Led Indications; Connectors; Connections; Figure 5-18 Coib(4)-U20 Etu Connections - NEC ElectraElite 48 System Hardware Manual

Issue 6
LED
LIVE
LED 1
LED 2
LED 3
LED 4
FAX
5 - 28
4.4.4

Table 5-13 COIB(4)-U20 ETU LED Indications

Description
ETU status Operation stopped
Channel 1 status
Channel 2 status
Channel 3 status
Channel 4 status
FAX status
4.4.5
4.4.6

LED Indications

On
Normal Operation
(Power On)
Busy
Busy
Busy
Busy
Busy

Connectors

The COIB(4)-U20 ETU has the following connectors:
CN1 Connects to the backboard
CN2 Future
CN3 Future

Connections

Demark
MDF
T 1
R 1
T 2
R 2
T 3
R 3
T 4
R 4
Fax
T 8
Branch
R 8

Figure 5-18 COIB(4)-U20 ETU Connections

Flashing
No Power
Not Used
Not Used
Not Used
Not Used
Not Used
T
R
T
CO
R
T
R
T
R
T
R
Installing Electronic Telephone Units
Electra Elite
Off
Idle
Idle
Idle
Idle
Idle