3M C860 User Manual

ModelC960Headset IntercomSystemOperation and Diagrams
1-4 E 3M 2000 May
Menu Sign to Headset
Whenthecustomer atthemenusign speaks,audiois
detectedbyamicrophoneandsentthroughwiretothe
transmitter and the monitor amplifier in the base
station.
Thetransmittertransmits themicrophoneaudiotoall
headset receivers. The monitor amplifier routes the
samemicrophoneaudio throughwireto theoptional
monitor speaker.
n Note
Personnelwearingheadsets thatareset tomonitor
only page communications will not hear talk
communications. If the headsets is in the Page
Monitor Mode, the “talk” audio output to the
headset speaker is muted.
Talk Lock Mode
Thetalklockmodeisusedtooperate“handsfree.” In
this mode, the headset automatically switches from
standby to talk/listen when a customeris detectedat
the menu sign. The headset automatically switches
back tostandby whenthe customerleaves themenu
sign. Thismodeisonlyavailablewithduplexsystem
configurations.
Page Mode
When the headset page button is pressed, system
operationisidentical totalkoperationexceptfor two
things:
S The talk control tone is not broadcast, so the
menu sign amplifier is not turned on, muting
menu sign audio.
S A page control tone is sent from the headset,
turning on the base station transmitter. The
transmitterrebroadcaststhis tone toturn ONany
headsetsthatare inthepagemonitor mode. Any
audio detected by the headset microphone is
transmitted to the base station where it is
received,transmittedtootherheadsetsandsentto
the monitor speaker amplifier.
Page Monitor Mode
The page monitor mode allows headset operatorsto
hearonlypage communication. Inthe pagemonitor
mode,talkaudiooutput totheheadsetismuted.Only
internal page communication is heard because the
headsettransmitteristurnedONonlywhenitreceives
a page control tone. Talk transmissions from other
headsets or audio from themenu signare notheard.
Cross-Lane Talk/Listen Mode
Thecross-lanetalk/listen modeis available only ina
dual-lane duplex cross-lane system. The cross-lane
moduleinthissystemenablesthemenu signoperator
to selectively communicate (talk and listen) to
customers in either lane 1 or lane 2.
WiththeT1 (TalkLane1)switchpressed,theheadset
transmitter/receiver switches to the lane 1 channel
frequencies,enablingthe lane1basestationandlane
1 communications.
WiththeT2 (TalkLane2)switchpressed,theheadset
transmitter/receiver switches to the lane 2 channel
frequencies,enablingthe lane2basestationandlane
2 communications.
Monitor Amplifier and Speaker
A one-watt, single-ended monitor amplifier in the
base station powers [an optional] speaker which is
capable of reproducing the following signals:
S Talkaudio(communicationstothemenuspeaker)
S Listen audio (communication from the menu
speaker)
S Page audio (internal store communications)
S Vehicle alert tone
Separate volume controls adjust the level of each
signal to achieve the desired signal balance. In
addition, there is a master volume control which
adjusts the overall volume of the monitor speaker.
Headset Components
n Note
The receiver/transmitter and logic circuitry
contained in the C960 headset housing is both
proprietary and non-field repairable.
The headset assembly has several field-replaceable
components. These components are detailed in
Section 3 of this manual (Replacement Parts and
Service).
The major components are as follows:

3M C860 Specifications

General

Brand	3M
Model	C860
Category	Intercom System
Language	English