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Cisco Bug: CSCvs89295 - Calling party transformation mask is selected based on the pre transform calling number

Last Modified

Jun 04, 2020

Products (1)

  • Cisco Unified Communications Manager (CallManager)

Known Affected Releases

12.0(1.10000.10)

Description (partial)

Symptom:
The calling party transformation mask is selected based on the pre transform calling party number (extension assigned to the IP Phone).

Conditions:
>> For a better understanding please refer the below example:


++ Call flow:
-----------------
IP phone -> CUCM -> sip trunk -> Cube

++ Calling number: 1002  <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< Pre transform calling number

++ Let's assume that 1002 initiated a call to 4444
++ Now according to the CUCM config, let's say that there is a route pattern (4444) configured which is supposed to route the call out to a cube via a SIP trunk
++ Under the route pattern 4444, we have configured a prefix *64 under the Calling Party Transformations section
++ So when the call reaches the route pattern, the calling number is transformed to *641002

++ We also have configured 2 calling party transformations in CUCM

  1.  Calling party transformation 1 is configured with pattern 1002 (configured with calling party transformation mask 123)
  2.  Calling party transformation 2 is configured with pattern *641002 (configured with calling party transformation mask 456)

++ The route pattern 4444 is configured to send the call to a SIP trunk

++ The SIP trunk is configured  with a calling party transformation CSS  under the Outbound calls section to transform the calling party by using a calling party transformation.

++ This is the point where we are confused, as to which calling party transformation will be selected among 1002 and *641002.

++ According to the DNA it was *641002 but we were observing from the SIP messages and the actual behavior that 1002 calling party transformation was being selected.

++ There is defect filed for incorrect behavior of the DNA (CSCvs56049)

++ Now when choosing the calling party transformation, CUCM will choose the pattern which is matching the pre transform calling number and the calling number will be transformed to 123.
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