Hardware manual

Issue 8 Electra Elite
5 - 34 Installing Electronic Telephone Units
4.4.5 Connectors
The COIB(4)-U( ) ETU has the following connectors:
CN1 Connects to the backboard
CN2 Future
CN3 Future
4.4.6 Connections
Figure 5-19 COIB(4)-U10 Connections
COIB(4)-U( ) ETU
CO
MDF
T 1
R 1
T 2
R 2
T 3
R 3
T 4
R 4
T
R
T
R
T
R
T
R
Demark