TM8100/TM8200 Service Manual TMAA02-02 DTMF Microphone 507
© Tait Electronics Limited November 2007
20 TMAA02-02 DTMF Microphone
The TMAA02-02 DTMF microphone plugs into the
microphone socket on the radio control head, and enables users
to make calls to a PABX or PSTN.
To make a call, enter the required number using the DTMF
keypad. The DTMF microphone generates audible DTMF tones
as the microphone keys are pressed. Press the PTT key and speak
clearly into the microphone then release the PTT key when you
have finished speaking.
The microphone button operates a hookswitch, which is closed
when the microphone is connected to the microphone clip and
open when the microphone is removed from the microphone clip.
The function of the hookswitch is determined by the radio
programming.
Note The TMAA02-02 DTMF microphone is not suitable for use with
PTT signalling. An example of PTT signalling is leading ANI.
20.1 Installation
Installing the
Microphone
Important The DTMF microphone grommet must be installed when-
ever the microphone is plugged into the microphone
socket. When installed, the grommet has two functions:
■ to prevent damage to the microphone socket when
there is movement of the microphone cord, and
■ to ensure that the control head is sealed against water,
dust and other environmental hazards.
1. Plug the DTMF microphone cord into the microphone socket on the
radio control head.
2. Slide the microphone grommet along the microphone cord and push
two adjacent corners of the grommet into the microphone socket cavity.
3. Squeeze the grommet and push the remaining corners into position.
4. Check that the grommet is seated correctly in the cavity.
PTT key
grommet
microphone
button not shown
(to rear of
microphone)
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