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WO1998051098A1 - Systeme et procede permettant d'etablir deux liaisons au moyen d'une interface analogique connectee a un reseau telephonique - Google Patents

Systeme et procede permettant d'etablir deux liaisons au moyen d'une interface analogique connectee a un reseau telephonique Download PDF

Info

Publication number
WO1998051098A1
WO1998051098A1 PCT/US1997/007612 US9707612W WO9851098A1 WO 1998051098 A1 WO1998051098 A1 WO 1998051098A1 US 9707612 W US9707612 W US 9707612W WO 9851098 A1 WO9851098 A1 WO 9851098A1
Authority
WO
WIPO (PCT)
Prior art keywords
call
calls
telephone network
control channel
terminal equipment
Prior art date
Application number
PCT/US1997/007612
Other languages
English (en)
Inventor
Frederick M. Burg
Anthony Schiano
Hashem Sherif Mosta
Kamlesh T. Tewani
Original Assignee
At & T Corp.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by At & T Corp. filed Critical At & T Corp.
Priority to PCT/US1997/007612 priority Critical patent/WO1998051098A1/fr
Publication of WO1998051098A1 publication Critical patent/WO1998051098A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q5/00—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange
    • H04Q5/02—Selecting arrangements wherein two or more subscriber stations are connected by the same line to the exchange with direct connection for all subscribers, i.e. party-line systems

