Issue 6
Electra Elite
5 - 28
Installing Electronic Telephone Units
4.4.4
LED Indications
4.4.5
Connectors
The COIB(4)-U20 ETU has the following connectors:
CN1
Connects to the backboard
CN2
Future
CN3 Future
4.4.6
Connections
Table 5-13 COIB(4)-U20 ETU LED Indications
LED
Description
On
Flashing Off
LIVE
ETU status
Operation stopped
(Power On)
Normal Operation
No Power
LED 1
Channel 1 status
Busy
Not Used
Idle
LED 2
Channel 2 status
Busy
Not Used
Idle
LED 3
Channel 3 status
Busy
Not Used
Idle
LED 4
Channel 4 status
Busy
Not Used
Idle
FAX
FAX status
Busy
Not Used
Idle
Figure 5-18 COIB(4)-U20 ETU Connections
CO
MDF
T 1
R 1
T 2
R 2
T 3
R 3
T 4
R 4
T 8
R 8
T
R
T
R
T
R
T
R
T
R
Demark
Fax
Branch
Summary of Contents for ElectraElite 48
Page 2: ...SYSTEM HARDWARE MANUAL Stock Number 750376 Issue 6 Series 8000 48 ...
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Page 10: ...Regulatory Information ...
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Page 56: ...1st Tab Chapter 1 Introduction ...
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Page 78: ...2nd Tab Chapter 2 System Specifications ...
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Page 102: ...3rd Tab Chapter 3 Hardware Requirements ...
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Page 110: ...4th Tab Chapter 4 Installing the KSU ...
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Page 136: ...5th Tab Chapter 5 Installing Electronic Telephone Units ...
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Page 256: ...6th Tab Chapter 6 Installing Electra Elite Multiline Terminals ...
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Page 290: ...7th Tab Chapter 7 Installing Optional Equipment ...
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Page 344: ...8th Tab Chapter 8 Installing Dterm Series i Equipment ...
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Page 358: ...Electra Elite Issue 6 System Hardware Manual 8 13 Figure 8 15 Removing the Line Panel ...
Page 396: ...9th Tab Chapter 9 Installing Electra Professional Equipment ...
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Page 404: ...10th Tab Chapter 10 System Maintenance ...
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Page 434: ...SYSTEM HARDWARE MANUAL NEC America Inc Issue 6 Series 8000 48 ...
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