Siemens Hicom 300 serial cable

[mskop]

I wanted to know what kind of serial cable I should create to connect siemens hicom 300 with a CDR device. Siemens hicom has a 25female serial port.
So I want to know where I should connect the Rx,GND,RTS,DTR, from CDR to siemens hicom.
I found something like that:
Siemens CDR Device
TX 2 ------ 2 RX
GND 7------ 7 GND
CTS 5------ 5 RTS
DSR 6 ----- 6 DTR

is this right?

 

[obtsystems]

This is for the office pro, but should be the same


Pin Assignment of the 9-Pin Socket and 25-pin Connector on the V.24 (RS-232) Cable for OfficePro
9-Pin Sub-D Socket 25-Pin Sub-D Connector Signal
1 8 DCD (Data Carrier Detect)
2 3 RxD (Receive Data)
3 2 TxD (Transmit Data)
4 20 DTR (Data Terminal Ready)
5 7 GND (Signal Ground)
6 6 DSR (Data Set Ready)
7 4 RTS (Request To Send)
8 5 CTS (Clear To Send)
9 22 RI (Ring Indicator)

 

[donb01]

Just FYI if you are not aware, you must connect your cable to the RMX port to receive your CDR data. The protocol for the RMX port is 4800 7E1. I just use a plain old store bought serial cable and it works for me hooking to a terminal or computer. If hooking to a modem type device you probably need a null modem adapter.