CTC Union ETU-01A - Appendix A. I;F Modules; E1 Line Connectors; Connector; BNC Connector

Appendix A. I/F Modules
73
May 2011
Appendix A. I/F Modules
A.1 E1 Line Connectors
A.1.1 DB-15 connector
The E1 link DB-15 connector conforms to AT&T Pub 62411. The physical interface is a 15-pin
female D-Sub type connector. The alarm relay contacts also share the same connector. If you need
to use these contacts, construct a custom "Y" cable.
Pin Designation Direction Function
1 TTIP From ETU-01A Transmit data
2 FG
↔
Frame ground
3 RTIP To ETU-01A Receive data
4 FG
↔
Frame ground
5 -- -- --
6 -- -- --
7
Alarm relay
common
-- Alarm Relay
8
Alarm relay
normally open
-- Alarm Relay
9 TRING From ETU-01A Transmit data
10 -- -- --
11 RRING To ETU-01A Receive data
12 -- -- --
13 -- -- --
14 -- -- --
15
Alarm Relay
normally closed
-- Alarm Relay
Table A-1 E1 DB-15 connector pin allocation
A.1.2 BNC connector
Conn. Pin Designation Direction Function
Center TTIP
From
ETU01A
Transmit data TX
Sleeve TRING
↔
Signal return
Center RTIP To ETU-01A Receive data
RX
Sleeve RRING
↔
Signal return
Table A-2 E1 BNC connector pin allocation