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WO2000028699A1 - Systeme ameliore, prive et combine de telecommunications telephoniques, transmissions de donnees et telecopies - Google Patents

Systeme ameliore, prive et combine de telecommunications telephoniques, transmissions de donnees et telecopies Download PDF

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Publication number
WO2000028699A1
WO2000028699A1 PCT/IN1999/000057 IN9900057W WO0028699A1 WO 2000028699 A1 WO2000028699 A1 WO 2000028699A1 IN 9900057 W IN9900057 W IN 9900057W WO 0028699 A1 WO0028699 A1 WO 0028699A1
Authority
WO
WIPO (PCT)
Prior art keywords
data
analogue
voice
network
vdps
Prior art date
Application number
PCT/IN1999/000057
Other languages
English (en)
Inventor
Pankaj Kumar Mitra
Original Assignee
Pankaj Kumar Mitra
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 Pankaj Kumar Mitra filed Critical Pankaj Kumar Mitra
Publication of WO2000028699A1 publication Critical patent/WO2000028699A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/2852—Metropolitan area networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/58—Arrangements providing connection between main exchange and sub-exchange or satellite
    • H04Q3/62—Arrangements providing connection between main exchange and sub-exchange or satellite for connecting to private branch exchanges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13034—A/D conversion, code compression/expansion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13179—Fax, still picture
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13209—ISDN
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13384—Inter-PBX traffic, PBX networks, e.g. corporate networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13389—LAN, internet

