Motorola TMR 2 Посібник користувача - Сторінка 10
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The ITAC channels are to be used primarily for coordination activity
between diff erent agencies in a mutual aid situation, or emergency
activities of a single agency. Incidents requiring multi-agency participation
will be coordinated over these channels by the agency controlling the
incident.
Some communications may be best managed using simplex frequencies
because they:
•
Remove traffi c from the TMRS repeaters, can be used in poor system
coverage areas, and allows TMR for long range communications.
•
Simplex frequencies have limited range and provide no contact with
dispatch.
•
There are no tones (such as the "go ahead" or "busy tone") on the
simplex channels.
•
If you wish to use a simplex channel in a particular area, switch to
that simplex channel and listen to see if anyone is actively on the
channel.
•
If the channel is free, voice call "Any station using this
channel? Over"
•
If no one answers, you are free to use the channel.
•
If you do receive a reply stating that the channel is in use,
switch to another simplex channel.
•
Simplex is direct radio-to-radio communication.
•
These channels provide another interoperable tool for
communications.
Radio/System Tones
The TMRS radios generate various tones to indicate diff erent things to the
user. These tones are important because you will need to react to each of
them in diff erent ways:
A fast, high pitched three-note tone (triple chirp) that tells you
Go-Ahead:
the radio is connected to the system and you can 'go-ahead' and talk. If you
don't hear this tone you are talking to yourself.
This is like a fast telephone busy signal — a mid-range beep
System Busy:
tone about every half-second. This signal means all the repeaters on the
site you are connected with are currently busy with other radio traffi c. Wait
a few seconds and the radio will give you the 'Go-Ahead' tone.
A low pitched repeating bonk sound that means the radio has
System Bonk:
lost contact with the system. This is caused by poor coverage or loose or
damaged antenna.
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