[SR-Users] Problem implementing Outbound Proxy

Christoph Russow russow at emtex.de
Fri Nov 26 13:01:42 CET 2021

yeah the only thing different are the private ips and the record-route 

the carrier needs a special request thats why the +e164 to and e164 
everywhere else and the <prefix>e164 in invite header.

if i start the call directly from freeswitch to the carrier (without 
kamailio proxy) it works.

so i think maybe (as this is our main carrier) i need some other way to 
solve that.

Best regards

Am 26.11.21 um 12:56 schrieb Karsten Horsmann:
> Hi Christoph,
> sorry i overlooked that. Seems okay to me. So IMHO its "okay" in SIP.
> Your Carrier didnt like it.
> First - i would try to ask the Carrier -
> The Error Message "503 Service Unavailable-No Bandwidth Available" seems 
> to me like a blocking rule on the carrier side.
> Could be mixed +e164 (in To) vs e164 in From/PAI/whatever - the 
> Contact-Header or something else.
> The other way is to capture a working outbound call and then try to 
> check what's different.
> Best
> Karsten
> Am Fr., 26. Nov. 2021 um 11:18 Uhr schrieb Christoph Russow 
> <russow at emtex.de <mailto:russow at emtex.de>>:
>     hi,
>     thats what i did on our application servers (freeswitch gateway
>     config).
>     kamailio routes the calls as wanted but the carrier rejects it (see
>     pcap
>     file in first email).
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Christoph Russow
Software Engineer

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