NEC UX5000 - Power Failure Terminals; Power Failure (Figure 4-37); Connector Pin-Outs on COIU Blade for Power Failure Circuits

Chapter 4 - Terminals and Optional Equipment
Chapter 4 4 - 65
SECTION 4-16
POWER FAILURE TERMINALS
4.16.1 Power Failure (Figure 4-37)
The system allows connection for basic telephone service during a power failure. The power failure
operation occurs during a commercial power failure, and is not affected by blade failure. Power Failure
Transfer is provided by connecting to the COIU blade.
The 4COIU blade provides 2 Power Failure Transfer circuits. The CN3 connector provides connection to 2
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 25 4COIU blades per system is allowed.
4.16.2 Connector Pin-Outs on COIU Blade for Power Failure Circuits
RJ61 Cable Connector - CN3, SLT Interface for Power Failure
Pin No. Connection
1-
2-
3 Circuit 2 - Tip
4 Circuit 1 - Ring
5 Circuit 1 - Tip
6 Circuit 2 - Ring
7-
8-
! Important !
When connecting the RJ61 cables to the COIU blade, note the position of the
Power Failure connector. Do not confuse this connector as the trunk connector.
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