
RJ-45 (Altpin On) to DB-9M Modem Cable
Modem Cables
EIA-232 Modem Cables Altpin RJ-45 8-pin to DB-9
The wiring diagram for an altpin RJ-45 8-pin to DB-9 modem cable is shown in Table 1.
Table 1: EIA-232 altpin RJ-45 8-pin to DB-9 modem cable
From
RJ-45
Signal Direction Signal To DB-9
1 DCD DCD 1
5 RxD
RxD 2
4 TxD
TxD 3
8 DTR
DTR 4
6SG
SG 5
2 RTS
RTS 7
7 CTS
CTS 8
3 GND
GND Shell
* Arrows indicate which direction the signal is flowing
NOTES:
● Altpin should be turned on when using this cable.
● This cable utilizes the CTS signal of the modem for hardware flow control (RTS/CTS).
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