ModelC960Headset IntercomSystemOperation and Diagrams
1-2 E 3M 2000 May
Single-Lane Standard Communication System
This system provides standard communication
(talk/listen) for facilities that have one menu sign. It
consistsofone basestationandoneormoreheadsets
and battery chargers.
Dual-Lane Standard Communication System
This system provides standard communication
(talk/listen)forfacilities thathavetwomenu signs. It
consistsoftwo independentsystems-- onededicated
tomenusign 1and theother dedicated to menusign
2. The headsets are programmed to work with one
systemorthe otherandarelabeled accordingly (1 or
2).
Single-Lane Duplex Communication System
This system provides duplex communication
(simultaneous talk/listen) for facilities that have one
menusign. Itconsistsof onebase stationand oneor
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. Itconsists of two base stations andtwo
or more headsets and battery chargers.
Cross-Lane Communication System
This system provides duplex communication
(simultaneous talk/listen) for facilities that have two
menusigns. Itconsistsoftwoduplexsystems thatare
connected to a cross-lane module. The headsetsare
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
operatortotalk tocustomersatmenu sign1 ormenu
sign 2 or with other headset operators.
Duringpeakhours,thecross-lanemoduleisturnedoff
to separate the systems. Withthe cross-lanemodule
off, one system is dedicated to menu sign 1 and the
othertomenu sign2. Menusign1operators cantalk
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
radiosignalsto provideoneormore ofthefollowing
types of audio communication:
S Talk/listen communication
S Talk lock communication
S Page communication
S Page monitor communication
S Cross-lane talk/listen communication
Processing Vehicle Alert Signals
The Model C960 is compatible with all 3M vehicle
detectorsandthoseofmostothermanufacturers. 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 vehicleis presentat
the detector. Pulse detectors, such as air hoses,
provideonlyamomentarysignal—signallingvehicle
arrival with no indication of whether or not the
vehicle remains at the detector station.
S Ifapresence detectorisused,menu signaudiois
turnedoffautomaticallywhenthe vehicleleaves.
S If a pulse detector is used, menu sign audio is
silencedbypressingandreleasingaheadsetpage
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
untilthetalk switch[onanactive headset]ispressed.
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.
To Next Page
Loading...
Need help?
General
