We have 2 IP Office 500 systems with the network software (on each), were in the beginning process of establishing the WAN communications between the two. There are high speed internet connections at both locations. All CO's are copper, the only reason for the network software is to establish 3 digit extension dialing between the two locations. What is the best way to accomplish this task? Will we be able to utilize the exsiting equipment or will we be required to purchase additional hardware?