Digital Equipment DECserver 700-08, Hardware Owner'S Manual

Page: 42 / 77

4–4 Site Preparation and Maintenance
4.1.3 DECserver 700-08 Serial Line Ports
The DECserver 700-08 uses a 25-pin D-sub connector on the serial line ports. Figure
4-3 shows how the connector pins are numbered and describes the signals on each
pin.
Figure 4–3: Pin Numbers and Signals for 25-Pin D-sub Connector
PIN 1 13
PIN 14 25
Pin Number Signal Description
2
3
4
5
6
7
8
12
20
22
23
LKG-3133-91I
Transmitted data
Received data
Request to send
Ready for sending
Data set ready
Signal ground
Data channel received
line signal detector
Data signal rate
selector (DCE)
Data terminal ready
Ring indicator
Data signal rate
selector (DTE)
TXD
RXD
RTS
CTS
DSR
GND
DCD
SMI
DTR
RI
DSRS
BA
BB
CA
CB
CC
AB
CF
CI
CD
CE
CH
103
104
105
106
107
102
109
112
108/2
125
111
Signal name EIA-232-D V.24