Disable call waiting

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The call waiting feature on your phone line can interrupt your online session. You can disable this feature every time you dial out by adding *70, in front of your number.  This code depends on the phone company, so make sure that it is the correct code for your telephone service provider especially if you're not in the USA. For example, if your current dial-up number is 555-1212 change it to *70,555-1212. *70 actually does the disabling of the call waiting feature, and the comma (,) afterwards, adds a delay to bypass the acknowledgment of the command. If your dialer won't interpret the commas in the phone number, try using just *70. To re-enable call waiting, dial *72.