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Data Communications
Multipoint Cabling
NOTE: Before physically connecting a terminal to an operational multipoint daisy-chained
line, be sure to first configure the terminal for multipoint operation. The default
datacomm configuration is point-to-point full duplex hardwired. If you physically
connect a point-to-point terminal to an operational line of multipoint terminals, you
will disrupt the operation of the entire line.
Three cables are available for connecting the first multipoint terminal to the modem or
hardwired line: a first multipoint asynchronous cable, a first multipoint synchronous cable
with receive clock, and a first multipoint synchronous cable without receive clock. One
multipoint daisy chain cable is used for both asynchronous and synchronous use. Figure 7-8
illustrates an HP multipoint configuration.
Configuration
Cable A
Asynchronous Multipoint
13242T
Synchronous Multipoint
132425
(Receive clock from modem)
Synchronous Multipoint
13242R
(Receive clock from terminal)
NOTE:
1. A 13232U Modem Bypass Cable can
be used to bypass the modems.
2.-j> is a male connector.
3.
>
is a female connector.
Figure 7-8. HP Multipoint Configuration
7-20
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