Flash On-Hook, @ Quiet Answer | Multi Tech Equipment ISIHI-2S

Chapter 4—MODEM AT Commands, S-Registers, Result Codes

;Return to Command Mode After Dialing

Enter a semicolon (;) as the last character of a dialing command to cause the modem to return to command mode immediately after executing the command instead of waiting for a carrier signal and going online.

For example, type ATDT5551212; to tone-dial the number and immediately go back into command mode. The semicolon is useful when modem data transfer is not desired, as in voice communications, or in applications using touch tones as a data entry method, such as bank-by-phone.

!Flash On-Hook

Some switchboard systems react to a momentary on-hook condition. Insert an exclamation mark into the dialing command to cause the modem to “flash” on-hook for half a second, just as if you had pressed the switch hook on a telephone set for half a second. (With U.K. models, the exclamation mark causes the modem to flash on-hook for 90 milliseconds.)

For example, to flash on-hook to transfer to extension 5678 after dialing the number 555- 1234, type ATDT5551234,,!5678. The commas cause a 4-second pause.

$	Detect Call Card Tone
	Use the $ command to dial services that require you to enter your call card number after
	a tone. The $ character in the dialing string causes the modem to pause and wait for an
	AT&T call card bong or a 1600 Hz tone. When the modem detects the tone, it processes
	the rest of the dialing string. If it does not detect the tone within the time set in register
	S7, the modem stops processing the dial string with a NO CARRIER message. Pressing
	any key also terminates the $ command.

@Quiet Answer

Use the @ command to access a system that does not provide a dial tone. The @ command causes the modem to wait before processing the next character in the dialing string. The wait is for one or more rings back followed by five seconds of silence.

For example, ATDT5551212@6313550 causes the modem to dial the first number (555- 1212), then wait for the time specified in register S7 for at least one ringback and five seconds of silence. If the modem detects a busy signal, it hangs up and generates a BUSY result code. If it does not detect five seconds of silence, it hangs up and generates a NO ANSWER result code. If it does detect five seconds of silence, it dials the second number (631-3550).

^Disable Data Calling Tone Transmission

Use the ^ command to disable the transmission of data calling tones. In the following example, the ^ command is used to tone dial 555-1212 and suppress data calling tone transmission. ATDT^5551212

Modem

MultiModemISI Hybrid Series, ISIHI-2S

ISIHI-2S specifications

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Multi Tech Equipment ISIHI-2S Return to Command Mode After Dialing, Flash On-Hook, @ Quiet Answer

Models: ISIHI-2S