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Connector Pin Assignments
Serial Interface Pin Assignments for DTE Mode (Packet Use Only)
Function
Frame Ground
Transmit Data
Receive Data
Request to Send
Clear to Send
Data Set Ready
Signal Ground
Data Carrier Detect
Balanced Receiver Clock
Balanced Data Carrier Detect
Balanced External Transmitter
Clock
Balanced Transmitter Clock
Balanced Clear to Send
Balanced Transmit Data
Transmitter Clock
Balanced Receive Data
Receiver Clock
Local Loopback
Balanced Request to Send
Data Terminal Ready
(not used)
Balanced Data Set Ready
Balanced Data Terminal Ready
External Transmitter Clock
(Not Used)
*This refers to the DB-25 Serial interface connector on the back of the unit.
The Serial Interface is a standard DB-25 jack.
Abbrev.
Direction
FG
n/a
TD
Output
RD
Input
RTS
Output
CTS
Input
DSR
Input
SG
n/a
DCD
Input
(B)RC
Input
(B)DCD
Input
(B)ETC
(B)TC
Input
(B)CTS
Input
(B)TD
Output
TC
Input
(B)RD
Input
RC
Input
Loop 3
Output
(B)RTS
Output
DTR
Output
n/a
(B)DSR
Input
(B)DTR
Output
ETC
n/a
DB-25*
RS-232
1
1
3
2
2
3
5
4
4
5
20
6
7
7
8
8
12
10
11
19
16
24
15
14
15
17
18
18
13
6
20
21
21
23
22
25
25
Pin #
V.35
EIA-530
X.21
A
1
P
2
R
3
C
4
D
5
E
6
B
7
F
8
X
9
10
AA
12
13
S
14
Y
15
T
16
V
17
J
18
19
H
20
21
22
23
25
S p e c i f i c a t i o n s
1
4
2
--
3
--
8
5
--
12
13
--
10
11
--
9
--
--
--
--
--
--
--
6
A-7
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