There are several defective modems currently in the system that work intermittently. Some others glitch every once in a while. With 70 modems going night and day, it is to be expected. The best you can do is redial in. There is a randomizer that selects a different modem if one is available and you can connect with that one. If CCN is really busy, you may get the same modem repeatedly for several dials. Just stick with it and you will get through. We try to replace bad modems when we can find them.