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Installation Manual
Quidway R2600/3600 Series Modular Routers
Chapter 8
Function Modules
8-17
Enlarged A side
Pos.1
Pos.50
A
P2
P1
B
DB50 Male
DB25 Male
Enlarged B side
Pos.25
Pos.1
Label
Figure 8-21
EIA-232 (V.24) DTE cable
Table 8-12
EIA/TIA-232 DTE cable pinouts (DB-50
↔
DB-25)
DB-50
Signal
Description
Direction
DB-25
Signal
5
TxD/RxD
Twisted pair no. 5
→
2
TxD
27
RxD/TxD
Twisted pair no. 9
←
3
RxD
2
RTS/CTS
Twisted pair no. 4
→
4
RTS
31
CTS/RTS
Twisted pair no. 10
←
5
CTS
6
DSR/DTR
Twisted pair no. 11
←
6
DSR
30
DCD/LL
Twisted pair no. 12
←
8
DCD
3
TxC/NIL
Twisted pair no. 8
←
15
TxC
28
RxC/TxCE
Twisted pair no. 7
←
17
RxC
1
LL/DCD
Twisted pair no. 2
→
18
LTST
26
DTR/DSR
Twisted pair no. 3
→
20
DTR
4
TxCE/TxC
Twisted pair no. 6
→
24
TxCE
50
GND
Single
-
1
Shield_GND
7
GND
Twisted pair no. 1
-
7
Circuit_GND
23
MODE-DCE
Shorting group
GND
-
-
21
MODE-0
Shorting group
GND
-
-
Note:
The pins not referenced in the above table are not connected.
z
EIA/TIA-232
DCE