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<p class=MsoNormal>Hi Guys,<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I’ve been working at setting up a couple of FreeSwitch
nodes as a topology hiding SBCs that handles both ingress traffic from my<o:p></o:p></p>
<p class=MsoNormal>providers/peers and pass traffic up to an openser router
that then routes call across the cluster of SBCs through which they reach the
destination.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I have OpenSIPS/SER setup doing DB route lookups and ENUM
with LCR/Serial forking etc.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>My question is what would be the best way to send a call out
to a destination choosen by the OpenSER router?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>For example:<o:p></o:p></p>
<p class=MsoNormal>SIP Provider -- > SBC --- > OpenSER ---- ( route
lookup returns 123.123.123.4 as dest ) -- > SBC --- > 123.123.123.4<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I was thinking something along the lines of adding a “X-Route-To:
<a href="mailto:+1NXXNXXXXXX@">+1NXXNXXXXXX@</a>123.123.123.4” with
openser<o:p></o:p></p>
<p class=MsoNormal>and then something like this in the SBC…<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal> <context name="from-sipcore"><o:p></o:p></p>
<p class=MsoNormal> <extension name="outboundroute"><o:p></o:p></p>
<p class=MsoNormal> <action
application="bridge" data="sofia/external/${sip_h_X-Route-To}"
/><o:p></o:p></p>
<p class=MsoNormal> </extension><o:p></o:p></p>
<p class=MsoNormal> </context><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Is this a wise approach, is there anything I could do to do
this better?<o:p></o:p></p>
<p class=MsoNormal>I’d like to keep the logic in the SBCs as simple as
possible.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I am pretty familiar with SIP but my knowledge fades when it
gets into the nitty gritty of routing… ie the Contact: and Via: headers<o:p></o:p></p>
<p class=MsoNormal>and all that good stuff.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>I should also state I have two profiles defined one for the
internal/private “core” network and one for the outside “external”
network.<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Any thoughts on this at all would be greatly appreciated.<o:p></o:p></p>
<p class=MsoNormal>Am I missing something in the SIP spec that would allow for
this is a standardized way?<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Regards,<o:p></o:p></p>
<p class=MsoNormal>-Adam<o:p></o:p></p>
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