I have a setup in Paris where 99% of calls work but from some selected numbers - when they dial in - we are unable to hear them.
We have Call Manager 6.1.2 and in Paris an H323 voice gateway. As I state - almost all calls work fine for this site.
The only difference between these calls and the majority of others is that they come in with Plan ISDN and type National (though some calls with those parameters actually work!).
Does anyone have any ideas for this intermittent and annoying fault!