We have a sales office 100 miles from our HO currently connected for data and phone by an expensive Leased Line (kilostream link). As we already have a Citrix and NFuse environment in place for our remote home users, I plan to save the high cost of the kilostream link by bringing the two users in our sales office in line with our home users by using a broadband connection instead. This would work very well for their computer data requirements but they need to retain their phones as extensions of our HO system. I understand that SIP phones may be the answer, but do they work with ISA servers and DMZs? What compatibility, reliability and security issues do I have to consider? What are the Pros and Cons?
