Unitech PA950 - Manual (Page 151)

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Enter dialing commands manually: After you tap Connect, the Terminal
window opens. Commands you enter are displayed in the Terminal window.
When you are ready to connect, enter atdt followed by the number you
want dialed and then tap ENTER. Or, enter the number you want dialed
and then tap File > Continue (the Terminal window is closed).
To clear the buffer, tap Edit > Clear Buffer.
To return to the current Terminal session after switching to another
program, tap > Settings > System tab > Memory > Running
Programs tab. Tap Post-dial Terminal, and then tap Activate.
See Also: Connect to the Internet