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Browse Prior Art Database

CARTRIDGE SLOT EXPANSION OPTIONS FOR PAGERS

IP.com Disclosure Number: IPCOM000006825D
Original Publication Date: 1993-Jun-01
Included in the Prior Art Database: 2002-Feb-05
Document File: 2 page(s) / 111K

Publishing Venue

Motorola

Related People

John M. Burgan: AUTHOR

Abstract

In addition to a iadio receiver, a pager contains a general purpose microprocessor, memory, display and keyboard. This combination of circuitry is capable of doing many general purpose functions in addition to receiving pages. Also, many paging related features (such as escalerts, auto on/off, alarms) are being left out of some models due to limited memory size or cost con- straints. Since there are many specialty options that could be put into a pager that are not of general interest to all people, I propose adding a plug in expansion slot to a pager that would allow the user to purchase and install additional options that suit his personal needs.

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MOTOROLA INC. Technical Developments Volume 19 June 1993

CARTRIDGE SLOT EXPANSION OPTIONS FOR PAGERS

by John M. Burgan

INTRODUCTION

  In addition to a iadio receiver, a pager contains a general purpose microprocessor, memory, display and keyboard. This combination of circuitry is capable of doing many general purpose functions in addition to receiving pages. Also, many paging related features (such as escalerts, auto on/off, alarms) are being left out of some models due to limited memory size or cost con- straints. Since there are many specialty options that could be put into a pager that are not of general interest to all people, I propose adding a plug in expansion slot to a pager that would allow the user to purchase and install additional options that suit his personal needs.

DESCRIPTION

  The pager cartridge slot would accept a smaIl car- tridge that would contain the additional circuitry neces- sary to support the features being added (temperature sensors, DTMF encoders, or auxiliary receivers for exam- ple). The additional circuitry may also contain additional ram, ram, or additional CPU's depending on the com- plexity of the option. The customer could purchase optional cartridges for a variety of features that would take advantage of the pagers microprocessor, keyboard and display. For options requiring only additional soft- ware, an alternative to the plug in slot would be to put a block of non-volatile ram or EEPROM in the proces- sors directly addressable memory space to allow cus- tomer selected features or optional programs to be added by the leasing company through local hard contact pro- grammers or by over the air pages. This method would be limited to options that did not need any additional hardware.

POSSIBLE OPTIONS

  1) Alarm Databank/Scheduler C&ridge: Could store multiple alarms with dates and alphanumeric descrip- tions. The information could be entered using the key- board on the pager, or sent to it in a page.

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  2) Secondary Receiver Cartridge: Additional receive frequencies could be added by inserting an additional receiver into a cartridge slot. This would be particularly helpful in a scanning receiver application.

  3) Enhanced pager options: Auto on/off, Escalerts, Alarms and other pager enhancement options could be added to low cost pagers that do not have the internal memory space to support them.

  4) Fancy Alerts Cartridge: Sound affects, music, or recorded voice could be put in an optional cartridge to enhance the aler...