We just changed carriers for our two PRI's. Since then our outbound only fax (analog) calls do not connect. We get a fast busy signal. We have worked with the carrier and they are getting the call but their switch is dropping the call. They said our analog calls come in as 3.1KHz audio and the non-analog calls work but they hit the carrier as "speech". The other issue they say it "might" be is that our analog "Calling_Num" is type and plan "unknown". Whereas the digital calls that work the "Calling_num" ISDN/telephony. Any ideas on how to get this changed or should the carrier be able to handle this?
I think you should show this last trace to telco and ask how do they really want the call to be.
The succesfuk one, incoming, has bearcap 3.1KHz and called type/plan ISDN/unknown. Perhaps they want it that way. Perhaps they want all nine digits for local calling too.
I have not seen a trace of a succesful call from IP phone to the smae number, else I would compare to that as well.
By now I think you have understood how to change the call parameters.