USER MANUAL [1.4]
Page 47
3. CONNECTION OF THE SPEAKERPHONE COMMUNICATION
WITH THE DRIVER
The output volume of the device can be adjusted when the configuring the device.
The connection diagram of the microphone and speaker is shown in Figure 9.
Figure 9 – Diagram of connecting the microphone and speaker
An external electret microphone with a balanced output should be used as a microphone for
balanced connection. The power for the microphone is generated by a GSM modem.
The sensitivity and the volume level of the microphone can be adjusted when configuring the
device – see the section ‘Phone numbers’.
If it is necessary to produce a more powerful (loud) sound, an external amplifier and a
loudspeaker corresponding to its power output should be used.
