MOD-10-1164
sepura
TETRA Terminals
Product Guide
October 28
th
2011
Page 30 of 36
Issue 5
© Sepura plc 2011
o
none to two VAC handsets
o
none to two VAC speaker microphones (which may be configured as fist
microphones)
Handset Based Console:
o
built-in handset
o
none to one hands-free kit
M
OBILE
/
G
ATEWAY
R
ADIO
A
UDIO
C
ONTROL
The Mobile/Gateway radio supports the concept of a single controlling audio accessory for a
call. The controlling audio accessory is the one in control of the call, and the only one on
which the microphone becomes active.
When a fist microphone or hands-free kit is used, the received audio is directed to the
loudspeaker connected to the mobile unit. When a handset is used, the received audio
is directed to the handset earpiece.
The controlling audio accessory is normally the Remote Microphone used in conjunction with
the Loudspeaker, i.e. the hands-
free kit or „Public‟ mode. If the user requires that a different
accessory should become the controlling accessory this may be achieved by pressing the
PTT key on that accessory or by taking that accessory off hook. If the new controlling
accessory has an earpiece then normally this is used for received audio instead of the
Loudspeaker („Private‟ mode).
When in „Private‟ mode the user can switch to „Public‟ mode by pressing the hands free soft
key if configured. Taking a handset off hook, or
using its PTT will return to „Private‟ mode.
While the controlling accessory is not the Remote Microphone, the user may switch to
another accessory by pressing the PTT key on that accessory. Taking that accessory off-hook
does not change the controlling accessory. This allows a second user to listen to received
audio on another accessory.
If the controlling accessory is placed on-hook this clears the call unless customised
differently. Other accessories can be put back on-hook without clearing the call in progress.
All earpiece audio is left on all the time in order that multiple users may listen to the received
audio.
The audio presentation for duplex calls depends on the capability of the controlling accessory.
With a duplex controlling accessory, duplex calls have a duplex presentation. With a half
duplex accessory, duplex calls are controlled using the PTT key.
