Lucent Technologies 3100 用户手册
Rack Installation
3-16
Issue 1 October 1998
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.
connector with the signal description and direction of data
flow.
PIN
EIA
DESIG
DESCRIPTION
DIRECTION
1
RLSD
Received Line
Signal Detector
Output
2
RD
Received Data at
DTE
Output
3
SD
Transmitted Data
from DTE
Input
4
DTR
DTE Ready
Input
5
SG
Signal Ground
Common
6
DSR
DCE Ready
Output
7
RTS
Request to Send
Input
8
CTS
Clear to Send
Output
9
RI
No Connection
NA
Table 3-6. RS-232 Cable Pinouts
RS-232
Terminology
Terminology
EIA: Electronics Industry Association
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.
the older 25-pin specification. RS-232 is used in this manual because of the
common use of the term for serial interfaces.