Browse Prior Art Database

FULL OFF AIR CALL SET-UP USING CONVENTIONAL SIGNALING

IP.com Disclosure Number: IPCOM000009527D
Original Publication Date: 1999-Sep-01
Included in the Prior Art Database: 2002-Aug-29
Document File: 4 page(s) / 132K

Publishing Venue

Motorola

Related People

Pauline Webster: AUTHOR [+2]

Abstract

A called radio unit may transmit different types of acknowledgements to a calling radio unit, depending on whether a user answers a call, whether a call enters a stack or whether a voice message should be left. The acknowledgements can be used by a calling radio to provide call progress indica- tions, such as informative text and/or alerts, to the user of the calling radio.

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Developments Technical 0 M MOTOROLA

   FULL OFF AIR CALL SET-UP USING CONVENTIONAL SIGNALING

by Pauline Webster and Richard Bromham

PROPOSED SOLUTION

  A radio can be programmed to start a call answer timer when it receives an individual call.

If the user of the called radio answers the call,
e.g. by going off-hook, then a status telegram linked to this action can be transmitted. This status telegram can be decoded by the calling radio and an appropriate message can be displayed to the user of the calling radio to indicate success of the call attempt. See the appended Figure 1.

  If the call answer timer expires and stacker oper- ation has been enabled in the called radio, then the call enters the called radio's stack. The called radio can transmit a telegram to the calling radio with sta- tus indicating "Call Stacked". The calling radio can decode this status telegram and display an appropri- ate message to the user of the calling radio. See Figure 2.

  If the call answer timer expires and voice stor- age has been enabled in the called radio, then the called radio can transmit a telegram to the calling radio with status indicating "Voice Storage". The calling radio can decode this status telegram and display an appropriate message to the calling radio, inviting the user to leave a voice-mail message. See Figure 3.

  If no reply is received from the called radio within the call answer time, e.g. when the radio is turned off, or on the wrong channel, then "Call Failed" could be displayed on the display of the calling radio.

0 Motomla. 1°C. 1999 189 September 1999

ABSTRACT

  A called radio unit may transmit different types of acknowledgements to a calling radio unit, depending on whether a user answers a call, whether a call enters a stack or whether a voice message should be left. The acknowledgements can be used by a calling radio to provide call progress indica- tions, such as informative text and/or alerts, to the user of the calling radio.

INTRODUCTION

  This paper describes how 2-way mobile or portable radios can use conventional signaling (MDCLSelect 5) to provide call progress information to a user of a calling radio. This information may be used by the calling radio to indicate to the user that a call has been answered, a call has been stacked, or that a voice message should be left.

PROBLEMS TO BE SOLVED

  Currently, with conventional signaling, receiv- ing an 'autoacknowledge' after setting u...