[OpenSIPS-Users] 2 UAs behind same NAT Device

[osiris123d]

If your phone registers with the OpenSIPS proxy and has it's Public IP
address show up in the location table then it is possible to see that two
devices are on the same LAN even though they might be in different subnets. 
You would just need to know when deploying phones to keep in mind if there
are any firewalls between devices.  You could also set up an AVPOP for every
subscriber, say LANSite, and it PhoneA(LANSite) == PhoneB(LANSite) then they
both can talk directly to each other without MediaProxy.  The only issue
with this is if the user moves their phone (say they take it home).  Thats
why you would need multiple IF statements to decide if the phones need
mediaproxy.  It's possible but it depends on your specific situation.
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