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Models 2603, 2621, and 2635 User Manual
Serial port
V.35 (M/34 and DB-25 Connector)
The Model 2635 has a DB-25 connector for the V.35 interface.
DB-25 connectors.
Serial port
Table 9. V.35 pinout for M/34 & DB-25 connectors
M/34
DB-25
Signal Name
Pin No.
Pin No.
A
1
Frame/Chassis
P
2
R
3
C
4
D
5
E
6
B
7
Signal Ground
F
8
X
9
10
W
11
AA
12
13
S
14
Y
15
T
16
V
17
L
18
Local Loopback
19
H
20
N
21
Remote Loopback
22
23
U
24
M
25
table 9
provides the pinouts for the M/34 and
Direction
Ground
TD-a
from DTE
RD-a
to DTE
RTS
from DTE
CTS
to DTE
DSR
to DTE
CD
to DTE
RC-b
to DTE
XTC-b
from DTE
TC-b
to DTE
TD-b
from DTE
TC-a
to DTE
RD-b
to DTE
RC-a
to DTE
to DTE
DTR
from DTE
to DTE
XTC-a
from DTE
Test Mode
to DTE
D • OnSite Physical Connectors
n/a
n/a
126
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