S-COM 7K, Manual, Page: 192 / 400

7K
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Chapter 11
11-10
Enable/Disable DTMF Long Tones
Turns ON or OFF the controller’s ability to execute macros based
on reception of long DTMF characters.
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Enter one digit, 0 for OFF (disabled), 1 for ON (enabled).
Command Form:
Command Form Data Digit
Enable/Disable DTMF Long Tones (PW) 63 68 x * 0 = OFF (disabled)
1 = ON (enabled)
Acknowledgment: Sends OK
Errors:
Error Meaning
? err 1 wrong number of digits entered
? err 2 illegal digit entered
Default Condition: DTMF Long Tone feature is OFF (disabled)
Examples:
A Long Tone is a DTMF digit sent by a user that lasts continuously for 3.0
seconds or longer. The controller can execute a different macro for each of the
16 possible long DTMF characters. This system is compatible with the ARRL’s
nationwide “LiTZ” (Long- Tone Zero) program, which asks amateurs to monitor
for a 3-second DTMF “0” sent by a user who is in an emergency situation.
The macro is executed on the trailing edge of the DTMF character. Since the
long tone is treated similar to a logic input by the controller, it becomes a stand-
alone signal instead of a character for the command buffer. There must not be
any other characters in the command buffer when the long tone is received.
The long tone character itself will not be stored into the command buffer.
After you have enabled this feature, see the Select DTMF Long Tone Macros
command on page 11-11 for information on assigning the appropriate macros
to the long DTMF characters.