[Serusers] call routing

[Steve Blair]

Well some of the details will depend upon the site you are trying to 
reach. Basically
you want to determine the caller is part of your domain, authenticate 
them if
you so choose the determine how to process the INVITE message. One possible
approach is:

     if (uri=~"^sip:[3468][0-9]{4}@bigcompany.com")
     {
       xlog("L_INFO", "\n[SER]: Outbound on-campus call. Going to route 
block #2\n");
       route(2);
       break;
     };

This will check the request uri to see if it begins with sip: followed 
by either a 3,4,6 or 8
followed by four digits with each digit ranging from 0-9. If there is a 
match call
flow jumps to route block #2 (my own choice of numbering). Route block #2
does:

route[2] {

  xlog("L_INFO", "\n[SER]: Route block #2 campus 5-digit extensions:
       Time: [%Tf] Method: <%rm> From uri <%fu> To < %tu> IP source 
address <%is>
       R-uri: <%ru> Contact Header: <%ct> \n\n");

         rewritehostport("18.9.6.8:5060");
         t_on_failure("1");
         t_relay();
         break;
}

  This is a scaled down version of what I actually do. It is for 
illustration purposes only.
The IP address in the rewritehostport  statement is the address of my 
primary PSTN
gateway. The t_on_failure will cause call flow to be directed at the 
backup PSTN
gateway should the primary be unavailable.


Good luck,
Steve

Edgardo O. Gonzales II wrote:

>
> Hi!
>
> Can somebody teach me how to enable call routing .. Meaning if the 
> called number is not on my
> routing table, I will forward the request to another sip gatekeeper ..
>
> Need it so badly.. please help ..
>
> thanks,
> ed
>
> _______________________________________________
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> serusers at lists.iptel.org
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