Entry Level IP Phone,visual operation, Simple button, rich features, HD voice, exquisite details, innovative appearance" as A21 design concept, is a high-end 6 SIP accounts entry-level voip phone specifically for office staffs. It incorporates full view monochrome graphic lattice screen, dual-port Ethernet, PoE. Its "3W high-power loudspeaker hands-free, 5- party conference, higher level of ZRTP encryption and innovative appearance" are highlight advantages in Entry-level IP Phone
