Product Guide

MOD-10-1164

sepura

TETRA Terminals

Product Guide

October 28

2011

Page 30 of 36

Issue 5

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

MOBILE / GATEWAY RADIO AUDIO CONTROL

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.