[Serusers] how to search in usrloc?

[SER LIST]

You do not need to check usrloc t to implement what you want. Define a timer 
and when you forward the INVITE to the PBX, you will automatically jump to 
the failure_route[] if you do not receive a response from the PBX (PBX 
down!) and you can put your logic there.


>From: "sandrinho1976 at libero.it" <sandrinho1976 at libero.it>
>To: "serusers" <serusers at lists.iptel.org>
>Subject: [Serusers] how to search in usrloc?
>Date: Fri,  3 Nov 2006 01:13:24 +0100
>
>Hi everyone.
>
>I'm facing this problem when configuring a Ser as a proxy and a registrar.
>
>I have the Ser and a IP pbx: the pbx registers itself on the proxy as
>pbx@<pbx_ip> (Contact header).
>I had to manage INVITEs messages for incoming call that are going
>towards the Ser, sent by UACs in the network.
>
>INVITEs are coming in the form <telephone_number>@<ser_ip> (Req-URI):
>Ser had to decide if <telephone_number> is managed by the IP pbx (it has 
>this information) and eventually, do a rewrite uri to
><telephone_number>@<pbx_ip> and then forward the message to pbx.
>
>So far, it's all ok.
>
>Unfortunately, i have to handle also this situation: the ip pbx is down.
>At the present, the INVITE is forwarded towards the pbx, the ip pbx does 
>not respond and after 10 seconds the requesting UACs sends a CANCEL.
>This latency is not acceptable.
>I'm looking for a way to implement this:
>after the rewrite uri to <telephone_number>@<pbx_ip>, look if I have a
>contact in usrloc with <pbx_ip> (i.e. the pbx is still registered): if
>not, send immediately a response 4xx to UAC.
>The problem is that i'm not able to access the usrloc db from the
>routing script... any hint?
>
>Thanks a lot...
>
>
>
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