Outback HF Radiophone 8-1
8. Using tone call
The tone call facility allows stations within a network to call
(tone encode–TE) other stations using the transmission of tones.
The following only applies where your Radiophone is required
to operate into a private network using the transmission of tones
for calling. The tone calling facility used for the RFDS and OTC
(Telstra) services has already been programmed into the
Radiophone for operation with the appropriate service
channels—no further action is required by the user.
Tone calls use two tones (High and Low) transmitted
simultaneously to call another station. The tones used must be
identical for both the transmitting and receiving transceivers.
The tones fit into two frequency bands, each with a High and
Low tone, either 440 Hz or 360 Hz apart. Each of these bands
must lie within the frequency range 850 Hz and 1500 Hz.
The RFDS uses the 440 Hz frequency band, an example for this
type of call would be 880 Hz and 1320 Hz. Private
communications use the 360 Hz frequency band, a typical
example for this type of call would be 880 Hz and 1240 Hz.
To transmit a tone call, tone call must be enabled on the selected
channel.
The Radiophone cannot receive and decode tone calls
Selective call and tone call cannot be enabled on the same
channel.
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