Chapter 7: AT Commands and Registers
7-8 CSMIM-T1 Hardware Installation Guide
R (Dial a Number in Answer Mode) Must follow the last character
in the dial string. Causes the modem to dial in answer mode when
calling an originate-only modem. For example:
ATD 5551234R <Enter>.
T (Tone Dial) Placed anywhere in the dial string, causes the modem
to tone dial. For example: ATD T12345 <Enter>.
W (Wait for Dial Tone Before Dialing) Inserted between digits in
a dial string, causes the modem to wait for a second dial tone up
to the register S7 time delay before dialing the number. If the
modem receives a dial tone before the register S7 delay expires, it
continues dialing. If it does not receive a dial tone, it displays NO
DIALTONE and hangs up. For example: ATD 5551234 W
5556789 <Enter>.
@ (Wait for Quiet Answer Before Dialing) Inserted between
characters in a dial string, causes the modem to wait for the
register S7 time delay, for at least one ring followed by five
seconds of silence, before acting on the next character in the dial
string. If the modem does not detect this sequence, it displays NO
ANSWER and hangs up. Use this modifier when the system you
are calling does not provide a dial tone. For example: ATD
5551234 @ 43210 <Enter>.
NOTE Tone dial is the default setting. The last P or T dial modifier
used remains in effect until you either enter a dial command
with a different P or T modifier or reset the modem. You can
combine P and T dial modifiers within a dial string. For
example, pulse dial a local telephone number and tone dial an
access code and phone number; type: ATD P5551234 T33
56789 <Enter>
NOTE (Pause During Dial) Inserted in a dial string, causes the
modem to pause for the register S8 delay before dialing the
next digit. The default is 2 seconds. Use more than one comma
for a longer pause. For example, when you need to dial “9” and
pause for another dial tone before dialing an outside line:
ATD 9,,5551234 <Enter>.