Typically on LTR systems, each of these controllers periodically sends out a data burst (approximately every 10 seconds on LTR Standard systems) so that the subscriber units know that the system is there. The idle data burst can be turned off if desired by the system operator.
On LTR systems, typically, each controller sends out a periodic data burst (about every 10 seconds on LTR Standard systems), allowing subscriber units to know the system is operational. This idle data burst can be disabled if needed by the system operator.