I have an IP office 403 and would like to set up a remote office. At the remote office I have dsl and linksys router, at the main office I have dsl and another linksys router. I'm looking for the overview of how to set up a 4600 ip phone at the remote site. Do I use a VPN session? System architecture? What paramaters need to be set up on the 4600 phone during startup? A point in the right direction would be greatly appreciated.