Specifications

Table Of Contents
Chapter 9 Pinout reference 69
Digi One, PortServer TS, and Multi-Port Serial Cards RJ-45 to DB-9M modem adapter
From
RJ-45
Signal Direction Signal To
DB-9
DCD 1 1 DCD
DSR 6
2 RTS RTS 7
3 Ground Ground Shell
4 TxD TxD 3
5 RxD RxD 2
6 SG SG 5
7 CTS CTS 8
8 DTR DTR 4
Pin 1 Pin 1
Female RJ-45 Male DB-9
8-pin
Cable Adapter not to scale
* Arrows indicate which direction the signal is flowing
Notes:
All RJ45 cable adapters are 8-pin.
When using this adapter with a modem or other applications that require DCD on pin 1, you must turn on altpin.
If altpin is turned off, the hardware signal on pin 1 becomes DSR instead of DCD.
This cable utilizes the CTS signal of the modem for hardware flow control (RTS/CTS).