Yealink SIP T33G Manual

The Yealink SIP T33G is a business-grade IP phone designed for small to medium-sized businesses, featuring a 3.3-inch color LCD display, dual Gigabit Ethernet ports, PoE support, HD voice, 3-way conferencing, built-in Bluetooth, Wi-Fi capability (with optional module), and support for up to 16 SIP accounts. It offers easy deployment, intuitive user interface, and robust features for modern VoIP communication. Below are key sections for 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: 3.3-inch color LCD, Handset, Ethernet ports, Power adapter port, Headset jack, Bluetooth/Wi-Fi capability.

Feature	Description
Display	3.3-inch color LCD with 320 x 240 resolution
Network Ports	Dual Gigabit Ethernet (LAN/PoE + PC)
Power over Ethernet (PoE)	IEEE 802.3af compliant
Audio	HD voice, wideband audio support
Bluetooth	Built-in for headset pairing
Wi-Fi	Optional module (802.11 b/g/n)
Conference	3-way audio conferencing
SIP Accounts	Up to 16 SIP accounts supported
Headset Port	3.5mm jack for wired headset
Programmable Keys	2 line keys + 5 programmable keys

Installation

Unpack and inspect contents. Place on stable surface.

Connect Network: Use Ethernet cable to connect LAN/PoE port to router/switch.
Connect PC (optional): Use second Ethernet port to connect to computer.
Power the phone: Use PoE from switch or connect power adapter to DC port.
Connect Handset: Plug handset cable into 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 obtain IP via DHCP by default. Check IP address in Menu > Status.
Configure SIP accounts: Access web interface (via IP) or use phone menu to enter SIP server details.
Set language: In Settings > Basic > Preferences, select language (default English).
Set time and date: Configure via NTP or manual entry.
Test call: Make a test call to verify registration and audio.

CAUTION! Keep phone away from direct heat sources and liquids.

Specifications

Display: 3.3-inch color TFT LCD, 320 x 240 pixels.
Network: Dual 10/100/1000 Mbps Ethernet, PoE (802.3af), optional Wi-Fi.
Protocols: SIP RFC3261, TCP/IP, UDP, RTP, RTCP, HTTP/HTTPS, DNS.
Audio Codecs: G.711, G.722, G.726, G.729, Opus.
Bluetooth: Version 4.2, HSP/HFP/A2DP profiles.
Conference: 3-way audio conferencing.
Power Supply: 100-240V AC, 50-60Hz; 5V DC, 0.6A adapter or PoE.
Operating Temp: 0°C to 40°C (32°F to 104°F).

Controls and Settings

Access menu via navigation keys. Front Panel: LCD, navigation keys, soft keys, speakerphone, volume keys, mute.

Keys: Hold, Transfer, Conference, Directory, Message, Headset, Mute, Volume up/down, Navigation pad.

Basic Settings: Language, time/date, ringtone, screen saver. Network: IP configuration, VLAN, QoS. Account: SIP server, username, password, display name. Audio: Handset/headset volume, ring volume, codec priority. Features: Call forward, DND, auto answer, BLF.

Connecting Devices

Network: Ethernet to router/switch. PC: Second Ethernet port. Headset: Wired via 3.5mm jack or Bluetooth wireless.

Turn off phone before connecting cables if using power adapter.
For PoE, ensure switch provides 802.3af power.
Pair Bluetooth headset via Menu > Bluetooth > Search.
Install optional Wi-Fi module in expansion slot if needed.

Tip: Use quality Ethernet cables for reliable connectivity.

Advanced Features

Supports advanced VoIP features for business use.

Call Handling: Hold, transfer, forward, 3-way conference.
Directory: Local and corporate directory access.
Call History: Missed, received, placed calls.
BLF (Busy Lamp Field): Monitor extension status on programmable keys.
Music on Hold: Configure audio source for held calls.
VPN Support: Connect securely to corporate network.
XML Browser: Custom applications and directories.
Firmware Upgrade: Via web interface or TFTP.

WARNING! Do not attempt firmware upgrade during active calls.

Accessibility Features

Visual: Adjustable screen contrast, large font option. Audio: Adjustable ring volume, distinct ringtones, hearing aid compatible handset. Physical: Tactile key feedback, headset support for hands-free operation.

Care & Cleaning

Unplug before cleaning. Use slightly damp, lint-free cloth; do not use liquids or aerosols directly on phone.

CAUTION! Do not spray cleaning agents on screen or keys. Keep away from moisture.

Regulatory Information

FCC Part 15: Class B digital device; complies with interference limits for residential use. CE, RCM, UKCA marked. Contains FCC ID: 2ABAP-T33G. For support, visit www.yealink.com or contact your service provider. Copyright © Yealink Inc. All rights reserved.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power	Power source/cable	Check power adapter/PoE switch; ensure cable is connected securely.
No network	Cable/DHCP	Check Ethernet cable; verify DHCP is enabled on router; restart phone.
No registration	SIP credentials	Verify SIP server address, username, password; check network firewall.
No audio	Network/audio settings	Check QoS settings; verify codec compatibility; adjust volume/mute.
Bluetooth not pairing	Distance/pairing mode	Ensure headset in pairing mode; keep within 10 meters; restart pairing.

Reset: Press and hold OK key during boot for factory reset (use with caution).

Service: Contact service provider or visit www.yealink.com/support.