1-4
PA-8T-232 Synchronous Serial Port Adapter Installation and Configuration
OL-3562-03
Chapter 1 Overview
Cables and Pinouts
Cables and Pinouts
The compact serial cable for the PA-8T-232 is available in DTE or DCE mode with a 200-pin, D-shell
plug at the router end and eight, 25-pin Winchester block-type receptacles or plugs at the network end.
(See
.) The compact serial cable for the PA-8T-232 is 6 feet (1.8 meters) long.
Figure 1-3
EIA/TIA-232 Compact Serial Cable
Note
The EIA/TIA-232 compact serial cable attached to the single PA-8T-232 port determines the mode (DTE
or DCE) of the eight EIA/TIA-232 interfaces.
Following are the product numbers, according to mode, for the EIA/TIA-232 compact serial cable:
•
DTE mode with a 25-pin Winchester-type EIA/TIA-232 plug (CAB-OCT-232-MT[=])
•
DCE mode with a 25-pin Winchester-type EIA/TIA-232 receptacle (CAB-OCT-232-FC[=])
Note
Do not use the Cisco Systems-provided EIA/TIA-232 adapter cable CAB-OCT-232-MT= to connect a
PA-8T-232 interface that is configured for DTE mode directly to an NEC - NEXTSTAR 1E model
C4969 MD/SAC unit interface that is configured for DCE mode. Doing so prevents transmit and receive
data signals from being properly exchanged between the two interfaces.
Instead, you must connect an additional, intermediate adapter cable—with standard EIA/TIA-232
DB-25 connectors at both ends—from the network end of CAB-OCT-232-MT= to the standard
EIA/TIA-232 DB-25 connector (the DCE interface) on the NEC - NEXTSTAR 1E model C4969
MD/SAC unit. Cisco Systems does not provide this additional cable; however, its signals and
pin assignments are listed in
Note
You can use the Cisco Systems-provided EIA/TIA-232 adapter cable CAB-OCT-232-FC= to connect a
PA-8T-232 interface that is configured for DCE mode directly to an NEC - NEXTSTAR 1E model
C4969 MD/SAC unit interface that is configured for DTE mode.
Because the PA-8T-232 uses a special, high-density port that requires a special compact serial interface
cable, we recommend that you obtain the cables from the factory.
EIA/TIA-232 connectors
H7381
Pin 60
Pin 161
Pin 200
Pin 1
Molex LFH 200-pin connector
