# US 5,710,809 A · Method of and system for efficient use of telecommunication voice networks

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- Number: US 5,710,809 A
- Document ID: US5710809A
- Status: Granted
- Kind: A
- Application number: 08/728,670
- Filed: 1996-10-10
- Granted: 1998-01-20
- Earliest claimed: 1994-10-11
- Assignees: Snip, Inc.
- Inventors: Alexander Mashinsky
- Web page: https://patentgrep.com/patent/US5710809A

## CPC

- H04M 15/8044: {Least cost routing}
- H04M 3/42195: {Arrangements for calling back a calling subscriber (when the wanted subscriber ceases to be busy H04M3/48)}
- H04M 3/48: Arrangements for recalling a calling subscriber when the wanted subscriber ceases to be busy
- H04M 15/00: Arrangements for metering, time-control or time indication {; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP}
- H04M 15/46: {Real-time negotiation between users and providers or operators}
- H04Q 3/0016: {Arrangements providing connection between exchanges}
- H04M 3/42102: {Making use of the called party identifier}
- H04M 3/42323: {PBX's with CTI arrangements}
- H04M 3/56: Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities (video conference systems H04N7/15)
- H04M 7/006: {Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer (H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42)}
- H04M 2203/5018: Initiating a conference during a two-party conversation, i.e. three-party service or three-way call
- H04M 2215/42: Least cost routing, i.e. provision for selecting the lowest cost tariff
- H04M 2215/56: On line or real-time flexible agreements between service providers and telecoms operators
- H04M 2215/745: Least cost routing, e.g. Automatic or manual, call by call or by preselection
- H04M 2242/22: Automatic class or number identification arrangements
- H04Q 3/72: Finding out and indicating number of calling subscriber
- H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08)
- H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W)

## Abstract

A system for use of a telecommunications voice network includes a communication node local to a calling location for acquiring calling and called party identification numbers and transmitting them to a central switching unit associated with a called location, through a transception channel independent of the telecommunications voice network. Further provided is a central switching unit for interrogating the called location to obtain a call supervision status thereof. Also provided is an apparatus for completing a first phonecall from the switching unit to the called location if the call supervision status is that of an answer, and for originating a second phonecall through the telecommunications network to the calling location. Teleconferencing of the first and second phonecalls then occurs. Further provided is an apparatus for providing an uncompleted call status signal to the central switching unit if the call status is that of a no answer or busy. The calling party is then appropriately advised. Upon termination of the second phonecall an answer supervision signal is sent by the local node to the central switching unit.

## Claims

### Claim 1

A method of connecting a calling telephone equipment to a called telephone equipment, comprising the steps of:
receiving at a local telecommunications node a first call placed from the calling telephone equipment via a telecommunication network,
transmitting a data message from the local telecommunications node to a remote switching unit in a data communication mode which is external to a voice communication mode of the telecommunication network, the message comprising a telephone number of the called telephone equipment,
placing a second call from the remote switching unit to the called telephone equipment via the telecommunication network,
after the second call has been answered, placing a third call via the telecommunication network from the remote switching unit to the calling telephone equipment through the local telecommunications node,
connecting the calling telephone equipment and the called telephone equipment by connecting the second and third calls at the remote switching unit,
whereby the third call is not placed if the second call is not answered at the called telephone equipment so that costs attributable to the third call are not incurred unless the second call is answered at the called telephone equipment.