Yealink SIP-T77U Gigabit Business IP Desk Phone

The Yealink SIP-T77U Gigabit Business IP Desk Phone is a premium enterprise communication solution designed for executives, receptionists, administrative assistants, operators, and high-volume call users who require advanced call handling capabilities, enterprise-grade security, and exceptional voice quality. Built on a secure Linux-based platform, the SIP-T77U combines a large color display, extensive programmable key capacity, and powerful productivity features to streamline communications in demanding business environments.

Designed for users who rely on fast access to contacts, extensions, speed dials, and Busy Lamp Field (BLF) monitoring, the SIP-T77U features a large color display flanked by dual rows of programmable line keys with dual-color LED indicators. This layout provides immediate visibility into call activity while simplifying call transfers, monitoring, and extension management.

Supporting up to 16 SIP accounts and up to 27 programmable DSS keys, the SIP-T77U is ideal for reception desks, executive assistants, call centers, and users who manage large volumes of inbound and outbound calls. The expanded key layout improves productivity by placing frequently used functions directly at the user’s fingertips.

Advanced audio technologies including Yealink Acoustic Shield and Smart Noise Filtering help eliminate background distractions and ensure crystal-clear conversations. Whether operating in a busy office, call center, or reception area, users benefit from professional-grade voice quality and enhanced communication clarity.

Built with enterprise security in mind, the SIP-T77U features a Trusted Execution Environment (TEE), Secure Boot, firmware encryption, and TLS 1.3 support to help protect communications and meet modern corporate security requirements.

Two USB-A ports provide flexible connectivity for USB headsets, call recording devices, and expansion modules. Dual Gigabit Ethernet ports with Power over Ethernet (PoE) support ensure reliable network performance while simplifying installation and reducing cable requirements.

Combining advanced call management, enterprise security, and superior voice quality, the Yealink SIP-T77U is an ideal communication platform for organizations that require a powerful wired business phone solution.

Features

Large backlit color display
Supports up to 16 SIP accounts
Up to 27 programmable DSS keys
Dual-color LED line indicators
Yealink Acoustic Shield technology
Smart Noise Filtering
Trusted Execution Environment (TEE)
Secure Boot and firmware encryption
TLS 1.3 security support
Dual USB-A ports
USB headset support
USB call recording support
Supports up to 3 expansion modules
Dual-port Gigabit Ethernet
Power over Ethernet (PoE) support
Linux-based operating system
HD voice technology
Includes 1-Year Warranty

Specifications

Phone Type:
- Gigabit Business IP Desk Phone
Operating System:
- Linux-Based Platform
Accounts:
- Up to 16 SIP Accounts
Programmable Keys:
- Up to 27 DSS Keys
- Dual-Color LED Indicators
Audio:
- Yealink Acoustic Shield
- Smart Noise Filtering
- HD Voice Technology
Network:
- Dual-Port Gigabit Ethernet
USB:
- 2 x USB-A Ports
- USB Headset Support
- USB Call Recording
Expansion:
- Supports Up To 3 Expansion Modules
Security:
- Trusted Execution Environment (TEE)
- Secure Boot
- Firmware Encryption
- TLS 1.3 Support
Power:
- IEEE 802.3af Power over Ethernet (PoE)

Compatibility

Compatible with SIP-based hosted VoIP services and SIP-compatible IP PBX systems.

Compatible accessories include:

Yealink Expansion Modules
USB Headsets
USB Storage Devices for Call Recording
Bluetooth USB Adapters
Wi-Fi USB Adapters

Please verify compatibility with your hosted service provider or phone system before deployment.

Upgrade Options

For users who require built-in wireless connectivity and larger displays, consider:

Yealink SIP-T85W Gigabit Business IP Desk Phone
Yealink SIP-T87W Gigabit Business IP Desk Phone

For organizations requiring integrated Wi-Fi 6 and Bluetooth connectivity, consider Yealink W-Series business IP phones.

Ideal Applications

Receptionists
Executive Assistants
Administrative Staff
Operators
Managers
Call Centers
Customer Service Teams
Enterprise Offices

Includes