Monitor TAD-214-W300, Installation Instructions & Operating Manual

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11.13. - Microphone (optional)
11.13.1. - If the microphone option has been purchased and plugged into
the connector marked MIC on the PCB (see Wiring), it is possible to listen
in to the unit. Phone the unit, (it will auto answer after 3 rings) and you
can listen in to whatever the microphone picks up. If a speaker is also
fitted (see below) a two way communication can take place.
11.14. - Speaker (optional)
11.14.1. - If a Speaker has been connected to the system (see
‘ Wiring ’ ) it is
possible to speak to the unit. Phone the unit, (it will auto answer after 3
rings) and you can pass instructions/information to those in ear shot of the
speaker. If a microphone is also fitted (see above) a two way
communication can take place.
N.B.
– as the unit does not have a keypad, dialling out from the unit is not
possible.