... .Enable to connect with 2 DSS with 128 keys 3.Caller ID Telephone 4.Transfer, Hold, ... and the super powerful function.With 30 Direct Keys, enable to be connected with 2 DSS with ... 64 keys.Console Phone Main Feature1.Adopted STN display ... ) Other function keys and programming keys; “1”—“30” __ programming keys, ,can also be programmed as extension keys and function keys; “31” ...