CÔNG TY VIỄN THÔNG VIỆT PRO
Analogue Trunk (4/8COIU) PCB (Figure 2-12)
There are two different types of the COIU PCB. One providing ground start trunks - the other is for
loop start trunks only.
The COIU-LS1 PCB provides:
•
4 (4COIU-LS1) or 8 (8COIU-LS1) analogue loop start line/trunk circuits - no ground start is pro-
vided
•
4 (4COIU-LS1) or 8 (8COIU-LS1) trunk status LEDs
•
4 (4COIU-LS1) or 8 (8COIU-LS1) Caller ID Circuits
•
2 (4/8COIU-LS1) Power Failure Transfer Circuits
•
1 PCB status LED
•
1 run/block switch
The COIU-LG1 PCB provides:
•
4 (4COIU-LG1) or 8 (8COIU-LG1) analogue ground start line/trunk circuits
•
4 (4COIU-LG1) or 8 (8COIU-LG1) trunk status LEDs
•
4 (4COIU-LG1) or 8 (8COIU-LG1) Caller ID Circuits
•
2 (4/8COIU-LG1) Power Failure Transfer Circuits
•
1 PCB status LED
•
1 run/block switch
The CN3 and CN5 connectors each provide connection to 4 analogue trunk ports, the analogue trunks
and power failure circuits are not polarity sensitive. A maximum of 16 4/8COIU-LS1 PCBs per sys-
tem is allowed.
•
When using the COIU-LG1 PCB for ground start trunks, the PBX ground must be connected as
described on page 1-32 or the trunks will not function correctly.
•
When connecting the RJ61 cables to the COIU PCB, note the position of the Power Failure con-
nector. Do not confuse this connector as the trunk connector.
Aspila EX Hardware Manual
Chuyên phân phối tổng đài NEC
Section 2: PCB Installation and Startup
! Important !
Section 2: PCB Installation and Startup
http://vietpro.com.vn
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