Yealink T33G User Manual

The Yealink T33G is an entry-level IP phone designed for small businesses and home offices, featuring a 2.8-inch color LCD screen, dual Gigabit Ethernet ports, PoE support, HD voice, 3 SIP accounts, and support for wideband audio. It offers easy deployment, intuitive user interface, and compatibility with major SIP-based IP-PBX and service platforms. 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. Phone Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Handset, Base Unit, Stand, Power Adapter, Network Cable, Quick Start Guide.

Feature	Description
Display	2.8-inch color LCD (320 x 240 pixels)
Network Ports	Dual 10/100/1000 Mbps Ethernet (LAN & PC)
Power	IEEE 802.3af PoE or AC adapter (included)
Audio	HD handset and speakerphone, wideband audio support
Accounts	Up to 3 SIP accounts
Codecs	G.722, G.711, G.729, G.726, iLBC, Opus
Headset	RJ9 headset port (optional)
Conference	3-way audio conference
Security	SRTP, TLS, 802.1x
Firmware	Upgradable via web interface or TFTP

Installation

Unpack and inspect contents. Place on stable surface.

Connect 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 AC power adapter.
Connect handset: Plug handset cord into handset port.
Connect headset (optional): Plug into RJ9 headset port.

WARNING! Use only approved power adapter. Ensure proper ventilation.

First-Time Setup

Power on phone; follow on-screen prompts.

Network configuration: Phone obtains IP via DHCP by default. Check IP via Menu > Status.
Account configuration: Access web interface (http://[phone-IP]) or use phone menu to enter SIP server, username, password.
Set language: In Settings > Basic > Language, select preferred language.
Date and time: Configure via NTP server or manual setting.
Test call: Make a test call to verify registration and audio.

CAUTION! Keep phone away from liquids and extreme temperatures.

Specifications

Display: 2.8-inch TFT color LCD, 320 x 240 pixels.
Network: Dual 10/100/1000 Mbps Ethernet, IEEE 802.3af PoE.
Protocols: SIP (RFC3261), TCP/IP, UDP, RTP, RTCP, DNS, DHCP, NTP.
Audio Codecs: G.722, G.711 (A/µ-law), G.729AB, G.726, iLBC, Opus.
QoS: Layer 2 QoS (802.1Q, 802.1p), Layer 3 QoS (ToS, DiffServ).
Power Supply: 100-240V AC, 50/60Hz; 5V DC, 0.6A.
Operating Temp: 0°C to 40°C (32°F to 104°F).
Humidity: 10% to 90% non-condensing.

Controls and Settings

Access menu via OK button or web interface. Front Panel: LCD, Navigation keys, OK, Cancel, Hold, Mute, Headset, Speakerphone, Volume keys.

Keys: Line keys (3), Navigation (up/down/left/right), Soft keys (context-sensitive).

Phone Settings: Language, time, ringtone, screen saver. Account Settings: SIP server, display name, authentication. Audio Settings: Handset volume, speaker volume, ring volume. Network Settings: IP configuration, VLAN, QoS. Advanced: Firmware upgrade, restore factory defaults.

Connecting Devices

Network: LAN port to network switch. PC: PC port to computer. Headset: RJ9 port to headset.

Turn off phone before connecting cables if not using hot-plug.
Match cables to ports (Ethernet to LAN/PC, RJ9 to headset).
Ensure cables are securely connected.

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

Phone Features

Supports call handling, conferencing, call forwarding, etc.

Make call: Lift handset or press Speakerphone, dial number, press Dial soft key.
Answer call: Lift handset or press Answer soft key.
Hold call: Press Hold key; resume by pressing Resume soft key.
Transfer call: During call, press Transfer, dial target, press Transfer again.
Conference: During call, press Conference, dial second party, press Conference again to merge.
Call forward: Configure via phone menu or web interface (always, busy, no answer).
Call history: Press Directory key to view missed, received, placed calls.
Speed dial: Assign numbers to line keys or speed dial entries.

WARNING! Do not disassemble phone; no user-serviceable parts inside.

Accessibility Features

Visual alerts: LED indicators for line status. Audio adjustments: Independent volume controls for handset, speaker, ringer. High-contrast display: Adjustable brightness and contrast.

Care & Cleaning

Unplug before cleaning. Use dry, soft cloth; do not use liquids or abrasive cleaners.

CAUTION! Avoid spraying cleaners directly on phone; keep away from heat sources.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential use. CE, RCM, UKCA marked. For EU, complies with RoHS Directive 2011/65/EU. Copyright © Yealink Inc. For support, visit www.yealink.com or contact your service provider.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No display	Power/connection	Check power adapter/PoE; ensure cables secure; reboot phone.
No dial tone	Network/SIP registration	Check network connection; verify SIP account settings; contact provider.
One-way/no audio	Network/QoS settings	Check firewall/NAT settings; configure QoS properly; test with direct connection.
Cannot access web interface	IP address/firewall	Verify phone IP address; disable firewall on PC; use correct credentials (admin/admin).
Phone not registering	Account credentials/server	Check username/password; verify SIP server address/port; ensure network allows SIP traffic.

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

Service: Contact service provider or visit www.yealink.com for firmware and documentation.