DB-25F to RJ-45 3 COM Total Control/COMPAQ Microcom Modem Cable
Modem Cables
EIA-232 Modem Cables, DB-25 to RJ-45
The wiring diagram for a DB-25 pin to 3COM Total Control/COMPAQ Microcom RJ-45 8-pin modem cable is
shown in Table 1.
Table 1: EIA-232 DB-25 to RJ-45
From
DB-
25
Signal Direction Signal To RJ-45
8 DCD DCD 2
3 RxD
RxD 5
2 TxD
TxD 6
20 DTR
DTR 3
7SG
SG 4
6 DSR
DSR N/A
4 RTS
RTS 8
5 CTS
CTS 7
22 RI
RI 1
Shell GND
GND N/A
● Arrows indicate which direction the signal is flowing
NOTES:
● Altpin should be turned off when using this cable.
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