AA31 ICS Mode Controller
SM10 Installation and Operation Manual
April 14, 2012 Rev: 5.00
Page 3-1
ENG-FORM: 806-0100.DOTX
CONFIDENTIAL AND PROPRIETARY TO ANODYNE ELECTRONICS MANUFACTURING CORP.
Section 3.0 Operation
3.1 Introduction
Information in this section consists of the functional and operational procedures for the AA31 ICS Mode
Controller.
3.2 General
The AA31 ICS Mode Controller provides a convenient, centralized method of organizing the aircraft audio
system into multiple intercom circuits for independent or common operation. This function is especially
valuable for EMS and law enforcement applications, where several independent operations occur within
the aircraft that often require isolation from each other, while retaining the ability to share common
communication.
3.3 Operation
Specifics
Intercom Function Selector
3.3.1 Intercom
Function
Selector
The Intercom Function selector is a rotary 4-
position switch that is used to select ‘talk groups’ for intercom
(ICS).
Selecting ALL ISO isolates all ICS positions from each other. The ICS tie lines of the Pilot Audio Controller, Co-
pilot Audio Controller, and the Rear Audio Controller(s) are not connected, but the ICS tie lines of both Rear
Audio Controllers remain connected together.
Selecting PILOT ISO isolates the pilot from all other positions. The Pilot Audio Controller is not connected
to the ICS tie line of any other Audio Controller, but the ICS tie line of the Co-pilot Audio Controller is
connected to the ICS tie line of the Rear Audio Controller(s).
REAR CALL LEFT
ISO
ALL COMMON
REAR CALL RIGHT
Annunciator Annunciator
Annunciator
Annunciator
