Power Failure Transfer - NEC NEAX 2400 ICS Features Manual

P-3
P-3
General Description
This feature provides for certain specified trunks to be automatically connected to designated stations in
the event of a loss of AC power. It is normally used when the system is not equipped with reserve power.
Operating Procedure
Operation is automatic if there is loss of input power to the system.
Service Conditions
1. If the Central Office is wired ground start, stations must be equipped with ground buttons to
complete calls over the exchange network.
2. Power failure station lines should not be wired to common bells (outside power source required).
3. Type of telephone set (DP or DTMF) connected to CO line via POWER FAILURE TRANSFER
shall be corresponding to the signaling system of the Central Office.
4. The maximum number of POWER FAILURE TRANSFER circuits per PIM is 24. (12 circuits/
package)
5. The Power Failure Trunk (PFT) and associated Central Office Trunk should be in the same PIM.
6. When the POWER FAILURE TRANSFER feature is activated, telephone service is limited to
incoming calls and/or outgoing calls via the serving Central Office.
7. When the NEAX2400 ICS is in Power Failure mode of operation, DID calls cannot be received.
term
8. D cannot be used as Power Failure stations.
9. All calls in progress and/or established calls are lost when a POWER FAILURE TRANSFER
occurs. When commercial power is restored, the NEAX2400 ICS is automatically reinitialized.
Back-up service is provided via the HDD unit to retain the following features:
CALL FORWARDING
SPEED CALLING - GROUP
SPEED CALLING - STATION
NAME DISPLAY DATA
Interactions
1. A PFT circuit card is required.
2. The POWER FAILURE TRANSFER station and associated Central Office trunk must be on the
same Module Group.
3. When power is lost and the POWER FAILURE TRANSFER (PFT) feature is activated, telephone
service is limited to incoming and outgoing calls via the predesignated PFT stations.
4. DID service will be lost, as this service is dependent on the operational status of Incoming IRTs.
term
5. D instruments cannot be used as PFT stations.
6. When power is lost, all calls (station-to-station and station-to-trunk) are lost. When power is
restored, PFT calls will stay up until manually disconnected by the participants. Service to the
PFT stations is then restored to normal.
Page 404

Power Failure Transfer

Power Failure Transfer
[C-2, C-2D, C-3, C-3D, C-5, C-5D]
[S-23]
[S-21]
[N-28]
NEAX2400 ICS Business Features and Specifications
NDA-24143, Issue 4