[Freeswitch-users] Freeswitch not correctly terminating dialog with BYE for T.38 invite

[Ken Rice]

The 408 is terminating the dialog .... Its a 400 error response to the
INVITE......

BYE is used after the session is established...

Example 

UAC -> INVITE        -> UAS
UAC <- 100 TRYING    <- UAS
UAC <- 404 NOT FOUND <- UAS
UAC -> ACK           -> UAC


Note this is a complete transaction and there is No Bye here... The 404
tells the UAC that we¹re at the end of the call...

When the provider sends FS a 408, this is telling FS sorry we¹re giving up
because the terminating end isnt responding...



On 7/25/13 9:59 AM, "Bruce Lefko" <blefko5361 at gmail.com> wrote:

> Hi there!
> 
> We have a situation, primarily with specific numbers, where freeswitch
> executes a T.38 INVITE and our SIP provider is responding with a 408 Request
> Timeout, and Freeswitch responds with an ACK. 
> 
> However, no BYE is sent and our SIP provider thinks the call is still active,
> and ends up billing us for a lot of dead air.  Thankfully they have a timeout
> and stop billing us after 6 hours, but its still costing us a lot of money.
> 
> The error Freeswitch is giving us in the cdr for this call
> is: RECOVERY_ON_TIMER_EXPIRE
> 
> We've used the latest code from git as well as 1.2, and the issue persists.
> 
> Furthermore, the SIP provider claims this is not correctly following the
> RFC:If the response for a request within a dialog is a 481
> (Call/Transaction Does Not Exist) or a 408 (Request Timeout), the UAC
> SHOULD terminate the dialog. A UAC SHOULD also terminate a dialog if
> no response at all is received for the request (the client
> transaction would inform the TU about the timeout.)
> 
> For INVITE initiated dialogs, terminating the dialog consists of
> sending a BYE.
> 
> Thanks!
> 
> 
> _________________________________________________________________________
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> http://www.freeswitchsolutions.com
> 
> 
> 
> 
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-- 
Ken
http://www.FreeSWITCH.org
http://www.ClueCon.com
http://www.OSTAG.org
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