provided by Star2Billing S.L.

hi, my SIP supplier give me two prefixes with different rates.
prefix 1111 is A-Z high quality another one prefix 2222 is wholesale quality.
so I setup two trunk a) prefix 1111 and b)2222
trunk b setup failover to a)

can I do that? my problem is calls always go to trunk a) and didn't see any call goes to trun b)

simply add 2 trunks with provider infomation

1 normal route - add prefix 1111
2 premium route - add prefix 2222

Set fail over for normal route, call will be routed to 2nd if CONGESTION msg received