Loopback Connector Specifications

The following tables provide the wiring diagrams for the loopback test adapter that is supplied with SyncLink adapters. This loopback plug is used with the "External Diagnostics" that are part of the Windows Device Manager options and Linux driver.

RS232/V.35/RS530 Loopback (GT family/PCMCIA color:black)
Signal
Pin Connections
DTR(+),DSR(+),DCD(+)
20,6,8
DTR(-),DSR(-),DCD(-)
23,22,10
RTS(+),CTS(+)
4,5
RTS(-),CTS(-)
19,13
TxD(+),RxD(+)
2,3
TxD(-),RxD(-)
14,16
AuxCLK(+),TxCLK(+),RxCLK(+)
24,15,17
AuxCLK(-),TxCLK(-),RxCLK(-)
11,12,9


Legacy (obsolete) RS-232/V.35 Loopback (color:grey)
Signal
Pin Connections
DTR,DSR,DCD
20,6,8
RTS,CTS
4,5
RTS,CTS
4,5
TxD(+),RxD(+)
2,3
TxD(-),RxD(-)
14,16
AuxCLK(+),TxCLK(+),RxCLK(+)
24,15,17
AuxCLK(-),TxCLK(-),RxCLK(-)
23,13,19