TM8100/TM8200 Accessories Manual TMAA02-02 DTMF Microphone 53© Tait Electronics Limited August 20055 TMAA02-02 DTMF MicrophoneThe TMAA02-02 DTMF microphone plugs into themicrophone socket on the radio control head, and enables usersto make calls to a PABX or PSTN.To make a call, enter the required number using the DTMF keypadand the DTMF microphone generates audible DTMF tones as themicrophone keys are pressed. Press the PTT key and speak clearlyinto the microphone then release the PTT key when you havefinished speaking.The microphone button operates a hookswitch, which is closedwhen the microphone is connected to the microphone clip and openwhen the microphone is removed from the microphone clip. Thefunction of the hookswitch is determined by the radio programming.5.1 InstallationInstalling theMicrophone Important The DTMF microphone grommet must be installed when-ever the microphone is plugged into the microphonesocket. When installed, the grommet has two functions: to prevent damage to the microphone socket whenthere 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 theradio control head.2. Slide the microphone grommet along the microphone cord and pushtwo 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 keygrommetmicrophonebutton not shown(to rear ofmicrophone)Figure 5.1 Correct DTMF microphone grommet seatingmicrophonegrommetcontrol head