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3-6 Chapter 3
Optional Cable Drawings
Loopback Plug Options
A loopback connector must be used when running external loopback tests on
the DCP286
i/386i/486e Platform Diagnostics.
R-S232/EIA-530 Loopback Plug (DB25F)
Loopback plug signals for the female 25-pin connector. This loopback plug
will work for RS232, RS422/EIA530, RS423, and RS485 adapter cables.
2
14
3
16
15
12
17
9
4
5
19
13
20
6
8
23
22
10
TDA
TDB
RDA
RDB
TCA
TCB
RCA
RCB
RTSA
CTSA
RTSB
CTSB
DTRA
DSRA
CDA
DTRB
DSRB
CDB
Figure 3-1 (Not Supplied by Emulex)