Definitions

  • This invention relates to an improved private combined voice, fax and, data telecorrmun icat ions network which facilitates voice, fax and data co ⁇ rmun icat ions on a single network connecting an organization's locations spread over a city, country, and the world, through analogue, digital, or a mixture of analogue and digital terrestrial leased lines, non-exchange leased lines or private wires, d i rect i onal i sed full duplex VHF, UHF radio links, multiple access radio relay (MARR), and point-to-point satellite links (used in case of long distance, inaccessible sites onl y ) .
  • MTR multiple access radio relay
  • VDPN voice over data private networks
  • PVDTN private voice data telecom network
  • DOT Department of Tel ecorrmun icat ions
  • PTT's postage, telephone, and telegraph authorities
  • the currently available trunk interfaces for ISDN (integrated services digital networks) compatiable EPAXs (electronic private automatic exchanges) which form the VDPSs (voice-data private-switches) in the PVDTN system are either 2W or ⁇ W, E& , analogue trunk cards, or 2 MBPS (mega bytes per second) digital trunk cards to CEPT specifications of 30B+2D channels.
  • Each B channel has a line speed or bandwidth of 6 KBPS (Kilo bytes per second), and each D channel has a line speed or bandwidth of 16 KBPS.
  • the CEPT cards are generally used for distribution of telephone connections to housing and commercial complexes under the group dialing franchisee scheme of various PTTs .
  • Fig.l Shows the wide area and metropolitan area network topology of the invented system.
  • Fig.2. Shows in detail the leased line connections to the VDPS trunks for analogue and digital leased lines, and also the tandem switching capability of the VDPSs.
  • Fig.3 Shows the detailed local area and metropolitan area connections of the VDPS and the trunk loop back system which facilitates data connectivity between the analogue and digital extensions of the same VDPS.
  • Fig.4 Shows the VDPS by-pass arrangement for forming fixes data pipes between LAN buses and also the details of the VDMAN connection through long line extensions, ASCS , and non-exchange leased lines or private wire circuits.
  • Figs.5. Shows the multiple access facility of the local HOST/SERVER computer.
  • DOT and other PTTs in the world are now making available digitial leased lines in 64 KBPS, or multiples thereof.
  • a 6 KBPS line is about 1.5 times more costly than an analogue leased line which has an effective data speed of 9.6 KBPS.
  • a 128 KBPS line costs 1.8 times that of a 64 KBPS line.
  • a 2 MBPS line costs 16 times the cost of a 64 KBPS line. To make any private network cost effective, it is, there- 0 fore, necessary to make the best use of available bandwidth .
  • a trunk system has, therefore, been incorporated in the present invention which will enable the PVDTN system to make effective use of the presently available 64 KBPS lines cost effectively.
  • This 0 comprises of analogue trunk cards of the VDPSs of the PVDTN system, which will terminate on multiple vecoders situated in ADPCM fixed channel multiplexers, the aggregate output of which will be connected to the 64 KBPS leased lines.
  • Similar circuitry is 5 employed on either end of all 64 KBPS circuits. This type of connection splits the 64 KBPS circuits into multiple channels for simultaneous conrmunicat ions in any combination of voice/ fax/data. A maximum of eight channels are recommended , and can increase
  • tandem switching capability as claimed in the PVDTN system will with the help of this new universal channel mu 11 ipl iat ion technique, of the present invention, facilitate simultaneous corrmun icat ions between A, B, C, D, E, F, G, H, over the single digital link between A and B, and the analogue connections between A to C, D, E and B to F,G,H, as shown in Fig.2 of the accompanying drawings.
  • VDPNs voice over data private networks
  • voice-data multiplexers data routers, etc.
  • Two types of multiplexers are in use.
  • the fixed channel type has the problem that when any one channel either voice, or fax, or data, are not in use the bandwidth allocated to it lies idle and cannot be used for any other type of corrmunicat i on .
  • voice/ fax/data corrmun icat ions can be integrated over a single network.
  • an adaptable bandwidth multiplexer was developed, but it brought with it the problem of inter-channel interference.
  • the new common trunk system of present invention therefore, gives major economic benefits, and technical advantages over the system of private voice and data teleconrmuni cat ions network of 176287; and comb ined with the latter it overcome s the deficiencies of the existing voice over data private networks using digital leased lines only, voice-data multiplexes, data routers, etc.. Since it also uses both analogue and digital leased lines, its reach is greater. It can connect any location in the world, irrespective of its distance and/or remoteness. 10. Since analogue trunk cards are used as standard in the VDPS, where analogue lines are available, these are directly terminated on these trunk cards.
  • the data connectivity is through switched universal channels which are suitable for either voice, or fax, or data corrmunicat ion, alternately, with automatic switching between the different modes of corrmunicat i on through the VDPS.
  • switched universal channels which are suitable for either voice, or fax, or data corrmunicat ion, alternately, with automatic switching between the different modes of corrmunicat i on through the VDPS.
  • the volume or frequency of data corrmunicat ions is high, such as the railway reservation system, the airline ticketing system, banks for ATM networks, etc, such universal switched connections may not always be conducive to functioning.
  • continuous non- switched data connections between LAN buses at either end of the line may be desired.
  • an arrangement has, therefore, been made to by-pass the VDPS at each location and terminate a line directly on the WAN (wide area network) ports of data routers sitting on the LAN (local area network) buses at either end of the line.
  • This can be done by segregating a part of the bandwidth of a digital 64 KBPS line, in the fixed channel ADPCM multiplexer through a data I/O ( i nput /output ) card, and terminating this on the data router WAN port, by-passing the VDPS at either end; or through a separate analogue leased line terminating on the WAN ports of the data routers at both ends of the line, by-passing the VDPS at either end, where digital leased lines are not available.
  • the arrangement is shown in Fig. .
  • the system can now provide the flexibility of the universal switched data connectivity, for normal data corrmunicat ions volumes and frequencies, and fixed non-switched data pipe connectivity for high vol ume s or frequencies of data corrmun icat ions .
  • a trunk loop back system has, therefore, been used, which will make this desired data connectivity between analogue and digital extensions of the same VDPS, possible.
  • This is shown in Fig.3.
  • This arrangement will give the following benefits to the PVDTN system of 176287.
  • It will facilitate use of analogue and long line analogue extensions of the VDPSs in making up the LAN with the help of the low cost high speed dial-up modems now available.
  • the more costly digital extensions will be used for larger distances where the cost of cabling justifies the use of a single shielded twisted pair cable and voice-data telephone for simultaneous voice/data connect- ivity in the LAN.
  • Auxiliary VDPSs situated at the additional locations connected to the main VDPS in the city/town through analogue or digital lines, or alternatively, individual non-exchange leased lines connecting telephones, fax machines, and computers through dial- up modems to the long-line extensions of the central VDPS in each city or town up-to a distance of about 15 Kms .
  • MDFs Main Distribution Frames
  • a system has, therefore, been incorporated comprising of long line analogue extensions, analogue subscriber carrier system (ASCS), and non-exchange leased lines or private wire, as shown in Fig.4 which provides the following benefits to the patented private voice data telecorrmunications network system of 176287, and in combination with the latter produces a VDMAN solution which is much lower in cost than the voice over data private network (VODPN) system referred to in option 1 above.
  • VDPN voice over data private network
  • the new VDMAN solution will provide the following benef its.
  • a single non-exchange line hired from the PTT facilitates up-to eight long line extensions of the central VDPS in each city/town to be connected to telephones, fax machines, and computers through dial-up modems, at the remote location of the Company /Organ i zat i on in the same city/town, through the analogue subscriber system (ASCS).
  • the telephones, fax machines, and computers situated in the remote location have simultaneous access to the VDPS at the central location and through it to the rest of the network.
  • LTS line terminal servers
  • VDTs digital extensions and voice-data telephones with digital terminal interfaces
  • This arrangement facilitates multiple simultaneous access to the Host/Server at each city/town from any computer in the VDLAN/VDMAN across the voice data wide area network VDWAN.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Astronomy & Astrophysics (AREA)
  • General Physics & Mathematics (AREA)
  • Sub-Exchange Stations And Push- Button Telephones (AREA)
  • Telephonic Communication Services (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

