Db-25 and db-9 signal summary – Nortel Networks CTA 500dm User Manual

Page 84

84 Appendix

CTA 500

dm On Line Guide

P0873832 Issue 05

DB-25 and DB-9 signal summary

The following tables show which DB-25 and DB-9 pins are used by
the CTA 500dm and what the signals are used for by the
CTA 500dm.

DB-25 connection

DB-25

pin

RS-232

function

CTA 500

function

Shield

Transmitted Data

Received Data

Request to Send/Ready for Receiving

RTS

Clear to Send

CTS

DCE Ready

DSR

Signal Common

GND

Received Line Signal Detector

DCD

Secondary Received Line Signal/Detector/

Data Signal Rate Selector (DCE Source)

–

Secondary Clear to Send

–

Secondary Transmitted Data

–

Secondary Received Data

–

Local Loopback

–

Secondary Request to Send

–

DTE Ready

DTR

Ring Indicator

Data Signal Rate Selector (DCE/DTE Source)

–

Transmitter Signal Element Timing (DTE Source)

Test Mode