Browse Prior Art Database

ACCESSORY ATTACHMENT FOR A STARTAC MOBILE TELEPHONE

IP.com Disclosure Number: IPCOM000009083D
Original Publication Date: 1999-Jun-01
Included in the Prior Art Database: 2002-Aug-07
Document File: 2 page(s) / 78K

Publishing Venue

Motorola

Related People

Jeff McTaggart: AUTHOR

Abstract

Previous cellular phone digital encryption designs by Motorola's Information Security Division used the MicroTAC Elite@ and required a mechanical attachment to house the additional cir- cuitry. As these older versions of phones are removed from the market to be replaced with StarTA@ models new accessory attachments need to be provided.

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0 MOTOROLA

Technical Developmenis

ACCESSORY ATTACHMENT FOR A

STARTA@ MOBILE TELEPHONE

by Jeff McTaggart

BACKGROUND

  Previous cellular phone digital encryption designs by Motorola's Information Security Division used the MicroTAC Elite@ and required a mechanical attachment to house the additional cir- cuitry. As these older versions of phones are removed from the market to be replaced with StarTA@ models new accessory attachments need to be provided.

SOLUTION

  The "CipherStar" shown in Figure 1 allows a mechanical and electrical attachment to the StarTA@ cellular telephone. The conception of the CipherStar's was to attach an encryption device to the body of the cellular phone, but it could be used with any accessory to the StarTAC@.

  The CipherStar is comprised of an internal microphone and speaker, a pivoting butt plug con- nector which provides both electrical connection and lateral support for the phone, and a latch in the center of the housing to lock the phone into place. Semi-rigid rubber stubs protruding from the side of the device hold the top portion of the open StarTA@ in place. Power can be passed from the phone to the accessory through the butt plug, or another battery can be attached to power contacts on the back of the accessory, taking advantage of the StarTAC's@ ability to blend power from two differ- ent batteries.

  This device is a single rigid form factor set at the same angle as the opened two piece llip phone. Connection is accomplished in two mov...