Specifications

Table Of Contents
106 Chapter 9 Pinout reference
RJ-45 (Altpin on) to DB-25M modem cable
The table shows the wiring diagram for an EIA-232 RJ-45 8-pin connector,
with Altpin on, to a DB-25 modem cable.
From
RJ-45
Signal Direction Signal To DB-25
1 DCD DCD 8
5 RxD
RxD 3
4 TxD
TxD 2
8 DTR
DTR 20
6SG
SG 7
2 RTS
RTS 4
7 CTS
CTS 5
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).