Browse Prior Art Database

VERIFICATION AND IDENTIFICATION OF ACCESSORIES FOR USE WITH RADIOS

IP.com Disclosure Number: IPCOM000007926D
Original Publication Date: 1996-Nov-01
Included in the Prior Art Database: 2002-May-06
Document File: 2 page(s) / 87K

Publishing Venue

Motorola

Related People

Robert B. End: AUTHOR [+2]

Abstract

Platform radios (portables) may have a common accessory interface but not all accessories may be compatible with all radio variants. For example, Intrinsically Safe (IS) radios may have only a small portfolio of accessory products which are permitted to be used. These accessories must be appropriately labelled to indicate their validity but, apart from this, there is no linther verification oftheir suitability for purpose.

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MO7VROLA Technical Developments

VERIFICATION AND IDENTIFICATION OF ACCESSORIES FOR USE WITH RADIOS

by Robert B. End and Christopher W. Wright

  Platform radios (portables) may have a common accessory interface but not all accessories may be compatible with all radio variants. For example, Intrinsically Safe (IS) radios may have only a small portfolio of accessory products which are permitted to be used. These accessories must be appropriately labelled to indicate their validity but, apart from this, there is no linther verification oftheir suitability for purpose.

  Labelling is the only known method ofidentify- ing suitable, approved accessories. However, non- approved accessories could be connected, knowingly or unknowingly, by a user and the equipment would function but would be unapproved and possibly unsafe. SABER (TM) uses voltage to indicate to the radio that an accessory is connected, and the radio then configures the audio and antenna paths accord- ingly. JEDI (TM) uses binary data from two lines to determine the audio configuration, internal or exter- nal, but the antenna is switched mechanically. How- ever, there is no attempt, by either SABER or JEDI, to determine the validity ofa connected accessory.

labelled, a condition of approval, but, additionally, would be electronically coded, by means of a resis- tor, for example, see Figure 1. Part of the self check routine of the IS radio would be a check for the presence ofan external accessory which would then be ide...