[SIPForum-discussion] Route advance query

[Ankit]

Hi Abhishek/Sandra,

I am using Stateful Proxy. Actually its a Nextone MSX Box. I am not getting
any 200 OK from my vendor side, as he is unable to terminate a particular
destination.

Problem is that he is sending the release code after 18X message. So
logically once OLC path gets established, SBC will not do route advance. But
i feel that in IP, although one way media path establishes after 18X, but it
should wait till the release code to disconnect the call without doing route
advance.

Currently SBC is not doing route advance as its taking 18X message as
primary key.

Please share your thoughts.

-- 
Thanks and Regards,
Ankit Kumar

2008/10/25 Mishra2, Abhishek (NSN - IN/Bangalore) <abhishek.mishra2 at nsn.com>

>  Hi Ankit
>
>  Till the call is successful (origin gets 200 OK) , the alternate route
> should not be discarded.  As Sandra mentioned,18x can happen due to
> hetrogeneous network. Tags are useful for such calls
>
> Thanks & Regards
> Abhishek
>
>  ------------------------------
> *From:* discussion-bounces at sipforum.org [mailto:
> discussion-bounces at sipforum.org] *On Behalf Of *ext Ankit
> *Sent:* Friday, October 24, 2008 11:45 PM
>
> *To:* Cirlincione, Sandra
> *Cc:* discussion at sipforum.org; discussion at sipforum.com
> *Subject:* Re: [SIPForum-discussion] Route advance query
>
> Sandra,
>
> Its a problem of a Voice call
>
> Call flow is like:-
>
> Clients GW<------->Our SBC<------->Vendor GW
>
> Our SBC legs are:-
>
> Leg1-- clients GW<----Our SBC
> Leg2-- Our SBC<----Vendor GW
>
> Call flow between Our SBC and Vendor GW is:-
>
> *Our SBC *                                   *       Vendor GW*
>                      Invite.....>
>                     <100 trying..........
>                     <180/183..............
>                     < 503 service unavailable----------------
>
> As, you can see above that vendor is sending us 180 and then 503. So my
> concern is that will my SBC do any route advance for my client for the same
> Call-id, if my running vendor sends me error code like above?
>
>
> --
> Thanks and Regards,
> Ankit Kumar
>
> 2008/10/24 Cirlincione, Sandra <sandra.cirlincione at boeing.com>
>
>>  This sounds like you have an intermediate device that is providing the
>> 18x response.  If that's the case, then the device that is providing the 18x
>> response, should also be receiving the 503, and would then reroute on its
>> alternate path, not return the 503 back to the vendor.  The other condition
>> is that you may get one leg connectivity, with a one-way conversation,
>> without the other side terminating.
>>
>>
>>
>> What we saw, was that we only received the 503 if the 18x could not
>> complete. If the 18x completed, but the call could still not be connected,
>> then we saw a 200 Ok message, but the call was not connected, and we
>> received a fast busy on the caller side.
>>
>>
>>
>> Are you doing voice only, or a mix of other media?
>>
>>
>>
>> *Sandra.Cirlincione @boeing.com*
>> SSG - IT, Enterprise Voice Engineering, VoIP/Convergence
>> MOC pilot *425.865.3214*    (One number reach)
>>
>> Home Office 425.373.8293
>> Desk  206.766.5888
>> Cell 425.417.3138
>> *Wishing you happiness, hope, or health, take what you need.*
>>
>>
>>
>> *From:* Ankit [mailto:erankitkumar at gmail.com]
>> *Sent:* Friday, October 24, 2008 10:01 AM
>> *To:* Cirlincione, Sandra
>> *Cc:* discussion at sipforum.org; discussion at sipforum.com
>>
>> *Subject:* Re: [SIPForum-discussion] Route advance query
>>
>>
>>
>> Sandra,
>>
>> I appreciate your response.
>>
>> As per the response code, it should definitely do route advance. But my
>> concern is that will it do route advace, if my vendor sends me the release
>> code after *18X*......not after *100 trying* message.
>>
>> Concern is that once 18X is being sent from my vendor side, it indicates
>> that OLC has been established / or Media path has been established. So will
>> route advance works, if media path has already been established on the
>> current vendor?
>>
>> --
>> Thanks and Regards,
>> Ankit Kumar
>>
>> 2008/10/24 Cirlincione, Sandra <sandra.cirlincione at boeing.com>
>>
>> Ankit,
>>
>>
>>
>> Experience over the last few days with this, would indicate that it will
>>  advance if you have something in your configuration to force the next
>> route.
>>
>>
>>
>> A 503 error seems to indicate that the service is not reachable,
>> unavailable, or cannot complete.  It basically looks like an "unsuccessful"
>> call attempt which tells your system that the route you've chosen was not
>> successful.  That reply allows the routing device to try the next preference
>> route.
>>
>>
>>
>>
>>
>> *Sandra.Cirlincione @boeing.com*
>> SSG - IT, Enterprise Voice Engineering, VoIP/Convergence
>> MOC pilot *425.865.3214*    (One number reach)
>>
>> Home Office 425.373.8293
>> Desk  206.766.5888
>> Cell 425.417.3138
>> *Wishing you happiness, hope, or health, take what you need.*
>>
>>
>>
>> *From:* discussion-bounces at sipforum.org [mailto:
>> discussion-bounces at sipforum.org] *On Behalf Of *Ankit
>> *Sent:* Friday, October 24, 2008 2:49 AM
>> *To:* discussion at sipforum.com
>> *Subject:* Re: [SIPForum-discussion] Route advance query
>>
>>
>>
>> Can somebody help me out?
>>
>> --
>> Thanks and Regards,
>> Ankit Kumar
>>
>> 2008/10/24 Ankit <erankitkumar at gmail.com>
>>
>> Hi Folks,
>>
>> I need one suggestion on a query. Scenario is:-
>>
>> Lets say we have 2 backup vendor on routing. Will the GW or Switch or SBC
>> do route advance if he gets error (lets say 503 or 34 in ISDN) from his
>> previous vendor after 18X message?
>>
>> Ex:-
>>
>> Invite.....>
>> <100 trying..........
>> <180/183..............
>> < 503 service unavailable----------------
>>
>> If yes, then why so and if no, why no?
>>
>> --
>> Thanks and Regards,
>> Ankit Kumar
>>
>>
>>
>>
>>
>>
>
>
>
>
>
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