Chapter 3 - AT Commands

$

Call Card Tone Detect

 

Use the $ command to dial services that require you to enter your call card number after a

 

tone. A $ character in the dialing string causes the modem to pause and wait for an AT&T

 

call card “bong” or a 1600 Hz tone (prevalent in the U.K.). When the modem detects the

 

tone, it processes the rest of the dialing string. If it does not detect a tone within the time set

 

by register S7 (a 45-second default), the modem aborts with a NO CARRIER message.

 

Pressing any key also aborts the $ command.

 

In the following example, the $ command is placed between an access/phone number and

 

the caller’s credit card number:

 

ATDT1028806127853500$123456789

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Multi-Tech Systems MT2834MR6 manual Call Card Tone Detect, ATDT1028806127853500 $123456789