Comtech EF Data SMS-758 - Manual (Page 77)

SMS-758 Modem Protection Switch Theory of Operation
MN/SMS758 Rev. 3 4–17
4.6.2.2 Connector Pinouts
The V.35 interface is an industry standard 34-pin block connector.
Screw locks provide mechanical security for the mating connector.
Signal Function Name Pin #
Signal Ground SG A,B
Transmit Data SD-A P
SD-B S
Serial Clock Transmit SCT-A Y
SCT-B a (AA)
Receive Data RD-A R
RD-B T
Request To Send RTS C
Serial Clock Receive SCR-A V
SCR-B X
Clear To Send CTS D
Data Set Ready DSR E
Rcv. Line Signal Det. RLSD F
Serial Clock Transmit Ext SCTE-A U
SCTE-B W
Master Clock MC-A c (CC)
MC-B d (DD)
Modulator Fault MF m (MM)
Demodulator Fault DF n (NN)
Note: MF and DF inputs are only on the prime and backup modem interface connectors,
not the terrestrial data connector.