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13-30 ETSI PRI
Network Recore (PNR) will not always be cut for card calls receiving a
routing response because of the Enhanced International Routing feature.
For Routing or Failure Response, VNET call processing is used to terminate
the call or invoke the related treatment.
Enhanced overflow
Enhanced overflow is supported for terminating ETSI PRI interfaces if the
ENHANCED_OVERFLOW office parameter is set to "Y" at the originating
DMS-250 switch.
Enhanced overflow is invoked when the following occurs:
The following NCS overflow action codes are supported:
Enhanced overflow is also supported for Remote Access and Suppcode
collections on ETSI PRI trunks. Two existing ADF parameters, NO
ANSWER TIMER and NCS INFORMATION, are used. If a No Answer
Timer is received from the DAP/NCS in the Suppcode Response, the No
Answer Timer will determine the length of time the originating switch
allows the call to wait for an answer before attempting overflow.
The No Answer Timer is started under the following conditions:
297-2521-106 Standard 23.01 March 2001
A call cannot terminate due to an all trunks busy condition or the trunk
receives a release message from an ETSI PRI with a non-normal release
cause or no answer timer.
Direct termination overflow is allowed for that call (through the NCS
action code); then enhanced overflow is invoked.
2—7-digit termination with overflow
11—10-digit termination with overflow
12—DDD routing with overflow
13—international with overflow
51—flexible termination with overflow
53—outbound VNET with overflow
The originating switch receives an Address Complete Message (ACM)
from a termination ISUP trunk.
The originating switch receives an Alerting message from an ISDN PRI
terminating trunk group.
Outpulsing is completed on a PTS trunk.
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