need your help for CIsco callmanager express

kingelka

Hi !
l have two sites connected via leased line
On main site (site A ) l have a 2800 series router with callmanager express , one Cisco 2960 switch and few cisco ip iphone (SPA 525 G2). What l want now is to deploy 2 ip iphone on the second site (site
On this second site I have a firewall ASA 5505, one cisco switch 2960 and two ip phones . I dont have à callmanager on this site. I need to allow call between two sites sites.
is it possible to use only site A callmanager express for managing call for two sites? My network is a small one , and finally we will have a maximum of 20 phones on all sites.
I need your feedbacks, your experience and will appreciate all ideas.
I m beginer with Cisco VOIP and that is my first project on this tools.
Thanks !!!

shodown

I have done this before. There are a few ways to do it. One way I do it is setup a site to site tunnel and allow the phones to register to the CME. Also some of the Phones now have VPN's built in and they can make there own VPN tunnels back to the CME.