I managed to configure my DID with some configurations on each extension secondary number.
My Telco captures the last 4 digits and tested it's successful.
My users dial the prefix 9 followed by any outgoing number.
For example, my current system has PRI range of 200 to 399 extension numbering.
As long as the user dial out with any number that starts with the PRI number range above.
The call will not be routed to telco but directly route back to my extension number above.
If the outgoing number doesn't fall within my extension number range it works fine.
The issue now is when the user dial any outgoing number with the 3 first 3 digits which reflects their extension number. The call will not route to telco and rather than that at the 3rd digit the calls is routed back to own extension in CUCME.
Can anyone advise me why such issue occured ? Please advise me on the configuration if I may have done wrong, need help.