Honeywell KMA28 operation manual Hook Switches

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Bendix/King

KMA28

Audio Amplifier/Intercom/Marker Beacon Receiver

connected to pin W of the J3 connector. On the AirCell interface diagram these are listed as data/fax lines, but they are used for voice interface in this case.

Use a 2-conductor with shield cable, and connect the shield to Pin M of the J3.

If interface is desired with another type of wireless telecommunications unit, the aircraft owner can purchase an after-market interface cable. By Federal Communications Com- mission (FCC) regulations, these can only be used on the ground in the United States.

Unauthorized use of cellular telephone devices in aircraft is subject to FCC enforcement action, which may include a $10,000 fine per incident. Honeywell, Inc. does not endorse using unapproved cellular telephone equipment in flight, and takes no responsibility for the user’s action.

2.8.1 Hook Switches

While the mic selector acts as the hook switch for the pilot, additional hook switches must be installed to have full access to the cellphone system. The copilot hook switch is a SPST switch that connects pin L of J2 on the KMA 28 to ground to place the copilot on the cellphone.

KMA 28 J2, pin M is the passenger hook switch. Install a SPST switch in a location adja- cent to each passenger headset where cellphone use is desired. When pin M is connected to ground through any switch, the passenger microphones are all on the cellphone system.

The wireless communication “tel” system utilizes an intercom loop. Therefore, any time the cellphone is in use from the pilot or copilot side, pilot and copilot will lose intercom capability. In the ALL mode, when the passengers’ activate the cell phone, the pilots will have intercom, and continue to hear and transmit over the avionics normally. However the passengers will not have intercom, because they are on the telephone.

To prevent unwanted distractions, only the pilot and copilot will hear an incoming call ring signal. They can then decide to allow a passenger to activate the hook switch and use the telephone.

If the pilot has selected “TEL” mode, the passengers cannot access the telephone in the “CREW” intercom mode, but they will hear the call.

006-10565-0000

Page 2-8

Rev. 0, Sept. 2000

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Contents BENDIX/KING Table of Contents Cellular Interface Checkout Section I General Information IntroductionScope Equipment DescriptionApproval Basis TSO ApprovalSpecifications TSO ComplianceIntercom Specifications Equipment SuppliedEquipment Required but not Supplied License RequirementsSection II Installation Equipment Installation ProceduresGeneral Information Unpacking and Preliminary InspectionMounting Rack Installation Connector AssemblyCable Harness Wiring NoiseExisting KMA-24 Installation Existing PS Engineering PMA6000 installationsPower Communications Push-to-TalkSwap Mode Unswitched inputsIntercom wiring BacklightingCom 3 Audio Public Address functionMarker Installation Communications Antenna Installation Notes AdjustmentsWireless telecommunications interface Hook Switches KMA 28 Pin Assignments Unit Installation Post Installation CheckoutOperational Checkout Marker Checkout Receiver SensitivityCellular Interface Checkout Final InspectionSection III KMA28 Operation Audio SelectorKey click Speaker AmplifierPublic Address PA Function Power Switch /Emergency EMG OperationMicrophone Selector Swap Mode Switch from Com 1 to Com 2 remotely Split ModeSplit Mode ICS Telephone ModeIntercom System IntelliVox VOX-SquelchMono headsets in Stereo Installation Volume ControlIntercom Modes Soft Mute and Soft Mute inhibit Marker Beacon Operation Telephone Operation if equipped with approved systemWill lose intercom capability when it is in use Connector viewed from the rear Appendix a Installation DrawingsTray Dimensions in inches Top View Tray Assembly Drawing Appendix B Bottom Connector Interconnect Bottom Connector, J1Appendix C Top Connector Interconnect J2 TOP ConnectorInstructions for Continuing Airworthiness Instructions for FAA FormConditions Section Conducted Tests