Hello,

thanks for answer. :-) Strange is that is acting like that only for 5 - 10% of 
all calls from same provider and same number. And when i was comparing
packet traffic only difference is on sipx end, it start with 
"SIP/sipfrag Request: NOTIFY sip:[email protected]:5060, with
Sipfrag(SIP/2.0 503 Service Unavailable)."

Today i found out that in this moment there is only 8MB of memory free on my 
sipx machine, can this be a problem ? There is plenty of not used swap.

thanks

Matus

On Friday 13 of February 2009 16:48:34 you wrote:
> This is an issue with the limitations of the patton gateway acting as a
> b2bua. I used that for a while and found transferring calls did not work
> with another provider either.
>
> I think doing this with a patton gateway is hazardous. It will work with
> most providers with DID's, but being able to transfer it after it is
> received is another thing. The AA will be one of the most difficult things
> to overcome.
>
> I don't tihink this is a sipx issue though, it's just an interoperability
> issue for the patton being able to do something it really wasn't really
> meant to do. Both your gateway and provider need to support refer, and
> that's the bigger issue.
>
> I'm on my 3rd ITSP already and they are NOT all the same with the options
> they support.
>
> Tony
>
> >>> Matus <[email protected]> 02/13/09 10:17 AM >>>
>
> hello,
>
> I'm using voxbone as a trunk provider for my sipx server ( 3.10.2 on gentoo
> ).
>
> When im using direct connection - voxbone is directly connecting to sipx
> server - it is working 100% perfectly.
>
> But when i try to use patton between voxbone and sipx then there is a
> problem. Autoattendant ( which is default on my sipx ) is working OK, but
> any forward to real human extension will end with silence after "please
> hold while i transfer your call" in 10% of all attempts. 90% of all
> connections working fine.
> I have no NAT, all machines using real IP's, no firewalls. In tshark i can
> see this message:
>
> SIP/sipfrag Request: NOTIFY sip:[email protected]:5060, with
> Sipfrag(SIP/2.0 503 Service Unavailable).
>
> thanks for help
>
> Matus
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