Yealink Phone T41S User Manual

The Yealink T41S is a feature-rich SIP desk phone designed for business environments. It offers high-definition voice quality, a large color display, support for up to 16 SIP accounts, PoE (Power over Ethernet), integrated Gigabit Ethernet switch, and a wide range of telephony features including call hold, transfer, conference, and advanced call management. 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 Call Features 8. Accessibility Features 9. Care & Cleaning 10. Regulatory Information 11. Troubleshooting

Features at a Glance

Key components: Large 3.5-inch 320x240 color LCD, Handset with HD voice, Ethernet ports (LAN and PC), Headset jack, Volume keys, Programmable keys.

Feature	Description
HD Voice	Wideband audio for superior call clarity
Display	3.5-inch color LCD with adjustable angle
Network	Dual Gigabit Ethernet ports with integrated switch
Power	Supports 802.3af PoE or external power adapter
SIP Accounts	Up to 16 SIP lines/accounts
Programmable Keys	Up to 27 programmable keys for speed dial/BLF
Headset Port	3.5mm jack for headset connectivity
Codecs	G.722, G.711, G.729, G.726, iLBC, Opus
Conference	Built-in 3-way audio conference
Security	SRTP, TLS, 802.1x

Installation

Unpack and inspect contents. Place on stable desk surface.

Connect to Network: Plug Ethernet cable from your router/switch into the LAN port.
Connect PC (Optional): Plug PC Ethernet cable into the PC port for pass-through.
Connect Handset: Plug the handset cord into the dedicated jack.
Apply Power: Use PoE from switch or connect the included power adapter to the DC port.

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

First-Time Setup

Power on the phone; follow on-screen prompts.

Network Boot: Phone will attempt to get IP via DHCP. Check IP address on screen (Menu > Status).
Configure SIP Account: Enter SIP server, username, password provided by your service provider via web interface (http://[phone-ip]) or phone menu.
Set Language: In Settings > Basic > Preferences, select language (default ENGLISH).
Set Time & Date: Configure via NTP or manually in Settings.
Test Call: Make a test call to verify registration and audio.

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

Specifications

Display: 3.5-inch TFT color, 320 x 240 pixels.
Network Interfaces: Dual 10/100/1000 Mbps Ethernet (RJ45).
Protocols: SIP (RFC3261), TCP/IP, UDP, RTP, RTCP, HTTP/HTTPS, DNS, DHCP.
Audio Features: HD handset and speakerphone, Acoustic Echo Cancellation (AEC).
Programmable Keys: 27 keys (physical and on-screen) for line, speed dial, BLF, etc.
Power Supply: 802.3af PoE or 12V DC, 0.5A power adapter.
Operating Environment: 0°C to 40°C, 10% to 90% humidity (non-condensing).
Supported Services: Call forward, transfer, hold, park, pickup, conference, voicemail.

Controls and Settings

Access menu via the "Menu" key or web interface (http://[phone-ip]). Front Keys: MUTE, HEADSET, SPEAKERPHONE, NAVIGATION, VOLUME, PROGRAMMABLE KEYS.

Basic Operations: Lift handset or press SPEAKERPHONE to get dial tone. Use keypad to dial. Press "OK" to answer incoming call.

Settings via Phone Menu: Account configuration, Network settings (static/DHCP), Audio settings (ringer, volume), Time settings, Screen settings (contrast, backlight). Web Interface: Advanced configuration for SIP parameters, security (TLS/SRTP), firmware upgrade, call features.

Connecting Devices

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

Turn off power before connecting cables if not using PoE.
Match cables to ports (Ethernet to LAN, handset to handset icon).
For headset use, plug into 3.5mm jack and press HEADSET key to toggle mode.

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

Advanced Call Features

Supports standard and advanced PBX features.

Call Hold: Press the "Hold" key during a call.
Call Transfer: Press "Transfer", dial target number, press "Transfer" again (blind) or wait for answer then press (attended).
Conference: During a call, press "Conf", dial second party, after answer press "Conf" to merge.
Call Forward: Configure via phone menu or web interface (always, busy, no answer).
Speed Dial: Assign numbers to programmable keys.
BLF (Busy Lamp Field): Monitor extension status on programmable keys.
Voicemail: Press the "Messages" key or dial voicemail access number.

WARNING! Do not use the phone in high-moisture environments. Unplug during electrical storms.

Accessibility Features

Visual Alerts: Flashing LED for missed calls/messages. Audio Adjustments: Independent volume controls for handset, speaker, ringer. High-Contrast Display: Adjustable screen settings for better visibility.

Care & Cleaning

Unplug power before cleaning. Use a soft, dry cloth. For stubborn marks, dampen cloth slightly with water only. Do not use solvents or abrasives.

CAUTION! Never spray liquids directly on the phone. Keep vents clear of obstructions.

Regulatory Information

FCC Part 15: Class B digital device; complies with limits for residential installation. CE, RCM, UKCA marked. This device complies with Industry Canada license-exempt RSS standard(s). Copyright © Yealink Inc. For support, visit www.yealink.com or contact your authorized reseller.

Troubleshooting

Symptom	Possible Cause	Corrective Action
No power/no display	Power source/cable	Check power adapter connection; try different outlet; verify PoE switch is enabled.
No network connectivity	Ethernet cable/DHCP	Check cable at both ends; restart phone and router; verify DHCP server is reachable.
No dial tone/cannot register	SIP configuration	Verify SIP account details (server, user, password); check network firewall settings.
One-way/no audio	Network/audio settings	Check router QoS settings; disable SIP ALG on router; verify audio codec negotiation.
Poor audio quality	Network congestion/cable	Ensure sufficient bandwidth; replace Ethernet cable; adjust jitter buffer in web settings.
Keys not responding	Software glitch	Restart the phone (unplug power). If persistent, perform factory reset (Menu > Settings > Advanced > Factory Reset).

Factory Reset: Press and hold "OK" key while powering on, or via web interface.

Service: Contact your system administrator or visit www.yealink.com/support.