[Users] DID Origination

This post is definitely going to be off-topic and I ask for your forgiveness in advance. However, we are a cable ISP and are looking to provide voice services to our cable modem subscribers. We've been in talks with several companies which provide DID Origination and Termination but want to make sure we've covered them all before making a decision on which to pick, or would like to get suggestions from anyone in our same (or like) position of companies to look at or stay away from. You can reply to me directly to prevent the list from being populated with off-topic subjects. Thanks, Kw