13/4/99 16:40 General D-1
Appendix DDTE Interface Connectors

D.1. General

Table D-1 provides detailed information about each DTE interface

connector.

Table D-1 Interface Signal List (Female Connectors) Pins and Standard Signal Names

RS-232 V.35 EIA-530 X.21
Signal
Function
DB-25
Stand-
alone
and
Frame
DB-25
Frame
34-pin
Standalone
Pin Circuit
DB-25
Standalone
and Frame
Pin Circuit
DB-25
Frame
DB-15
Standalone
Pin Circuit/
(Function)
Description
Protective
Ground
1 1 A Frame 101 1 1 1 -
[SHIELD]
Chassis ground.
May be
isolated from
Signal Ground.
See Table 2-1.
Signal Ground 7 7 B Signal 102
Ground
7AB 7 8 -
[GND]
Common
Signal and DC
power supply
ground.
Transmitted
Data
211
9
S TD(B) 103
P TD(A) 103
2 BA(A)
14 BA(B)
2
14
2 T(A)
9 T(B)
[TRANSMIT]
Serial digital
data from DTE.
The data
transitions must
occur on the
rising edge of
the transmit
clock.
Received
Data
312
13
R RD(A) 104
T RD(B) 104
3 BB(A)
16 BB(B)
3
16
4 R(A)
11 R(B)
[RECEIVE]
Serial digital
data at the
output of the
modem
receiver. The
data transitions
occur on the
rising edge of
the receive
clock.