InfoConnect for Airlines VBA Guide
HangUp Function
Hangs up the modem by sending the Hayes "+++" command to get the modem's attention, followed by the "ATH" hangup command.
This method does not guarantee that the modem is actually hung up. No error is returned if the method fails for any reason. After the modem is hung up, the port remains open; use the Disconnect method to close the port. Valid only if InfoConnect is set to use the old modem dialer (UseModemDialerV5 = true).
See Also