S-COM 7K, Manual, Page: 226 / 400

7K
•
Chapter 16
16-8
Select From-Start-of-Transmission Timer
Allows controller to “disconnect” the DTMF decoder from a receiver
if it appears no DTMF command will be entered during a
transmission.
•
The DTMF decoder is free to find another source of DTMF commands if the
current user does not enter a digit within 5 seconds from start of
transmission (See the
Select DTMF Priority/Scan command on page 11-3).
•
Reduces DTMF “falsing”, since the DTMF decoder only listens during the
beginning of the transmission.
•
Enter one digit, 0 for OFF (disabled), 1 for ON (enabled).
Command Form:
Command Form Data Digit
Enable/Disable From-Start-of-Transmission
Timer for RX1 (PW) 63 64 x * 0 = OFF (disabled)
1 = ON (enabled)
Enable/Disable From-Start-of-Transmission
Timer for RX2 (PW) 63 65 x * 0 = OFF (disabled)
1 = ON (enabled)
Enable/Disable From-Start-of-Transmission
Timer for RX3 PW) 63 66 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: From-Start-of-Transmission Timer is OFF (disabled) for all
receivers.
Examples:
If this feature is disabled, the receiver will feed the DTMF decoder for the
duration of the transmission (subject to its priority. (See the
Select DTMF
Priority/Scan command on page 11-3).
If this feature is enabled, the receiver will feed the DTMF decoder for the first 5
seconds of the transmission (subject to its priority). If a user wishes to enter a
command and has already transmitted more than 5 seconds, he must unkey
and re-key before entering the command. Once a DTMF digit is entered, the
receiver will continue to feed the DTMF decoder for the remainder of the
transmission.