Cable is an "Always On" connection. The modem connects to the NIC in the PC and is always connected. When the PC is on, you are connected to the net. If you want to disconnect, unplug the Ethernet cord from the NIC, or unplug the cable coax from the cable modem. You may get an alert or error message, but that's just the way it works. It's designed to be always connected.
MSIE and Outlook Exp
I have been on a dial-up modem for years and could easily tell if I was on line by looking for the little flashing modem or the two computers in the task bar. I have been on Road Runner cable for two days and can see no indication if I am on or off line.
Am I connected and on line just by turning on the computer? If so, how do I get off line short of turning off the modem which causes strange messages from the computer about finding another LAN or some such.