product description avaya one x deskphone value edition 1608 i voip phone product type voip phone packaged quantity 4 specifications are for single item main features integrated ethernet switch voip protocols h323 voice codecs g711 g729ab g726 speakerphone yes digital duplex call services voice mail caller id call forwarding call transfer call hold display lcd display monochrome yes network ports qty 2 x ethernet 10base t 100base tx compatible