
126 FSU 5622 ESP User Manual 61200.175L1-1
Appendix A. Pinouts
Table A-B
Telco Connector Pin Assignments
Pin Name Description
1 R1 Transmit Data from DSU to Network-Ring 1
2 T1 Transmit Data from DSU to Network-Tip 1
3-6 - Not Used
7 T Receive Data from Network to DSU-Tip
8 R Receive Data from Network to DSU-Ring
Table A-C
Control Connector Pin Assignments
RJ Pin# Function Direction
1 GND
2 RTS I
3TD I
4 DSR O
5RDO
6 CTS* O
7 DTR I
8 DCD O
*Used for hardware flow control.
I=Input
O=Output
Table A-D
ESP DBU Card Pin Assignments
Pin Name Description
4-wire Switched 56
1 R1 Transmit Data from DSU to Network-Ring 1
2 T1 Transmit Data from DSU to Network-Tip 1
3-6 - Not Used
7 T Receive Data from Network to DSU-Tip
8 R Receive Data from Network to DSU-Ring
V.34 and 1B+D ISDN
1-3 - Not Used
4 T Network-Tip
5 R Network-Ring
6 - 8 - Not Used
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