• Call signaling is accomplished using an inaudible
(20kHz) signal to activate a call indicator LED.
• Remote talk-off (mic kill) active, unattended remote
station microphones may be deactivated by
momentarily injecting an inaudible (24 kHz) signal into
the corresponding intercom line. The MCE-325 can
send and receive talk-off (mic kill) signals.
• VOX circuit, the MCE-325 may be programmed for
voice activation of the microphone.
• Simple IFB program audio assigned to a channel is
interrupted during talk.
• The microphone preamplifier circuit contains a limiter,
which helps to equalize voice levels.
• Retains programming even when power is shut off.
• External devices, such as 2-way radios, speaker mute
relays, or paging systems may be activated through
key outputs at the auxiliary connector on the rear
panel. The key outputs may also be used to expand
the simple IFB function, allowing any one (1) of a
number of MCE-325 stations to interrupt the program
source and talk on the line.
Features