Hi we use vFone which is pretty good and they had given us a discount on units that we use in differnet offices to talk to each other.. their website http://www.inter-call.com
Good Luck
Jim
If at time some time calling points expired and or used, how long would it take before the ID number be removed and cancelled. And if so, can I reactivate same ID number or should I need to buy new IP since ID number is incorporated in the set itself?
yes you can install to ip phones one on each site and get a public ips in both of these phones and there you can dail the ip to ip with out voip gateway