3M C960, Информация о сервисе

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Model C960 Headset Intercom System
Operation and Diagrams
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3M 2000 May
Single-Lane Standard Communication System
This system provides standard communication
(talk/listen) for facilities that have one menu sign. It
consists of one base station and one or more headsets
and battery chargers.
Dual-Lane Standard Communication System
This system provides standard communication
(talk/listen) for facilities that have two menu signs. It
consists of two independent systems -- one dedicated
to menu sign 1 and the other dedicated to menu sign
2. The headsets are programmed to work with one
system or the other and are labeled accordingly (1 or
2).
Single-Lane Duplex Communication System
This system provides duplex communication
(simultaneous talk/listen) for facilities that have one
menu sign. It consists of one base station and one or
more headsets and battery chargers.
Dual-Lane Duplex Communication System
This system provides duplex communication
(simultaneous talk/listen) for facilities that have two
menu signs. It consists of two base stations and two
or more headsets and battery chargers.
Cross-Lane Communication System
This system provides duplex communication
(simultaneous talk/listen) for facilities that have two
menu signs. It consists of two duplex systems that are
connected to a cross-lane module. The headsets are
programmed for either lane 1 or lane 2.
During off-peak hours, the cross-lane module is
turned on to link the two systems and enable one
operator to talk to customers at menu sign 1 or menu
sign 2 or with other headset operators.
During peakhours, thecross-lane moduleis turnedoff
to separate the systems. With the cross-lane module
off, one system is dedicated to menu sign 1 and the
other to menu sign 2. Menu sign 1 operators can talk
to customers at menu sign 1 or with other headset
operators. Menu sign 2 operators can talk to
customers at menu sign 2 or with other headset
operators.
Operating Theory
The 3M Model C960 Headset Intercom System has
two basic functions. First, it processes vehicle alert
signals that are supplied by a hard-wired vehicle
detection system. Second, it transmits and receives
radio signals to provide one or more of the following
types of audio communication:
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Talk/listen communication
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Talk lock communication
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Page communication
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Page monitor communication
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Cross-lane talk/listen communication
Processing Vehicle Alert Signals
The Model C960 is compatible with all 3M vehicle
detectors and those of most other manufacturers. The
vehicle alert system provides a signal to the base
station to indicate a customer is present at the menu
sign.
There are two types of vehicle detectors.
Presence
detectors (such as magnetic loops or SODAR)
provide a signal for as long as a vehicle is present at
the detector. Pulse detectors , such as air hoses,
provide only a momentary signal—signalling vehicle
arrival with no indication of whether or not the
vehicle remains at the detector station.
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If a presence detector is used, menu sign audio is
turned off automatically when the vehicle leaves.
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If a pulse detector is used, menu sign audio is
silenced by pressing and releasing a headset page
switch.
When a vehicle detection signal is presented to the
base station, the base station broadcasts a repeating
alert tone to all headsets. The alert tone continues
until the talk switch [on an active headset] is pressed.
Transmitting and Receiving
The transmitting and receiving functions are
accomplished by two separate sets of radio
transmitters and receivers. One set is located in the
headset and the other in the base station.