ClearCom KB-702 2-Channel Select Flush Mount Speaker Station
The KB-702 remote speaker station permits the user to select
between two channels of party-line communications, with the ability
to talk and/or listen on the selected channel. The user can listen via
the integral speaker, or may use a headset or telephone-style handset
- and can talk via a headset mic, a telephone handset, or a push-totalk
microphone.
The KB-702GM adds a gooseneck-mic connector and VOX circuitry,
for hands-free full-duplex communications without a headset.
A switch allows the user to choose between the optional GM-9 or
GM-18 microphone and the headset connector. The adjustablesensitivity,
close-in VOX feature automatically detects the user's voice
at the mic and dips the level of the integral speaker while increasing
the gain of the microphone, performing in the opposite manner when
listening. The potential for acoustic feedback is minimized while
permitting natural conversation levels and dynamics.
Microprocessor-controlled logic and switching yields a feature-rich
intercom station in a compact format. Electronic switching for the
talk button, blue-color LED (on), amber color LED (off), permits
momentary or latching operation. For call signaling, a bright LED
lights when a call is activated on a connected intercom channel.
A defeatable audible call signal, with level control, is also provided.
Separate level controls are provided for intercom level and for
balanced program input. A local program source may be fed to the
station, allowing the user to monitor that source while remaining in
contact on the intercom system. The balanced program input can
also be used in conjunction with the stage-announce output of a main
station to provide a paging interrupt, allowing paging at the KB station
even if the intercom volume control is turned down.
A set of option dip switches is located at the top of the circuit board.
Switches are provided for mic-latch disable (momentary-only talk),
long-line operation, channel selection, call signal tracking, and audible
call signaling.
These versatile stations may be wall or
console mounted in a standard U.S. 4-gang
electrical box, or may be mounted in the
optional V-Box for desktop, surface-mount,
or portable applications.
Either of the stations may be used with the
optional 4-wire or TW (two channels on a
single mic cable) daughter boards. On the
TW board, the stations become plug in
compatible with a Clear Com TW system.
The 4-wire board creates separate send and
receive circuits, so that the station may be
attached to fiber-optic lines or other audio
routing systems with 4-wire connections.
The stations are powered by the intercom
line or by a local power supply when used
with the optional 4-wire daughter board.
