Browse Prior Art Database

MOBILE TELEPHONE TOLL CALL ROUTING

IP.com Disclosure Number: IPCOM000005965D
Original Publication Date: 1990-Oct-01
Included in the Prior Art Database: 2001-Nov-20
Document File: 2 page(s) / 103K

Publishing Venue

Motorola

Related People

Masoud Bassiri: AUTHOR [+2]

Abstract

Land Mobile Radio (LMR) systems that support telephone interconnect many times do not have the sophisticated ability to internally track and generate accurate long distance phone charges should the system subscribers wish to place calls outside their normal telephone calling area. This is so since the phone bill is a function of many variables such as distance, time of day, and of course, duration. In order to provide the subscribers with long distance dialing capability, it is common for these subscribers to access a long distance phone network by dialing a local access number. Several long distance carriers are available that offer competitive rates. Subscribing customers receive their own ac- count number, which they enter upon accessing the long distance carrier's network through that local access number. The charges for the long distance calls are hence handled by the long distance carrier and are periodically mailed directly to the customer.

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MO7-OROLA Technical Developments October 1990

MOBILE TELEPHONE TOLL CALL ROUTING

by Masoud Bassiri and Gary Grube

   Land Mobile Radio (LMR) systems that support telephone interconnect many times do not have the sophisticated ability to internally track and generate accurate long distance phone charges should the system subscribers wish to place calls outside their normal telephone calling area. This is so since the phone bill is a function of many variables such as distance, time of day, and of course, duration. In order to provide the subscribers with long distance dialing capability, it is common for these subscribers to access a long distance phone network by dialing a local access number. Several long distance carriers are available that offer competitive rates. Subscribing customers receive their own ac- count number, which they enter upon accessing the long distance carrier's network through that local access number. The charges for the long distance calls are hence handled by the long distance carrier and are periodically mailed directly to the customer.

local

This method of long distance network access is a manual process required the radio subscriber to first dial the access number (7 digits), next they dial in their long distance carrier account number (lo-14 digits), and finally the target long distance number (10 digits). As one can see this is somewhat involved, dialing 27 to 31 digits! Besides being a tedious task for the subscriber, these numbers are typically transmitted over the radio channel using common easily dewdable Dual Tone Multi-Function (DTMF) digits. In some cases these DTMF digits could be monitored by those of an unscrupulous nature looking for someone's long distance carrier network account number. These undesirable attributes are eliminated with this invention.

   Generally, these LMR systems use a separate channel and different (other than DTMF) radio identification signall- ing means. This invention can be applied to such a system and works as follows. The radio unit subscriber starts the phone call as usual, bu...