NEAX2400 IPX ISDN Features and Specifications
NDA-24311, Issue 1 Page 111
PRI Failsafe Routing P-49
P-49 PRI Failsafe Routing
General Description
When call origination via ISDN network is not available due to failure, etc., this feature allows the call to be placed
via alternative route (public switched network).
Operating Procedure
No manual operation is required.
Service Conditions
1. This service is not available for the following call origination.
a.) Tandem connection from MFC trunk
b.) Call origination by Data Adapter/Data Module.
2. When there is no alternative route, the call is treated as all routes busy.
3. The following services are not available when all routes are busy.
INTER-OFFICE OFF-HOOK QUEUING [I-11]
OFF-HOOK QUEUING [O-7]
OUTGOING TRUNK BUSY ANNOUNCEMENTS [O-21]
OUTGOING TRUNK QUEUING [O-2]
OUTGOING TRUNK QUEUING - Dterm [O-2D]
OUTGOING TRUNK QUEUING - ATTENDANT [O-16]
ROUTE RESTRICTION - ANNOUNCEMENT [R-27]
4. Authorization code cannot be dialed in case of tandem connection from ISDN trunk.