Yealink SIP-T77U Ultra-Business Gigabit IP Phone, 7" Color Touchscreen, 16 VoIP Accounts, 84 DSS Keys, Dual USB (USB-A & USB-C), 3W Speaker | SIP-T77U

The Yealink SIP-T77U sets a new benchmark for executive desktop telephony, serving as the flagship model of Yealink’s next-generation T7X series. Replacing legacy mechanical button arrays with a responsive 7-inch 800×480 capacitive color touchscreen, it offers a modern, smartphone-like user interface complete with customizable Light/Dark Themes and Accessibility Mode. Designed for demanding multi-line workflows, it combines 16 VoIP lines with dual-port Gigabit connectivity and flexible USB-A/USB-C expansion.

• Key Features

7" Backlit Color Touchscreen: Large 800×480-pixel capacitive touch display enables intuitive swipe navigation, visual call management, and instant access to 84 programmable one-touch DSS/BLF keys.

Dual USB 2.0 Ports (Type-A & Type-C): Integrated USB-A and USB-C ports allow simultaneous use of any two peripherals—including USB headsets, USB call recording, WF50 Wi-Fi, or BT41/BT51 Bluetooth adapters—plus support for up to 3 EXP55 color expansion modules (adding up to 234 additional keys).

3W Speakerphone & AI Noise Cancellation: High-output 3W speaker paired with Yealink Optima HD Voice, AI-tuned Noise Filtering, and Optimized Acoustic Shield eliminates background office noise for crystal-clear hands-free calls.

Linux 6.1 & Three Rings of Security: Fortified with Linux 6.1 OS, Trusted Execution Environment (TEE) hardware encryption, TLS 1.3, SRTP, WPA3, and dual-firmware image protection to prevent system downtime.

Dual-Port Gigabit Ethernet with PoE: Two 10/100/1000 Mbps switched RJ45 ports provide full Gigabit workstation passthrough with IEEE 802.3af Class 3 Power over Ethernet (Note: 5V/2A AC power adapter sold separately).

• Performance / Technology

Built on Yealink's "Three Rings of Security" architecture, the SIP-T77U protects enterprise communications across device startup (TEE hardware encryption and secure boot), network access (802.1x and WPA3), and media transmission (TLS 1.3 and SRTP). Its dual firmware images safeguard the phone against bricking during remote power interruptions. Audio performance is driven by AI-tuned noise cancellation algorithms and wideband codecs (G.722) that isolate the speaker's voice while muting ambient distractions.

• Design & Ergonomics

Engineered with an ultra-slim, modern silhouette, the SIP-T77U eliminates physical line-key clutter in favor of a clean touchscreen bezel and illuminated touch controls. A wear-free magnetic Hall-effect hookswitch ensures long-term durability when lifting and docking the Hearing Aid Compatible (HAC) handset. The adjustable multi-angle desktop stand allows executives to tilt the 7-inch display to minimize overhead office glare, while optional wall-mount compatibility preserves desk space.

• Compatibility / Use Cases

Running Yealink T7X Unified Firmware (shared across the T73U, T73W, T74U, T74W, T77U, and T77W), the SIP-T77U streamlines IT deployment via Zero-Touch provisioning on Yealink YDMP/YMCS and Unified Auto-P templates. Fully interoperable with 3CX, Broadsoft Broadworks, Yeastar, Grandstream, Asterisk, and FreePBX, it is the premier choice for C-level executives, front-desk receptionists, call dispatchers, and enterprise branch offices.

• Why This Product Stands Out

While standard color IP phones limit users to a single USB-A port and physical page-scrolling buttons, the Yealink SIP-T77U delivers a 7-inch touchscreen with 84 on-screen DSS keys alongside both USB-A and USB-C ports. Combined with its 3W speakerphone and Linux 6.1 TEE hardware encryption, it serves as the direct, modernized successor to the bestselling Yealink SIP-T48U.