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Chapter 14. Troubleshooting Your Interne... > Troubleshooting Internet Problems wi... - Pg. 399

Troubleshooting Your Internet Connection 7. 399 Try reducing the Maximum Port Speed (computer-to-modem connection speed) setting in Mo- dem Properties to 19200. If this solves your problem, you need a new modem, or, if you have an external serial modem, a higher-quality serial port card. Identifying Modem Connectivity Problems Modems are much more reliable these days than they were in the 1980s and 1990s. Still, compat- ibility problems and trouble due to poor telephone line quality still occur from time to time. If your modem fails to make a connection, or disconnects by itself, here are a few things to look for: · If the ISP's modem answers but you don't establish a connection, your modem may be incom- patible; call your ISP for assistance. · If your modem disconnects and you are told that there was a problem with your username or password, try to connect again and check these entries carefully. If you try two or three times and still can't connect, contact your ISP for help. I've known them to disable accounts for various reasons, from non-payment to, well, no reason at all. · Create and view a log file of modem activity and look for error messages indicating a protocol negotiation error. Your ISP can assist with this as well. · If your modem makes screeching sounds for about 15 seconds and hangs up, your modem is probably incompatible with the equipment used at your ISP, and one of you needs to get an updated modem. Before you buy a new one, note that some modems can be updated via soft- ware. Check the manufacturer's Web site for information. · If your connection works but the modem disconnects after a certain amount of time, there are two possible causes. If your connection was sitting idle, you may have run into the Windows inactivity timer. View the dial-up connection's properties in Network Connections and select the