Chapter 7: AT Commands and Registers

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>.

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>

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>.

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>.

@(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>.

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CSMIM-T1 Hardware Installation Guide

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Cabletron Systems CSMIM-T1 manual ATD 9,,5551234 Enter