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If a Priority channel(s) is on the Scan list (or
programmed) the radio will scan in the following manner.
The Priority 1, Priority 2, and then the non-priority
channels will be scanned. When a carrier is detected,
and, if programmed, the correct Channel Guard is
decoded, the LCD will indicate the channel number.
Sampling of the Priority 1 and Priority 2 channels will
continue. The radio will switch to a priority channel if a
priority channel carrier is detected, while a non-priority
channel is being received.
If the PTT button is pressed when SCAN is on, the
radio can be programmed to transmit on the selected
channel or on the current receive SCAN channel.
TELEPHONE INTERCONNECT CALLS
The keypad on the DTMF radio's front panel allows
the operator to make telephone interconnect calls on
radio systems equipped with this option. Telephone
numbers may be manually dialed, or one (1) of three (3)
programmed numbers can be selected and dialed
automatically. Most systems require an "*" to be sent at
the beginning of a transmission to get a dial tone.
Others require a "#." After the dial tone is received, the
number is sent.
Communication takes place in a simplex mode. In
other words, you cannot talk and listen at the same time.
You must press and hold the PTT button each time you
wish to talk (transmit) and release it when you wish to
listen (receive).