NEC Aspire Manual page 43

4 CO Loop Start/Ground Start Trunk Card (4COIU-LG1) — P/N 0891029
There are two different types of the COIU PCB. One providing ground start trunks - the other is for
loop start trunks only.
The 4COIU-LG1 PCB provides:
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The CN3 connector provides connection to 4 analog trunk ports, which are polarity sensitive (tip to
tip, ring to ring). The power failure circuits, however, are not polarity sensitive. A maximum of 15
4COIU-LG1 PCBs per system is allowed, each PCB consuming 4 ports.
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8 CO Loop Start/Ground Start Trunk Card (8COIU-LG1) — P/N 0891028
The 8COIU-LG1 provides the same features as the 4COIU-LG1 except for the following changes:
The 8COIU-LG1 PCB provides:
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The CN3 and CN5 connectors each provide connection to 4 analog trunk ports, which are polarity
sensitive (tip to tip, ring to ring). The power failure circuits, however, are not polarity sensitive. A
maximum of 15 8COIU-LG1 PCBs per system is allowed, each PCB consuming 8 ports.
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Product Description
4 analog ground start / loop start trunk circuits
4 trunk status LEDs
4 Caller ID Circuits
2 Power Failure Transfer Circuits
1 PCB status LED
1 run/block switch
When using the COIU-LG1 PCB for ground start trunks, the PBX ground must be connected
or the trunks will not function correctly.
When connecting the RJ61 cables to the COIU PCB, note the position of the Power Failure
connector. Do not confuse this connector as the trunk connector.
8 analog ground start / loop start trunk circuits
8 trunk status LEDs
8 Caller ID Circuits
2 Power Failure Transfer Circuits
1 PCB status LED
1 run/block switch
When using the COIU-LG1 PCB for ground start trunks, the PBX ground must be connected
or the trunks will not function correctly.
When connecting the RJ61 cables to the COIU PCB, note the position of the Power Failure
connector. Do not confuse this connector as the trunk connector.
Section 2: Components
! Important!
! Important!
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