DC voltages are derived from a master station or a separate A special kit is available for mounting the PS 230 power supply, via the intercom connection cables. in a 19" rack, taking 2U of rack space.
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The buzzer is activated if a CALL button speaker and gooseneck mic are now of the PS 230 is pushed (or a CALL button of any automatically disabled) and speak into the other station on a channel to which the PS 230 is...
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