SIP, Session Initiation Protocol, is a reliable, flexible, and cost effective way to communicate with your clients. You can add trunks in a short amount of time from local numbers to 800 numbers. Call recording is simplified and call records are easier to manage. You can get more concurrent calls at a minimal cost than a regular phone line.Your bandwidth determines how many voice channels you can support. Call us and find out how much you can save with SIP.