The Yealink SIP-T48U device is an advanced VoIP IP phone from the SIP T4 U series, designed for managers and professionals who require advanced call features. It features a 7-inch color touchscreen with backlight and 800 x 480 resolution, support for up to 16 SIP accounts, dual Gigabit Ethernet ports, and Power over Ethernet (PoE) support.

Main features:

• Support for up to 32 simultaneous calls
• 16 line keys
• 29 programmable one-touch keys
• Two USB 2.0 ports for USB recording and optional Bluetooth or Wi-Fi dongles
• Headset support with RJ-9 and EHS
• Advanced call management features such as hot-desking, voicemail, and centralized call recording
• Enhanced sound quality with Optima HD Voice, Acoustic Shield, and Smart Noise Filtering
• Support for expansion modules with color display
• Dual firmware images for redundancy
• Zero Touch Provisioning

The device features a classic gray finish with a two-angle stand and wall mount support, designed for demanding professional environments.