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1 Connect the RJ-45 end of the cable to the asynchronous port on the
Synchronous Card
I/O card, then attach the DB-25 end of the cable to the modem as
shown in Figure C-6.
Figure C-6 Connecting a Cable to an Asynchronous I/O Card
3Com makes four types of cables to accommodate your network
requirements. Each cable has a DB-50 connector that plugs into the
synchronous I/O card, and a synchronous connector at the other end
for connection to the network.
The four cable types are shown in Table C-1.
Table C-1 Types of Synchronous Cables
Cable Type
Description
V.35 cable
The network connector is a male 34-pin V.35 block
connector for access to modem or data service unit
(CSU/DSU) interfaces.
RS-449 cable
The network connector is a male 37-pin RS-449 connector
for access to modem or data service unit (CSU/DSU)
interfaces.
RS-232 cable
The network connector is a male 25-pin RS-232 connector
for access to modem or data service unit (CSU/DSU)
interfaces.
Attaching I/O Cables
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