Definitions

  • This invention relates to a system and method for completing at least two calls from a premises that is connected by a single point-of-attachment having a single phone number to a telephone network and more particularly a public switched telephone network using an analog interface.
  • networks using packet-switched data networks use digital terminations and allow multiple calls over the network.
  • Other examples include frame-relay networks, described in ITU-T recommendation 1.233; narrow-band ISDN, described in ITU-T recommendation 1.210; and broad-band ISDN networks, described in ITU-T recommendation 1.211. These services use digital terminations that can be expensive to implement and maintain.
  • a premises connected by a point-of-attachment to the public switched Telephone Network (PSTN) having a single phone number for handling voice calls with the standard, analog "tip-and-ring" interface could carry a modulated signal between the premises and the public switched telephone network that includes multi-call capability from terminal equipment located on the premises, such as a telephone, video, fax machine, or computer.
  • PSTN public switched Telephone Network
  • Other examples could include someone making two telephone calls to the network, or using a computer and fax machine or a telephone and fax machine simultaneously.
  • the present invention now allows a method and system for completing at least two calls originating from terminal equipment located at a premises and connected by a point- of-attachment having a single phone number to a telephone network where one dial tone is provided on an analog interface to the premises.
  • the method and system of this invention permits multiple calls, such as an analog phone, video, data, fax and comparable calls over a single analog interface. It can be extended to allow an increased number of calls by utilizing additional analog interfaces. Such an extension, sometimes known as a multi-link arrangement, provides for any allocation of the multiple calls across the plurality of analog interfaces.
  • a control channel is established between the telephone network, such as a public switched telephone network, and the terminal equipment located at the premises.
  • At least two calls originating from premises equipment and the control channel are combined at the premises into a modulated analog signal having a separate channel for each call.
  • any incoming calls are combined with the above calls and the control channel for transmission between the customer premises and the public switched telephone network.
  • Identity information is transmitted from the originating terminal equipment through the control channel to aid in determining a remote device with which a call is desired. This includes auxiliary information for progressing the call.
  • the signal is transmitted from a modulation/demodulation device as a modulated analog signal to the public switched telephone network.
  • the modulated analog signal is split into respective calls and the control channel, and the calls are then forwarded to a respective remote device based on identity information and auxiliary information received through the control channel.
  • the calls can be split at the public switched telephone network.
  • the public switched telephone network can also include a cellular network. Identifiers are associated with each channel for distinguishing each channel within the public switched telephone network.
  • Each channel can also comprise a plurality of information blocks, and identifiers can be associated between the public switched telephone network and the terminal equipment for each channel to distinguish the information blocks belonging to each call or control channel.
  • Figure 1 is a simplified block diagram of a telephone network including the intelligent network components of the public switched telephone network and other components suitable for use with the present invention.
  • Figure 2 is a schematic representation of the control channel between terminal equipment at the premises and the public switched telephone network.
  • Figure 3 shows in greater detail multiple channels between the terminal equipment and the public switched telephone network and respective calls extending to remote units.
  • Figure 4 shows in greater detail the use of identifiers for information blocks to distinguish between calls.
  • Figure 5 is a schematic diagram showing operation of the control channel.
  • Figure 6 is a block diagram showing one aspect of the method of the present invention. Detailed Description of the Invention
  • FIG. 1 there is illustrated an overview of the public switched telephone network 10 that is connected via a first Local Exchange Company (LEC) 12 to a premises 14, such as a residential premises, having a personal computer 16 and analog telephone 18.
  • LEC Local Exchange Company
  • the present method and system allows multi-call capability from the premises 14 connected via an analog interface having a single phone number.
  • Multi-call capability in accordance with the present invention includes the merging of two or more calls such as analog phone, data, video, fax and other similar calls.
  • the analog telephone 18 and personal computer 16 as well as any other equipment (not shown) such as fax or video are devices and connected to or included as part of multi- call terminal equipment 20 (hereafter "terminal equipment"), and includes a modulation/demodulation device 22.
  • the multi-call terminal equipment 20 can be integrated into one physical structure or box at the premises and can be located in a small business, residential premises, or other premises where a single point-of-attachment having a single phone line to a public switch telephone network uses an analog interface.
  • the modulation/demodulation device 22 can be a regular modem, limited distance modem, or a line driver.
  • the LEC 12 is connected to the premises 14 and terminal equipment 20 by a point-of-attachment having a single phone line using an analog interface that supplies one dial tone to the premises.
  • the public switched telephone network 10 includes Service Switching Points (SSP) 24 and a standard CCS7 signaling network 26 that is connected to a Service Control Point (SCP) 28, which also includes a database 30 as is conventional.
  • SSP Service Switching Points
  • SCP Service Control Point
  • the public switched telephone network 10 also includes a cellular network 32 that is connected to a Service Switching Point 24 via a Mobile Switching Office (MSO) 34.
  • MSO Mobile Switching Office
  • the public switched telephone network 10 also connects to a second Local Exchange Company (LEC) 40, which connects to a second premises 42 having remote devices, i.e., a personal computer 44 and analog telephone 46, and a third premises 48 having an analog telephone 50.
  • LEC Local Exchange Company
  • MC-call service element MC-call service element
  • the multi-call service element 52 could be an integral part of the switch 24.
  • the MC-SE could be located outside the network in a premises.
  • the LEC 12 provides the modem-to-modem connectivity.
  • the multi-call service element 52 includes processing hardware, including a modulation demodulation function 55, and may have an associated database 56 that could store routing information, the telephone numbers of those subscribers who use the present system and method for establishing multi-call capability using a single phone line and analog interface.
  • the Database 30 also can be used for storing telephone numbers of subscribers, and would be preferred.
