Lucent Technologies 3000, 3100 manual RS-232 Cable Pinouts, Terminology

Rack Installation

RS-232 DB-9 Connector Pinouts

Introduction Table 3-6, shown below, lists each pin within the RS-232 connector with the signal description and direction of data flow.

PIN

1

2

3

4

5

6

7

8

9

EIA

DESIG

RLSD

RD

SD

DTR

SG

DSR

RTS

CTS

RI

DESCRIPTION

Received Line Signal Detector

Received Data at

DTE

Transmitted Data

from DTE

DTE Ready

Signal Ground

DCE Ready

Request to Send

Clear to Send

No Connection

DIRECTION

Output

Output

Input

Input

Common

Output

Input

Output

NA

Table 3-6. RS-232 Cable Pinouts

RS-232	EIA: Electronics Industry Association
Terminology
	DTE: Data Terminal Equipment
	DCE: Data Communications Equipment.

Note: The interface is specified by EIA/TIA 574. The term RS-232 refers to the older 25-pin specification. RS-232 is used in this manual because of the common use of the term for serial interfaces.

3-16Issue 1 October 1998