[OpenSIPS-Users] convert 180 to 183 after the fact

[Jeff Pyle]

Hi Laszlo,

Unfortunately the effect for the caller would be the same - ringback would
stop.

Here's the whole flow.  My terminating gateway is SIP to ISDN PRI.  Call
terminates through the gateway to a particular mobile switching office.  I
receive an ISDN PROGRESS message with inband audio.  This translates to the
183 with SDP.  Then I receive an ALERTING message with no inband audio.
 This translates to the 180.  When the MSO sends the ALERTING, it has
stopped sending the inband audio from the previous PROGRESS message.

I'm thinking I need to do something else in the onreply_route to connect to
the media server for a new 183.  Since I've executed t_relay to route the
INVITE to the gateway, it seems my options are limited.


- Jeff



--
Jeff Pyle <jpyle at fidelityvoice.com>
Director, Voice Engineering
Fidelity Voice and Data
216-245-4106
www.fidelityvoice.com



On Mon, Sep 23, 2013 at 8:57 AM, Laszlo <laszlo at voipfreak.net> wrote:

> What if you simply drop the 180 in the onreply_route?
>
> -Laszlo
>
>
> 2013/9/23 Jeff Pyle <jpyle at fidelityvoice.com>
>
>> Hello,
>>
>> I have one particular PSTN call flow that causes a 183 with SDP, then a
>> 180 without SDP prior to 200 OK.  Some of my customer endpoints don't
>> handle the 180 properly after a 183 and they cease to hear ringback.
>>
>> I'm thinking through how intercept the 180 and convert it to a 183 with
>> SDP.  I have a media server available to generate the 183 and the media.
>>  I'm struggling with how to relay the INVITE to the media server when the
>> 180 arrives in the middle of the call setup.
>>
>> Any recommendations are appreciated.
>>
>>
>>
>> Regards,
>> Jeff
>>
>>
>> _______________________________________________
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>> Users at lists.opensips.org
>> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>>
>>
>
>
> --
>
> --
> Kind regards,
> Laszlo Bekesi
> http://voipfreak.net
>
> _______________________________________________
> Users mailing list
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> http://lists.opensips.org/cgi-bin/mailman/listinfo/users
>
>
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