Apple Express Fax/Modem - Manual (Page 126)

3 Select Direct AT Commands in Modem Settings, and then click OK.
4 Choose Open Connection from the Session menu.
This is equivalent to lifting the telephone off the receiver.
5 Enter the command string AT&Q5DT2125556767 on your keyboard, then press
Return.
The modem will dial the number and make the connection. The messages
displayed on your screen will be similar to the following:
6 To hang up:
m enter +++ to go to command state
m type ATH
m and then press Return.
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