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SCP-PCS718-010-06H
Network Interface
The COT shelf supports RS-232 X.25 interfaces through a backplane-mounted DB25 connector. The rear
backplane DB-25 is a female connector wired as a Data Terminal Equipment (DTE) interface. The signals and pin
assignments for this connector are listed in
such as a modem.
Figure 4
connector. To connect to a DTE device from the backplane connector, a null modem cable is required.
shows the wiring for the required null modem cable to a DB-9 and DB-25 connector. This feature requires a PMU
installed in the COT shelf. Refer to the PMU documentation for additional information on this interface.
PCS-718 List 1
Table
14. This connector is for communication with a DCE device
shows the cable connections between the backplane connector and a DCE DB-25
Figure 4. Modem Connection for FCS-717 Backplane
Table 14. FCS-717 Backplane DB-25 Connector Pinouts
DB-25
Signal
Pin
2
Transmitted Data
3
Received Data
8
Carrier Detect
7
Signal Common
20
Data Terminal Ready
January 6, 2003
Backplane Connections
Figure 5
17
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