[Freeswitch-users] inbound-late-negotiation and attended transfer

[Dmitry Bely]

I have G722 and PCMU enabled for internal extensions and PCMU only for
an external gateway. Inbound-late-negotiation parameter is set so then
an incoming call arrives PCMU is used without transcoding. But it goes
worse when transfer is involved:

call 1: gw <-- PCMU--> FreeSwitch <-- PCMU --> operator
call 2: operator <-- G722 --> FreeSwitch <-- G722--> extension
transfer (refer): gw <-- PCMU--> FreeSwitch <-- G722--> extension

Is it possible to renegotiate a codec during transfer to get rid of transcoding?

- Dmitry Bely