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Issue 6
LED
LIVE
LED 1
LED 2
LED 3
LED 4
5 - 38
4.7.2
4.7.3
Table 5-17 DID(4)-U( ) ETU LED Indications
Description
ETU status
Operation stopped
Line 1 status
Line 2 status
Line 3 status
Line 4 status
4.7.4
4.7.5
Installation
A maximum of four DID(4)-U( ) ETUs can be installed in
the system in slots S3~S6.
LED Indications
On
Normal Operation
(Power On)
Busy
Busy
Busy
Busy
Connectors
The DID(4)-U( ) ETU has one connector:
CN1
Connects to the backboard
Connections
Demark
MDF
T 1
T
R 1
R
T 2
T
R 2
R
T 3
T
R 3
R
T 4
T
R 4
R
Figure 5-24 DID(4)-U( ) ETU Connections
Flashing
No Power
Not Used
Not Used
Not Used
Not Used
CO
Installing Electronic Telephone Units
Electra Elite
Off
Idle
Idle
Idle
Idle
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