Need your help in understanding this.
There's a central location with let's say 5 ATAs and some 10 remote locations each with one ATA.
AIM - To have communication between all the analog phones connected to ATAs in all locations.
Challenge - CCM or CCME can not be positioned.
Solution - Have SIP firmware running on ATA considering the fact that H.323 and MGCP images are EOS for ATA.
Now all these ATAs can not have a communications amongst each other witohut an additional component.
My undersanding is that the additional component would be a proxy server. Do I need a Registrar server [Or a proxy server which can act as a registrar server] also?
Considering the fact that Cisco SIP Proxy server is EOS is there any product from cisco which can help achieve this? At this point of time I am not considering any third party products and wanted to explore Cisco Product line to achieve this.