[Freeswitch-users] External forwarding and CDRs - which method to use?

[NYCPhoneService]

The call flow is:

External Number -> internal extension -> Forwarding to external number.

When I use loopback channel, the outbound CDR leg is generated with 2 second
call as it is known. I can do a post call processing in database and

Check if is_loopback=1, match inbound leg by bridge_uuid and calculate the
total call length. 

I'm trying to avoid post call processing.

For that, I tried using sip_looped_call in public context. Works well if you
change the deflect data to ${sip_to_uri} from the default
${destination_number}. However, all custom variables are lost and first leg
is written with BLIND_TRANSFER hangup cause. Billsec is 0 which make sense.
If I need to bill on inbound leg, what should I do in this case?

Any suggestions are appreciated.

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