  • the terminal equipment of the present invention contacts the public switched telephone network, and more particularly the multi-call service element and a modulated signal is established (Block 100). It should be understood, that the public switched telephone network could contact the multi-call temiinal equipment for a first incoming call.
  • the public switched telephone network 10 through its multi-call service element 52, then establishes a control channel 58 ( Figure 2) for signalling purposes between the multi-call service element and the terminal equipment 20 (Block 102). It should be understood that the establishment of a control channel could be done by either party after the modem connection has been made regardless of which side originated the modem connection.
  • the control channel 58 is used for signalling and goes over the modulated connection.
  • the originating terminal equipment 20 then can place a call, such as voice, data, fax or video call, via the control channel 58, to a remote multi-call terminal element that is also a subscriber to the present multi-call system, such as the personal computer 44 shown in the second premises 42 in Figure 1 and to a remote existing terminal that is not subscriber to the present multi-call system, such as the analog telephone 50 shown in the third premises 48 in Figure 1.
  • a remote multi-call terminal element that is also a subscriber to the present multi-call system, such as the personal computer 44 shown in the second premises 42 in Figure 1 and to a remote existing terminal that is not subscriber to the present multi-call system, such as the analog telephone 50 shown in the third premises 48 in Figure 1.
  • the multi-call service element 52 places a call to the remote terminal equipment (Block 104). This is done through an interface to a telephone switch by signalling the need to set up a new call.
  • the signalling on this interface naturally depends on the relationship between the multi-call service element 52 and the telephone switch 24.
  • the relationship could involve a mapping of the information flow (messages) and the information elements (semantics and syntax) between the MC-TE/MC-SE on the first interface and the MC-SE telephone switch interface.
  • the mapping would involve mapping a connect message on the first interface to an Initial Address Message (LAM) on the second, providing, the MC-SE has the capability of sending these messages to the SSP 24 as shown in Figure 1.
  • LAM Initial Address Message
  • Figure 5 shows the relationship of control channels between MC-SE and MC- TE's.
  • a query is sent to the database 56 contained in the multi-call service element 52 or database 30 to determine if the called number is a subscriber to the multi-call system of the present invention (Block 106). If the called number is not a subscriber to the multi-call system, or if any remote terminal equipment 42 is not using this service at the time, a normal "tip-and-ring" call is placed to the remote device (Block 108).
  • unique identifiers are associated with the call (Block 105) on the calling side, and if the remote device is also a subscriber to the present invention, at the called side and the set of identifiers are associated with both sides (110).
  • a unique identifier is chosen by the establishing party (premises for outgoing call; MC-SE for incoming call). This is used subsequently by both parties to identify the "blocks" or packets of information that flow over the channel (between the premises and the MC-SE) belonging to each call.
  • the control channel has its own identifier (probably zero since it is the first channel established). But these identifiers are local to the premises/MC-SE channel (interface). If the remote end is also served by this invention, that MC-SE/premises pick their own identifier for the channel serving that part of the call; if not, then a regular call is set up and no identifier is used or needed at the remote end. Additionally, auxiliary information can be transmitted to aid in progressing the call.
  • Auxiliary information from the calling side could include the type of calling device (e.g., fax) for proper completion at the remote end or a request for language translation between the two parties.
  • type of calling device e.g., fax
  • auxiliary information For incoming calls, auxiliary information includes the remote side's calling party ID for display at the premise, assuming it is not blocked.
  • the information blocks, or packets carry information pertaining to the control channel.
  • these can be messages for setting up calls.
  • voice channels these are compressed and digitized voice packets.
  • voice channels these are digital parts of the scanned page.
  • the identifier is a unique number or other unique identifier. Using the unique identifier as established during the call set up, the public switched telephone network 10, through its multi-call service element 52, transmits information blocks associated with that first call between the multi-call terminal equipment 20 and the remote device (Block 112).
  • another call can be originated to or received from other terminal equipment (Block 114).
  • One of the calls is then finished (Block 116). If there are any remaining calls (Block 118), then information blocks continue to be transmitted (Block 112) on the remaining channels. If there are no remaining calls, the connection can be terminated with the public switched telephone network (Block 120).
  • the current invention as set forth in the system and method as described above now allows multi-call capability even with the analog interface existing between the public switched telephone network 10 and a standard premises or other analog interface to be used while allowing multiple calls.
  • a telecommuter could be working at home and accessing an e-mail server. While this interaction occurs, the telecommuter also can place a voice call to a fellow worker to discuss another project.
  • the multi-call service of the present invention provides the capability of the telecommuter to originate two calls. Additionally, the telecommuter could receive a call while accessing the e-mail server.
  • a child can access a game server or "surf-the-web" .
  • the child's parents can originate or receive voice calls.
  • a worker in a "small-office/home-office" may need to discuss an ongoing project with his/her partner using material in a fax.
  • the partner may not have the proper type of terminal equipment, but the partner does have two separate phone lines, one which is connected to a fax machine.
  • the service of the present invention can be used by the worker to split the calls within the public switched telephone network, placing the voice call to the partner on the proper line and a fax call to the other line.
  • a network trouble-shooter receives a voice call from a customer having trouble accessing the network, which is remote from the customer. Both people have multi-call terminal equipment capable of using the system of the present invention. While talking to the customer, the trouble-shooter could access the network and determine the problem and then resolve it.
  • the customer could be directed to access the network without hanging up with the trouble-shooter. When the customer is satisfied that the problem has been resolved, each party can then release both calls. 5) A person at home could be talking to someone on a voice call. While this is occurring, someone in the same home can place a second call using the same phone line and number. The two calls can be to two different destinations.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Telephonic Communication Services (AREA)

