Telecommunication

Calling Line Identification Receiver; Caller ID Adjunct Boxes, Bell 202 Fsk/V.23,Power Down,3.5V - 5..

Iso2-Cmos Integrated Dtmf Receiver; Low Power Consumption, Central Office Quality, Remote Control,4-..

Iso2-Cmos Integrated Dtmf Transceiver; Complete Dtmf Transmitter/Receiver , Vos: 25mV, Adjustable gu..

Integrated Dtmf Transceiver With Intel Micro Interface,Dtmf Transmitter/Receiver, Low Power Consumpt..

DTMF TRANSCEIVER ..

Caller-ID on Call Waiting (CIDCW) receiver ..

www.bg-electronics.de/datenblaetter/Schaltkreise/PSB4500.pdf ..