DirecTV DIRECT TV Manual page 100

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example, should the dial-in number be preceded by your area code and should a
"1" precede the area code? In some areas, even local numbers must be dialed using
the area code. Press SELECT to return to the
6. To test your new dial-in number, select "Test Phone Connection Now." The
screen appears and a test phone call begins. When the call
completes, you should see the message "Test Succeeded!" Press SELECT to return
to . (If the phone call does not succeed, see "Phone
Troubleshooting," described on page 92.)
If the Receiver needs to dial a prefix to reach an outside line (for
example, the Receiver may need to dial "9" before it dials out), you can specify that
prefix on this screen. Use the number keys on the remote control to enter the prefix.
Press the PAUSE button after you have entered the prefix. This will insert a comma,
which will create a two second pause after the prefix is dialed. If you make a mistake,
use the BACK ( ) button to backspace.
If you have call waiting, you may choose to disable it while
the Receiver is making a call, so that the Receiver's phone call is not interrupted. If
you do not disable it, the Receiver may drop the call and allow the second call to ring
through, depending on your phone system. The Receiver will then try its call again
later. The most common code that phone companies use to disable call waiting is *70
(check with your phone company to find out how to disable call waiting in your area).
If you make a mistake, use the BACK button to backspace.
If your phone system uses pulse dialing, rather than tone dialing, you
can change the setting here.
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screen.