[Freeswitch-users] ACK to 200 OK in a Bridge

[Ken Rice]

This shouldn¹t be a problem... The call is answered as soon as FS gets the
200 OK from the termination leg...  Also keep in mind that FreeSWITCH has
sofia do a few things automattically like the 100 trying is done automagic
by the sofia lib...

Also FreeSwitch is a B2BUA not a Proxy so the the A Leg can operate
independently of the B leg...


On 7/20/12 7:48 AM, "Stephen Wilde" <wstephen80 at gmail.com> wrote:

> I have the following issue: if I do a bridge of an inbound call to an outbound
> call, when the called number answer the call with a 200 OK, FreeSwitch sends
> the ACK instantely, without wait the ACK of the calling.
> 
> The message flow (as shown in the attached .png) is:
> 
> CALLING              FS       CALLED
> 
> INVITE       --------->
> 100 Trying <---------
>                              -------------> INVITE
>                              <--------- 100 Trying 
>                              <--------- 200 OK
>                              -------------> ACK
> <--------- 200 OK
> -------------> ACK
> 
> 
> 
> When I expected that the ACK to called is related to ACK from the calling:
> 
> CALLING              FS       CALLED
> 
> INVITE       --------->
> 100 Trying <---------
>                              -------------> INVITE
>                              <--------- 100 Trying 
>                              <--------- 200 OK
> <--------- 200 OK
> -------------> ACK
>                              -------------> ACK
> 
> 
> 
> For this reason, if sometimes the Calling doesn't send the ACK (because it
> reject the 200 OK), the call is considered connected (and billed) by
> Freeswitch (30s, probably due to a timeout waiting ack) and not by Calling
> (0s).
> There is a way (config?) to send ACK to called only when is received the ACK
> from calling?
> 
> Stephen
> 
> 
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> 
> 
> 
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