We faced with one problem, i will try to explain the case:
Our outbound calling system works via Asterisk. Whn i try to call ti turned off mobile number i can’t hear any information about this number is not working, it look like the number is active and no body answer but in actually this number is turned off. When i call directly from my router i don’t have any problem. My outbound call-center scheme looks like this: Cisco ip phone - CUCM - Asterisk - Cisco router-E1(T1)-mobile service provider.
Hope i can explain to you my problem. Will be glad to get any help from you.
Thanks in advance.