160x320 graphic LCD with 4-level gray scales, 20 additional keys through page switch, 20 physical keys each with a dual-color LED, Applies to Yealink IP Phone SIP-T28P and SIP-T26P, Bridge Line Appearance (BLA), Different icons for each function shown on the LCD, Dual-color LED for status information, Intercom, hold, transfer, voicemail, forward, DND., Programmable for speed dialing, call pickup, Supports Busy Lamp Field (BLF), Supports up to 6 modules daisy-chain
