Section 2: PCB Installation and Startup
Aspila EX Hardware Manual Section 2: PCB Installation and Startup 2-23
2
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.
! Important !
• 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.
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