[Users] Mediaproxy Clarification

I would really appreciate any feedback or clarification on my understanding of Mediaproxy. It appears that Mediaproxy can be setup in such a way to allow load balancing based on domain. This seems to be the only native mechanism for getting any sort of pseudo geo-location out of it. My understanding is as follows... My users ATAs will query DNS which will direct them to a SIP proxy based on my SRV records. The SIP proxy (SER) machines will be running proxydispatcher.py and have the required mediaproxy module loaded. In addition, the SER machines may also have mediaproxy.py running locally, or mediaproxy.py may be on separate machines altogether. When a request for routing comes into the SIP proxy it is determined then if rtp proxying is necessary based on source IP. If rtp proxying is required, proxydispatcher.py send a DNS query to locate a suitable mediaproxy server. This is where SRV is used to decide (based on domain) which mediaproxy server is to be used. Given this, a separate domain would need to be setup for each geographic region that is be served by one or more mediaproxy servers. Then these domains are published to SRV to facilitate the lookups performed by each proxydispatcher.py instance. Please let me know if I'm understanding all of this correctly. Thanks! - Daryl