Why call was not routed through other provider/trunk?

If you see that a call was not routed through the second (third/fourth/...) Provider/Trunk, take the following steps:

1. Check Call Tracing - it is possible that other Providers can't handle the call (no rates, not configured properly, not assigned to LCR, etc).

2. Check STATISTICS - Calls - Last Calls - check Hangup Cause for your failed call. If it is NO ANSWER or BUSY, then MOR does not route the call to the next provider. More details here.