41
Echo 2 Mbps Multiplexer
TECHNICAL: 0118 931 2233
Appendix H - X.21/V.11 Data Channel Pinout
X.21/V.11 Data Channels connectors 1 - 4
(15 Way DB25 Type Configured DCE)
DATA CHANNEL CONNECTIONS:
Name Description
Type at
Connector
DCE - DB15
Female
Protective Ground
-
1
G
Signal Ground
-
8
T(A) TxD
a
Input
2
T(B) TxD
b
Input
9
R(A) RxD
a
Output
4
R(B) RxD
b
Output
11
S(A) Clock
a
Output
6
S(B) Clock
b
Output
13
I(A) Indicate
a
Output
5
I(B) Indicate
b
Output
12
C(A) Control
a
Input 3
C(B) Control
b
Input 10
X(A) Ext
Clock
a
Input 7
X(B) Ext
Clock
b
Input 14
Note:
Connector shell and termination must be as specified in EMC section, Appendix C, on page 34 of this
manual.
