You have been idle for 30 minutes or more. Our system is programmed to disconnect you after 30 minutes of inactivity. This feature prevents you from incurring a large bill should you forget to disconnect your modem at the end of an Internet session. A reasonably common problem is that customers get disconnected while typing up a long email. These alarms will periodically dial the base station to test communications, and this will cause a modem that is sharing the same line to drop any current connection.
Some alarms also dial when they are armed or disarmed.
Most Internet connection software has an option to disconnect the modem after a certain period of inactivity. Windows 95 in particular counts keyboard and mouse inputs only. So if you are downloading a largish file of the Internet, and you don't touch your keyboard or mouse for the period specified in the inactivity timeout, your modem will hangup during the transfer. Windows 95 modem drivers seem to have a lot to do with the reliability of a modem connection. We have seen users who have been plagued with problems upgrade to the latest specific driver for their modem and suddenly have all their problems fixed.