Sepura SC20 series, Руководство пользователя

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Calls are all the same type and destination, allowing the network to decide
what type of call is made and the destination whenever an Alarm Call is
initiated).
When your call is modified you are alerted with specific visual and acoustic
alert indications, to make you aware that a new type of call is being
connected. The call continues as per any normal call of the new type, and the
icons and information elements displayed inform you about the type of the
ongoing call.
Once the call is established, the characteristics of the new call are the same as
those of any call of that type. For example, if the new call is half-duplex, you
need to press PTT before starting to speak, releasing the PTT allows other
parties to take the speech item, and the top microphone and half-duplex
loudspeakers are used.
Tip: When a radio is worn attached to your body, a half-duplex to full-
duplex call modification can be difficult to handle (since the latter is a
telephone-type call). To overcome this, your radio can treat the full-
duplex calls (resulting from a half-duplex call modification) as if they are
half-duplex calls, i.e. using PTT before speaking and releasing it to hear
the other party. (
Making individual phone calls (full-duplex mode) on page
65 .)
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SC20 series – 04/2016