Error message

User warning: The following module is missing from the file system: redirect. For information about how to fix this, see the documentation page. in _drupal_trigger_error_with_delayed_logging() (line 1143 of /var/www/html/includes/bootstrap.inc).

CTCSS

This page has been moved to the wiki here.

Please use the wiki, as this information here is out of date.

Continuously Tone Coded Squelch System (CTCSS) is a subduable tone (below 300 Hz) which controls access to radio systems. CTCSS has other names including PL (Private Line) and CG (Channel Guard). We use CTCSS rather than PL or CG throughout this document. For more information see http://en.wikipedia.org/wiki/Continuous_Tone-Coded_Squelch_System.