12-Line Gigabit SIP Phone with Dual USB Expansion
The Yealink T42U is a mid-level IP desk phone combining robust functionality with user-friendly design. It’s equipped for modern business environments with dual Gigabit Ethernet ports, Power over Ethernet (PoE) support, and a crisp 2.7″ grayscale display for clear navigation. With 12 programmable line keys, HD audio powered by Yealink’s Optima HD Voice and Opus codec, and optional wireless add-ons via dual USB ports, the T42U delivers premium call quality and flexible connectivity options—making it ideal for busy professionals, receptionists, and knowledge workers.
Key Features
12 Programmable Line Keys & Expandability
Configure up to 12 SIP lines or speed-dial presets via six labeled line keys capable of supporting three pages of settings. With dual USB ports (supports two USB dongles simultaneously), the T42U easily integrates Bluetooth, Wi-Fi, headset, or call recording accessories for flexible workflows.
Optima HD Voice & Opus Codec Support
Experience crystal-clear conversation quality with broad-band codecs (Opus) and Yealink’s Optima HD Voice. Acoustic features like full-duplex speakerphone, acoustic echo cancellation (AEC), noise suppression, and comfort-noise generation ensure excellent speech even in noisy office environments.
Intuitive 2.7″ Grayscale Display
Navigate features and read caller info clearly on the backlit 2.7‑inch screen (192×64 pixels), which offers easy menu interaction and soft key functionality. LED indicators keep you informed of line statuses and messages.
Gigabit Ethernet & PoE Support
Stay connected with high-speed dual-port Gigabit Ethernet and power the unit via PoE (IEEE 802.3af)—minimizing desk clutter while maintaining fast data access.
Enterprise-Grade Security & Provisioning
Secure calls and streamline setup with support for TLS 1.3, SRTP, HTTPS/HTTPS-based provisioning, Auto PnP, TR-069, and RESTful APIs—ideal for centralized deployment and robust protection.
What’s in the Box
- Yealink T42U IP Phone
- Handset with coiled cord
- Ethernet (CAT5e) cable
- Desk stand
- Quick Start Guide
- Wall-mount bracket (optional accessory)
FAQ’s
Can this phone support Bluetooth or Wi-Fi?
Absolutely—by adding optional USB dongles (BT40/BT41 for Bluetooth, WF40/50 for Wi-Fi), you can seamlessly integrate wireless peripherals
How many SIP lines can I configure?
You can register up to 12 SIP accounts, mapped across six programmable line keys (with three-page view)
Is PoE supported?
Yes, the T42U supports IEEE 802.3af PoE, allowing power over Ethernet to reduce desk clutter.
Does it offer secure provisioning?
Yes, the phone supports TLS 1.3, SRTP, HTTPS provisioning, Auto PnP, TR-069, and RESTful API, ideal for secure enterprise deployment
What codecs are available?
Supports high-definition codecs including Opus, G.722, G.711, and AMR-WB for superior call clarity.
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