I am trying to setup two offices that have a VPN connection to each other - each office has a SPA9000 and SPA400 combo. I would like to be able to dial extensions between the sites, but am unable to locate any doc on how to setup a site to site sip trunk ( I think I can figure out the dial plan if I can get the two 9000s to register). Can someone point me in the right direction?
Thanks for the reply. I am slightly confused though. There is another thread (https://www.myciscocommunity.com/thread/11177?tstart=0) where it is referenced that "You can have 3 SPA9000, but not behaving as a single unit. You would need to connect 1 SIP trunk to each of the neighbors (i.e. two SIP trunks).". How do I go about making this happen?
From the description at that link, it sounds like you would obtain a SIP trunk from an internet phone service provider for each spa9000. So you can then call the other spa9000 after you have that new SIP trunk number.
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