User guide

IOLAN+, IOLAN+ Rack & IOLAN+ 102/104 User guide
Standard modem cables
Page 210
IOLAN+ Rack and IOLAN+ 102/104 RS232 RJ45 DTE to Modem DB25 DCE
Typical uses This type of cable is used to connect to DCE devices such as Modems. Perle provides a
RJ45-DB25 converter for IOLAN to Modem DB25 Male convertor accessory. It allows a
standard CAT5 patch cable to be connected to the IOLAN and the DB25 Male connector to a
DCE device such as a modem with the appropriate pin-outs. See Perle’s website
www.Perle.com for ordering information.
Cable diagram
Connector pinout table
Pin 1
(looking into
connector)
Pin 1
(looking into
connector)
Male
Male
RJ45 (IOLAN+) DB25(MODEM)
Pin Signal Direction Description Pin Signal Description
1 DCD In Data Carrier Detect 8 DCD Data Carrier Detect
2 RTS Out Request To Send 4 RTS Request To Send
3 DSR In Data Set Ready 6 DSR Data Set Ready
4 TXD Out Transmit Data 2 TXD Transmit Data
5 RXD In Receive Data 3 RXD Receive Data
6 S/GND Signal ground 7 S/GND Signal ground
7 CTS In Clear To Send 5 CTS Clear To Send
8 DTR Out Data Terminal Ready 20 DTR Data Terminal Ready