Typically we deploy callmanager using the CallManager MGCP Service Parameters to prefix a 90 to national numbers and 900 to international numbers inbound from the PSTN. This gives users a missed calls list that includes the correct prefixes needed to access the PSTN (9) and national numbers (0) or int'l numbers (00).
Several TAPI applications don't seem to heed this prefix - it seems they read the 'UnmodifiedCallingPartyNumber' from TSP, instead of the 'CallingParty'. Please see the example TSP log below, where CallingParty =9079xx278xxx but UnmodifiedCallingParty =79xx278xxx later in the trace :
I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...