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PRIVATE CONVERSATION VOICE MESSAGE FOR TRUNKED 2-WAY RADIO SYSTEMS

IP.com Disclosure Number: IPCOM000006133D
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-06
Document File: 2 page(s) / 101K

Publishing Venue

Motorola

Related People

Mitchell W. Leshin: AUTHOR

Abstract

The advent of Trunking SMRS has brought about the common use of 2-way FM radio communications to the private and industrial markets. Radio operators can easily use portable handi-talkies or mobile radios for instant communications wherever they are as long as they are within the range of the overall system. Even though the portability/mobility of these radios means that greater access to the users is possible, there are still times when contact to the target user is not possible.

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MOTOROLA INC. Technical Developments Volume12 April 1991

PRIVATE CONVERSATION VOICE MESSAGE FOR TRUNKED 2-WAY RADIO SYSTEMS

by Mitchell W. Leshin

   The advent of Trunking SMRS has brought about the common use of 2-way FM radio communications to the private and industrial markets. Radio operators can easily use portable handi-talkies or mobile radios for instant communications wherever they are as long as they are within the range of the overall system. Even though the portability/mobility of these radios means that greater access to the users is possible, there are still times when contact to the target user is not possible.

A. DEPOSITING A MESSAGE

  When a Private Conversation is requested and the target unit is unavailable, the system to date will send no response to the initiating radio. The automatic VOICE MESSAGE feature, relies upon the fact that the system knows that the target unit is unavailable. It would, therefore, respond to the Private Conversation Request with a unique acknowledgement indicating the target unit is to be replaced by the Voice Message Control Center (VMCC). Before the system provides an audio link between the unit and the VMCC, a delay would be provided allowing the subscriber unit to generate audio alert tones informing the user that a call will take place. The system would next assign a special repeater to allow the initiating user to leave a voice message for the target user. The special repeater requirements are full duplex audio connection to the VMCC.

  In addition to the audio connection, the VMCC would require a data link to the system controller. This link allows the message center to rout the repeater audio to one of its own audio ports and indicate the ID of the target radio.

  Once the audio connection has been established, prerecorded answering instruction messages would be transmitted to the initiating unit. This instruction message would inform the initiator to leave a voice message. The instruction message could also include

0 Motorola. Inc. ,991

the name of the target user to prevent messages being left for an incorrect target user. Additional features such as reviewing the deposite...