Device Type: Business IP Phone (SIP) Model: Yealink SIP-T77U Display: 7-inch 800x480 pixel color touch screen with backlight SIP Accounts: Up to 16 Audio: Yealink Optima HD Voice, AI Noise Cancellation, Acoustic Shield, 3W speaker, Hearing Aid Compatible (HAC) handset Network Ports: Dual-port Gigabit Ethernet USB Ports: Dual USB (USB-A and USB-C), supports using any two of Bluetooth, Wi-Fi, USB headset, and USB recording simultaneously PoE Support: Yes Programmable Keys: Up to 84 DSS keys (one-touch) Expansion Module: Supports up to 3 color-screen expansion modules (EXP55), providing up to 234 additional keys Security: TEE hardware encryption, TLS/SSL, SRTP, 802.1x, dual firmware images Operating System: Linux 6.1 Handset: Hall switch technology Mounting: Stand with 2 adjustable angles, wall-mountable Compatibility: 3CX, Broadsoft Broadworks, NFON Provisioning: Yealink RPS, Zero Touch Provisioning
