
Installation Manual
Quidway R2600/3600 Series Modular Routers
Chapter 8
Function Modules
8-21
Table 8-15
V.35 DCE cable pinouts (DB-50
↔
34PIN)
DB-50
Signal
Description
Direction
34 PIN
Signal
31
CTS/RTS
Twisted pair no. 8
→
C
RTS
2
RTS/CTS
Twisted pair no. 9
→
D
CTS
26
DTR/DSR
Twisted pair no. 10
→
E
DSR
1
LL/DCD
Twisted pair no. 11
→
F
RLSD
6
DSR/DTR
Twisted pair no. 7
←
H
DTR
30
DCD/LL
Twisted pair no. 6
←
K
LT
20
RxD/TxD+
←
P
SD+
44
RxD/TxD-
Twisted pair no. 5
←
S
SD-
15
TxD/RxD+
→
R
RD+
39
TxD/RxD-
Twisted pair no. 1
→
T
RD-
19
RxC/TxCE+
←
U
SCTE+
43
RxC/TxCE-
Twisted pair no. 4
←
W
SCTE-
17
NIL/RxC+
→
V
SCR+
41
NIL/RxC-
Twisted pair no. 3
→
X
SCR-
16
TxCE/TxC+
→
Y
SCT+
40
TxCE/TxC-
Twisted pair no. 2
→
AA
SCT-
50
GND
Single
-
A
Shield_GND
7
GND
Twisted pair no. 12
-
B
Circuit_GND
21
MODE-0
Shorting group
GND
-
-
46
MODE-1
Shorting group
GND
-
-
24
RxD-REST
Shorting group
GND
-
-
49
RxC-REST
Shorting group
GND
-
-
25
TxC-REST
Shorting group
GND
-
-
Note:
The pins not referenced in the above table are not connected.
II.Interaface cable for 4SA module
The 4SA interface is a 100-pin socket.