Fanvil X7C High-End Enterprise IP Phone 20 SIP Lines with Dual Gigabit Ports and Integrated PoE and WiFi Connectivity. The telephone's 5' large color display offers convenient access to all key information such as call lists, phonebook, functions. Newly-added support for Opus and a larger audio cavity bring abundant, strong low-frequency audio effects. The speakerphone adopts full net coverage delivering crystal clear, life-like voice communication. 12 DSS keys on side of the display feature multi-colored LEDs, ensuring they are easy to see. Up to 60 DSS key entries are available over 5 pages, and each key can be individually configured with speed dial, call forwarding, BLF, group broadcasting function etc.