Clear-Com KB-702 Datasheet
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.
www.clearcom.com
Features:
• Selectable two-channel, full-duplex
operation
• Microprocessor-controlled logic and
switching
• Momentary/latching talk button
• Visual and audible call signaling,
with bright LED indicator
• Balanced local program input with
separate level control
• Internal controls for call signal tracking,
mic latch disable, and other functions
• Use with headset or handset, with
integral speaker for monitoring
• KB-702GM adds mic jack for gooseneck mic plus VOX circuitry
• Optional TW and 4-Wire daughter
boards provided additional flexibility
• Wall or console mount, or optional
V-Box for portable or desktop use
• LED buttons for talk, listen, call,
announce, link, all talk, or mic on.
Clear-Com Encore
TM
KB-702, KB-702GM, KB-701 Remote Speaker Stations
KB-702
The KB-701 remote speaker station connects to a single channel
of party-line intercom, and operates in half-duplex mode, similar
to a walkie-talkie. It features both an integral speaker and a flushmount electret microphone with mic limiter and a push-to-talk
button. The station may be programmed via two internal dip
switches to operate in four different modes, activated by other
stations within the intercom system. The different operating
modes are activated using the call signaling function of another
station, which allows for individual control of the speaker and
microphone.
Microprocessor-controlled logic and switching yields a featurerich intercom station in a compact format. An electronic
momentary-only talk button activates the talk function. Use
the talk button or the reomote control from another station to
activate the mic. A blue-colour LED indicates that the mic is
on, while an amber-color LED indicates the mic is off. Mic
sensitivity is selectable for either close or distant voice pickup.
The KB-701 offers both visual and audible call signaling, gaining
the attention of the user when not at the station. A red-color
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. This would allow paging at the station even if the
intercom volume control is turned down. In addition, the
intercom volume control of the KB-701 can be internally set so
that an incoming message would still be audible, even if the
control was turned all the way down.
The KB-701 may be wall or console
mounted in a standard 4-gang electrical
box, or may be mounted in the optional
V-Box for desktop, surface-mount, or
portable applications. It may be used with
the optional 4-wire or TW (two channels
on a single mic cable) daughter boards.
The station is powered by the intercom
line or by a local power supply when used
with the optional 4-Wire daughter board.
www.clearcom.com
Features:
• Single-channel, push-to-talk speaker
station
• Four different modes of operation,
internally programmable
• Microprocessor- controlled logic
and switching
• Flush-mounted internal microphone
• Visual and audible call signaling, with
bright LED indicator
• Balanced local program input with
separate level control
• Optional TW and 4-Wire daughter
boards provide additional flexibility
• Wall or console mount, or optional
V-Box for portable or desktop use
• LED buttons for talk, listen, call,
announce, link, all talk, or mic on.
Clear-Com Encore
TM
KB-701 Single-Channel Speaker Station
KB-701
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