Yealink Yealink Executive IP Phone With POE 6 Lines It supports up to 6 SIP accounts, each with a standalone configuration. HD Voice Quality It supports advanced wideband voice codec G.722 and full-duplex hands-free speakerphone with enhanced AEC, delivering superior voice clarity. Executive Level Phone Equiped with 16 programmable function keys with LED, 4 soft keys, and supported BLF, XML Phonebook features, which increase working efficiency.