When your dial-up connection is disconnected, it may continue to show as connected for up to 2 minutes?

If you disconnect the phone line from an external modem, Netconfig immediately updates the status.

If you disconnect the phone line from an internal modem, Netconfig may take between 20 - 30 seconds to update the status.

If it takes longer, your modem driver is NOT informing Netconfig of the status change on a timely basis.