Handset: Plug handset cable into dedicated port.
Connect Headset: Optional 3.5mm headset connection.

WARNING! Use only approved power adapter. Ensure network 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 Setup: Access web interface via IP address or use phone menu to configure SIP accounts.
Date & Time: Set automatically via NTP or manually in settings.
Language: Select preferred language (default ENGLISH).
Test Call: Make a test call to verify configuration.

CAUTION! Keep phone away from heat sources and liquids.

Specifications

Display: 3.5-inch graphical LCD, 320x240 resolution.
Network: Dual 10/100/1000 Mbps Ethernet ports.
Protocols: SIP RFC3261, TCP/IP, UDP, RTP, RTCP, DHCP, DNS.
Audio Codecs: G.722, G.711μ/a, G.729, iLBC, Opus.
Power: IEEE 802.3af PoE or 12V DC power adapter.
Dimensions: 200mm x 200mm x 65mm (WxDxH).
Weight: 0.8 kg.
Operating Temp: 0°C to 40°C.
Humidity: 10% to 90% non-condensing.

Controls and Settings

Access menu via navigation keys or web interface. Front Panel: LCD, soft keys, navigation pad, volume keys, mute, headset, speakerphone.

Key Functions: Line keys, Hold, Transfer, Conference, Voicemail, Directory, Menu.

Settings: Phone (language, time), Accounts (SIP configuration), Audio (volume, ringtone), Network (IP settings), Security (passwords). Web Interface: Advanced configuration via browser at phone's IP address.

Connecting Devices

Network: LAN/PoE port to network switch. PC: PC port to computer. Handset: Standard RJ9 connector. Headset: 3.5mm jack.

Turn off phone before connecting cables if using power adapter.
Match cables to correct ports.
Power on and verify network connectivity.

Tip: Use quality Ethernet cables for reliable Gigabit performance.

Advanced Features

Supports call forwarding, call waiting, three-way conference, auto attendant.

Call Transfer: During call, press Transfer, enter number, press Transfer again.
Conference Call: During first call, press Conference, dial second party, press Conference to merge.
Call Forward: Menu > Features > Call Forward > enable and set number.
Directory: Store up to 500 contacts locally.
Call History: View missed, received, placed calls.
Speed Dial: Assign numbers to programmable keys.
Music on Hold: Configure via web interface.
BLF: Busy Lamp Field for monitoring extension status.

WARNING! Do not disassemble phone. Contact support for service.

Accessibility Features

Adjustable ring volume, visual ring indicator, headset mode, adjustable LCD contrast, hearing aid compatible (HAC) handset.

Care & Cleaning

Unplug before cleaning. Use dry, soft cloth only; no liquids or abrasive cleaners.

CAUTION! Do not spray liquids directly on phone; avoid extreme temperatures.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. CE, RCM, UKCA marked. For support, visit www.yealink.com or contact authorized distributor. Copyright © Yealink Inc. All rights reserved.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power source	Check PoE switch or power adapter connection; try different outlet.
No network	Cable/DHCP	Check Ethernet cable; verify DHCP is enabled on network.
No dial tone	SIP configuration	Verify SIP account settings; check username, password, server.
One-way audio	Firewall/NAT	Configure SIP ALG on router; check RTP settings.
Poor call quality	Network/Codec	Check network bandwidth; try different codec (G.711).
Display issues	Settings	Adjust contrast in menu; restart phone.

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

Service: Contact Yealink support or authorized service center.