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7-53
D-620003-0-20 Rev J
CONFIDENTIAL
Alarm Monitoring Connectivity Options
7.8.3
RS-232 Port Expander Connection
In this configuration a port expander is used to allow the connection of multiple
devices to a single PC serial port. Testing was performed with an Equinox SST-16P
Multiport Board. A DB-25 male to DB-9 female modem cable must be made to con-
nect the connector panel to the Main Hub (refer to Appendix A.6 on page A-5). Or,
you can use a DB-25 male/DB-9 male adapter with a DB-9 female to DB-9 female
null modem cable.
Figure 7-21
OA&M Connection using an RS-232 Port Expander
NOTE:
Refer to Appendix A.6 on page A-5 for the modem cable wiring informa-
tion.
RS-232 Port Expander
Host Cable
Serial Expansion Card to Connector Panel
Connector Panel
DB-25 male to DB-9 female
Modem Cable
PC running
or OpsConsole
Software
AdminManager
