NEC Aspire Product Description page 22

Section 2: Components
4 CO Loop Start/Ground Start Trunk Card (4COIU-LG1) — P/N 0891029
8 CO Loop Start/Ground Start Trunk Card (8COIU-LG1) — P/N 0891028
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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:
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
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.
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.
The 8COIU-LG1 provides the same features as the 4COIU-LG1 except for the following changes:
The 8COIU-LG1 PCB provides:
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
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.
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.
! Important!
! Important!
Product Description