Our company currently has a number of Verizon local copper trunks and DID lines arranged into a few trunk groups both through them and on our PBX. The total is around 23 in all. Do you think we would be better off dumping those and picking up a T1 ISDN-PRI line? What are the pros and cons of each? From what I can tell so far is that the cost will be close to the same either way. Any help deciding this would be helpful. I have been told that if we went with a Shoretel IP phone system the hardware cost would be less if we had the T1.