Serial port 126
Models 2603, 2621, and 2635 User Manual D • OnSite Physical Connectors
Serial port

V.35 (M/34 and DB-25 Connector)

The Model 2635 has a DB-25 connector for the V.35 interface. table 9 provides the pinouts for the M/34 and

DB-25 connectors.

Table 9. V.35 pinout for M/34 & DB-25 connectors
M/34
Pin No.
DB-25
Pin No. Signal Name Direction
A 1 Frame/Chassis
Ground
n/a
P 2 TD-a from DTE
R 3 RD-a to DTE
C 4 RTS from DTE
D 5 CTS to DTE
E 6 DSR to DTE
B 7 Signal Ground n/a
F 8 CD to DTE
X 9 RC-b to DTE
10
W11 XTC-b from DTE
AA 12 TC-b to DTE
13
S14 TD-b from DTE
Y15 TC-a to DTE
T16 RD-b to DTE
V17 RC-a to DTE
L18 Local Loopback to DTE
19
H20 DTR from DTE
N21 Remote Loopback to DTE
22
23
U24 XTC-a from DTE
M25 Test Mode to DTE