The PPP connection to the Internet is not made if a PPP server does not reply to LCP Echo packets.
This document applies to Mac OS X 10.1 or later.
Mac OS X 10.1
1. Open the Internet Connect applications.
2. Click Advanced Options.
3. Deselect "Send LCP echo packet".
Mac OS X 10.2, 10.3 or later
1. Choose Apple menu > System Preferences.
2. Choose View > Network.
3. Choose Internal Modem from the Show pop-up menu.
4. Click the PPP tab.
5. Click PPP Options.
6. Deselect "Send PPP echo packets".