D-840 Caller ID with Dial Back
D-840
．3-Line large LCD display ．99 Incoming call memories ．DTMF or FSK or both auto detect ．ETSI and BELLCODE standard
D-840
．3-Line large LCD display ．99 Incoming call memories ．DTMF or FSK or both auto detect ．ETSI and BELLCODE standard 1699003