[SIPForum-discussion] Route advance query

[Ankit]

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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