ip connection is my preferred, but some of the places I work with do not have public IPs so that is not an option. I have just had a lot of problems with the modem connections to the maintenance port. The port is just pretty sensitive. At times some things work and others don't. I seem to have reasonably decent luck with the thing on a private line. Also I know some people who said they have more luck with the 33.6 Robotics as opposed to the V.92