3Com ACCESSBUILDER 4000 Installation Manual page 78

C-8 A C: I
PPENDIX NSTALLING
Cable Type
V.35 cable
RS-449 cable
RS-232 cable
X.21 cable
I/O C
ARDS
Table C-1 Types of Synchronous Cables
Description
The network connector is a male 34-pin V.35 block connector for
access to modem or data service unit (CSU/DSU) interfaces.
The network connector is a male 37-pin RS-449 connector for
access to modem or data service unit (CSU/DSU) interfaces.
The network connector is a male 25-pin RS-232 connector for
access to modem or data service unit (CSU/DSU) interfaces.
The network connector is a male 15-pin X.21 connector for access
to modem or data service unit (CSU/DSU) interfaces.
If you have mistakenly received the wrong synchronous cable with your I/O
card, contact your supplier for a replacement.
To cable a synchronous card:
1 Connect the DB-50 end of the cable to the synchronous port on the I/O
card, then attach the other end to the CSU/DSU or modem connector, as
shown in Figure C-7.
Figure C-7 Connecting a Cable to a Synchronous I/O Card
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