How to set up inbound routing in FreePBX when making a parallel call from multiple trunks?

Question

Telephony

There are four trunks. Needed to be able to have parallel conversations. All on one account from the provider MARK.
The situation is as follows: the provider sends information about the call to all 4 trunks, one FrePBX server is involved in processing. The call from all trunks is routed to the same call group. And it turns out that one call comes as four and continues to go even after you pick up the phone.

Answer 1

1) Ask the provider MARK to change the call scheme from "CALL ALL" to "CALL BY QUEUE";
2) Can be done through groups:

exten => _X.,1,Set(GROUP()=${CALLERID(num)}${EXTEN})
same =>        n,GotoIf($[${GROUP_COUNT(${CALLERID(num)}${EXTEN})}>1]?drop)
same =>        n,Dial(SIP/xxx/xxx)
same =>        n(drop),Congestion

Or something like that. But it's a crutch.

Answer 2

Specify the context in the trunk registration line:
user:[email protected]/XXXXXXXXXXX