Specifications

Section 4: Telephones and Optional Equipment
Aspire S Hardware Manual Section 4: Telephones and Optional Equipment ◆ 4-53
4
POWER FAILURE TELEPHONES
Power Failure (Figure 4-54)
The system allows connection for basic telephone service during a power failure. The power failure opera-
tion occurs during a commercial power failure, and is not affected by PCB failure. Power Failure Transfer is
provided by connecting to the COIU PCB.
The 4COIU-S PCB provides 1 Power Failure Transfer circuit.
The CN5 connector provides connection to 4 analog trunk ports, whic
h are polarity sensitive (tip to tip, ring
to ring). The power failure circuits, however, are not polarity sensitive. A maximum of 2 4COIU-S PCBs
per system is allowed.
Connector Pin-Outs on COIU PCB for Power Failure Circuits
RJ61 Cable Connector - CN5
The CN5 and CN7 connectors are polarity sensitive (tip to tip, ring to ring).
Pin No. Connection
1-
2 SLT Interface
Power Failure Circuit - Tip
3 Circuit 2 - Tip
4 Circuit 1 - Ring
5 Circuit 1 - Tip
6 Circuit 2 - Ring
7 SLT Interface
Power Failure Circuit - Ring
8-
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