Connector pin assignments, Serial interface pin assignments (dce mode) – Verilink WANsuite 5650 (34-00314.E) Product Manual User Manual
Page 67
A-7
Connector Pin Assignments
Serial Interface Pin Assignments (DCE Mode)
The table below displays Serial Interface Pin Assignments for the DCE Mode.
Function
Abbrev. Direction
DB-25*
V.35
V.36
X.21
Frame Ground
FG
n/a
1
A
20
1
Transmit Data
TD
Input
2
P
4
2
Receive Data
RD
Output
3
R
6
4
Request to Send
RTS
Input
4
C
7
3
Clear to Send
CTS
Output
5
D
9
Data Set Ready
DSR
Output
6
E
11
Signal Ground
SG
n/a
7
B
19
8
Data Carrier Detect
DCD
Output
8
F
13
5
Secondary Receiver Clock
(S)RC
Output
9
X
26
13
Secondary Data Carrier Detect
(S)DCD
Output
10
31
12
Secondary External Transmitter Clock
(S)ETC
Input
11
W
35
7
Secondary Transmitter Clock
(S)TC
Output
12
AA
23
Secondary Clear to Send
(S)CTS
Output
13
27
Secondary Transmit Data
(S)TD
Input
14
S
22
9
Transmitter Clock
TC
Output
15
Y
5
Secondary Receive Data
(S)RD
Output
16
T
24
11
Receiver Clock
RC
Output
17
V
8
6
Local Loopback
Loop 3
Input
18
L
10
Secondary Request to Send
(S)RTS
Input
19
25
10
Data Terminal Ready
DTR
Input
20
H
12
Remote Loopback
Loop 2
Input
21
N
14
Secondary Data Set Ready
(S)DSR
Output
22
29
Secondary Data Terminal Ready
(S)DTR
Input
23
30
External Transmitter Clock
ETC
Input
24
U
17
14
Test Indicator
Output
25
NN
18
Function
Abbrev.
Direction
DB-25*
V.35
V.36
X.21