Midland 445 BT Manual Del Usuario página 5

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Talk connection on/off
There are two possible methods to start the Bluetooth communication link. The method depends on which "protocol" will be
used in the headset software.
Press Bluetooth button at 445 BT shortly (= less than 1 second). After appr. 1 second, the communication link is
established and the LED will change to green continuously. You can now listen and / or talk.
or
Press the Talk / Start button at the Bluetooth headset. The LED at the 445 BT will light green as well.
Notes:
Which of both possibilities will work, depends on the headset and the kind of Bluetooth protocol applied by the headset
software. The so called Headset Protocol will allow both methods, while the Handsfree Protocol allows in some
cases only the Bluetooth button at the 445 BT side to start and stop the communication link. For example the BMW
Bluetooth helmet system is using the Handsfree Protocol, so only the button at the 445 BT should be used.
Bluetooth connections to 2-way radios are different from cellular phone connections. In cellular phone systems the
Bluetooth system + headset will fall back into standby mode after a phone call has been terminated. This will save
power consumption.
In 2 way radio communications, where we do not have ringing or dialing situations, the headset + Bluetooth link must
be always fully active. Otherwise You would not hear short conversations on the selected channel! This is the technical
reason why the operating time of a BT headset is shorter in 2-way communication compared to the long standby
periods of GSM connections.
In 2 way radio systems the headset remains permanently connected with the radio and cannot be connected with
any other Bluetooth audio source at the same time. However, our MIDLAND BT Intercom system is able to keep a
radio connection between driver and 455 BT and to the passenger at the same time, because the BT Intercom is
using separate chipsets systems for the Bluetooth and the passenger communication paths.
Automatic switching between Standard Microphone / Headsets and Bluetooth
internal or external wired headset, as described in the standard user manual. The BT module is off or in StandBy (LED
is flashing green from time to time). If BT connection is activated („Talk" position) the LED will be continuously green.
Now the internal microphone is switched off and the radio uses only the BT headset. The internal PTT button or an
external button, connected to the mic socket, works now for the Bluetooth connection.
®:
Normally the radio works with

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