Abstract

Selon la présente invention, le système et le procédé permettent d'établir au moins deux liaisons provenant d'un équipement terminal placé en un lieu spécifique et connecté par un point de desserte présentant un seul numéro de téléphone sur un réseau téléphonique public commuté (RTPC) où une tonalité est envoyée au lieu en question. De multiples liaisons sont alors autorisées avec une interface analogique sur un RTPC. Au moins deux liaisons et un canal de commande se combinent et se transforment en un signal analogique modulé présentant un canal séparé pour chaque liaison et émis à travers un modem sous forme d'un signal analogique modulé à destination du RTPC. Le signal analogique modulé est démultiplexé de façon à restituer chacune des liaisons et le canal de commande. L'acheminement ultérieur de chaque liaison à destination du dispositif distant concerné s'effectue en fonction des informations d'identité et des informations annexes reçues via le canal de commande.
PCT/US1997/007612 1997-05-06 1997-05-06 Systeme et procede permettant d'etablir deux liaisons au moyen d'une interface analogique connectee a un reseau telephonique WO1998051098A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US1997/007612 WO1998051098A1 (fr) 1997-05-06 1997-05-06 Systeme et procede permettant d'etablir deux liaisons au moyen d'une interface analogique connectee a un reseau telephonique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US1997/007612 WO1998051098A1 (fr) 1997-05-06 1997-05-06 Systeme et procede permettant d'etablir deux liaisons au moyen d'une interface analogique connectee a un reseau telephonique

Publications (1)

Publication Number Publication Date
WO1998051098A1 true WO1998051098A1 (fr) 1998-11-12

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PCT/US1997/007612 WO1998051098A1 (fr) 1997-05-06 1997-05-06 Systeme et procede permettant d'etablir deux liaisons au moyen d'une interface analogique connectee a un reseau telephonique

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002054748A1 (fr) * 2001-01-02 2002-07-11 Rb 2001 Aps Systeme et procede pour le partage de ligne telephonique

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440307A1 (de) * 1984-11-05 1986-05-22 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung fuer zweieranschluesse bei fernmelde-, insbesondere fernsprechvermittlungsanlagen
GB2187611A (en) * 1986-03-05 1987-09-09 Telebit Corp A speech and data multiplexor optimized for use over impaired and bandwidth restricted analog channels
US5182768A (en) * 1991-10-21 1993-01-26 Nitsuko Corporation Digital telephone set capable of being simultaneously used by a plurality of persons by using one transmission line
US5214650A (en) * 1990-11-19 1993-05-25 Ag Communication Systems Corporation Simultaneous voice and data system using the existing two-wire inter-face
EP0653872A1 (fr) * 1993-11-15 1995-05-17 AT&T Corp. Conversion de modulation fac-similé en modulation de données
US5428608A (en) * 1993-12-30 1995-06-27 At&T Corp. Call connection technique
EP0674420A1 (fr) * 1994-03-23 1995-09-27 AT&T Corp. Appels de parole et de données commutés indépendamment utilisant un modem de parole et de données simultané
US5625677A (en) * 1993-12-30 1997-04-29 At&T Simultaneous voice and data communications

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3440307A1 (de) * 1984-11-05 1986-05-22 Telefonbau Und Normalzeit Gmbh, 6000 Frankfurt Schaltungsanordnung fuer zweieranschluesse bei fernmelde-, insbesondere fernsprechvermittlungsanlagen
GB2187611A (en) * 1986-03-05 1987-09-09 Telebit Corp A speech and data multiplexor optimized for use over impaired and bandwidth restricted analog channels
US5214650A (en) * 1990-11-19 1993-05-25 Ag Communication Systems Corporation Simultaneous voice and data system using the existing two-wire inter-face
US5182768A (en) * 1991-10-21 1993-01-26 Nitsuko Corporation Digital telephone set capable of being simultaneously used by a plurality of persons by using one transmission line
EP0653872A1 (fr) * 1993-11-15 1995-05-17 AT&T Corp. Conversion de modulation fac-similé en modulation de données
US5428608A (en) * 1993-12-30 1995-06-27 At&T Corp. Call connection technique
US5625677A (en) * 1993-12-30 1997-04-29 At&T Simultaneous voice and data communications
EP0674420A1 (fr) * 1994-03-23 1995-09-27 AT&T Corp. Appels de parole et de données commutés indépendamment utilisant un modem de parole et de données simultané

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002054748A1 (fr) * 2001-01-02 2002-07-11 Rb 2001 Aps Systeme et procede pour le partage de ligne telephonique

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