Specifications

C-10
Cisco 7100 Series VPN Router Installation and Configuration Guide
78-6341-03
Appendix C Cable Specifications
Cisco 7120-4T1 and Cisco 7140-8T Cables and Pinouts
EIA/TIA-449 Connections
The router end of all EIA/TIA-449 adapter cables is a high-density 60-pin plug. The network end of the
adapter cable provides a standard 37-pin D-shell connector, which is commonly used for EIA/TIA-449
connections. Figure C-6 shows the connectors at the network end of the adapter cable. EIA/TIA-449
cables are available as either DTE (DB-37 plug) or DCE (DB-37 receptacle). See Table C-10 and
Table C-11 for pinouts.
Figure C-6 EIA/TIA-449 Adapter Cable Connectors
RxC/TxCE 38 <— 24 TxCE
Mode 0
Ground
50
51
–– Shorting group
1. HD = high-density.
Table C-9 EIA/TIA-232 Adapter Cable Signals (DCE) (continued)
DCE Cable (CAB-232FC=)
Table C-10 EIA/TIA-449 Adapter Cable Signals (DTE)
DTE Cable (CAB-449MT=)
Router End, HD
1
60-Position Plug
Network End,
DB-37 Plug
Signal Pin Pin Signal
Shield ground 46 – 1 Shield ground
TxD/RxD+ 11 —>4 SD+
TxD/RxD– 12 —>22 SD–
TxC/RxC+ 24 <— 5ST+
TxC/RxC– 23 <— 23 ST–
RxD/TxD+ 28 <— 6RD+
RxD/TxD– 27 <— 24 RD–
RTS/CTS+ 9 —>7 RS+
RTS/CTS– 10 —>25 RS–
RxC/TxCE+ 26 <— 8RT+
RxC/TxCE– 25 <— 26 RT–
CTS/RTS+ 1 <— 9CS+
CTS/RTS– 2<— 27 CS–
H1344a
DTE
DCE