User Manual
8-20
DB25 Pin No.
Signal Function
corresponding
1
Protective Ground
A
7 Signal
Ground B
2 Transmitted
data
A P
14
Transmitted data B
S
3 Received
data
A R
16 Received
data
B T
4
Request to send
C
5
Clear to send
D
6 DCE
ready E
20 DTE
ready H
8
Data carrier wave tested
F
24
Transmit clock A(from DTE)
U
10
Transmit clock B(from DTE)
W
15
Transmit clock A(from DCE)
Y
12
Transmit clock B(from DCE)
AA
17
Receive clock A(from DCE)
V
9
Receive clock B(from DCE)
X
Table4. V.35 Interface Signal Assignments
Connect FE1/V.35 Interface Converter with DTE device by the equipped
DB25M/M34F cable.
NOTE:
Connect with DCE device by intercross cable, facture of intercross cable
defined as below, note that some DCE device pin assignment are different:
A
B
DB25 Pin
Definition
DB25 Pin
Definition
1
Protective Ground
1
Protective Ground
7
Signal Ground
7
Signal Ground
2
Transmitted data A
3
Received data A
14
Transmitted data B
16
Received data B
3
Received data A
2
Transmitted data A
16
Received data B
14
Transmitted data B
4
Request to send
8
Data carrier wave tested
5
Clear to send
8
Data carrier wave tested
6
DCE ready
20
DTE ready
20
DTE ready
6
DCE ready
8
Data carrier wave tested
4
Clear to send
24
Transmit clock A(from DTE)
17
Receive clock A(from DCE)
11
Transmit clock B(from DTE)
9
Receive clock B(from DCE)
15
Transmit clock A(from DCE)
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