L'invention porte sur un réseau privé, combiné, de télécommunications téléphoniques, transmissions de télécopies et de données, approprié pour effectuer des communications téléphoniques, et des transmissions de télécopies et de données entre des sites d'organisation répartis sur un réseau urbain, national et international de lignes analogiques et numériques et de liaisons satellites point à point. Ce réseau comprend des supports de transmission entre tous les points principaux du réseau et entre les points principaux et mineurs de leurs régions, des commutateurs privés de communications téléphoniques et de transmissions de données (VDP), des modems pour des lignes louées analogiques et des modems commutés pour des extensions analogiques et longue distance. L'invention porte également sur un agencement de ligne commune de circuits de jonction analogique des commutateurs privés de communications téléphoniques et de transmissions de données qui se raccordent sur plusieurs vocodeurs des multiplexeurs de canaux fixes, et sur un agencement de dérivation de VDP utilisé pour créer des canaux fixes de communication de données destinés à des liaisons de données directes et continues de réseaux locaux dans un réseau métropolitain/réseau étendu de communications téléphoniques et de transmissions de données sans commutation à l'aide d'une partie réservée de la largeur de bande d'une ligne louée qui est disponible entre les deux sites raccordés.
PCT/IN1999/000057 1998-10-23 1999-10-25 Systeme ameliore, prive et combine de telecommunications telephoniques, transmissions de donnees et telecopies WO2000028699A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN1889/CAL/98 1998-10-23
IN1889CA1998 1998-10-23

Publications (1)

Publication Number Publication Date
WO2000028699A1 true WO2000028699A1 (fr) 2000-05-18

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Family Applications (1)

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PCT/IN1999/000057 WO2000028699A1 (fr) 1998-10-23 1999-10-25 Systeme ameliore, prive et combine de telecommunications telephoniques, transmissions de donnees et telecopies

Country Status (1)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006124916A3 (fr) * 2005-05-18 2007-11-29 Formation Inc Circuit de derivation ethernet a semi-conducteur
CN101060493B (zh) * 2007-05-14 2011-10-26 中兴通讯股份有限公司 一种私网内用户通过域名访问私网内服务器的方法
CN107911158A (zh) * 2017-09-27 2018-04-13 西安空间无线电技术研究所 一种基于虚拟数据平面的服务架构以及提供服务的方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675619A1 (fr) * 1994-03-30 1995-10-04 T.R.T. Telecommunications Radioelectriques Et Telephoniques Système et équipement d'interconnexion de réseaux locaux et procédé d'obtention d'addresses
WO1996028940A2 (fr) * 1995-03-03 1996-09-19 Intecom, Incorporated Systeme et procede de signalisation et de traitement d'appel applicables aux systemes de communication prives et hybrides, y compris les systemes multimedia
EP0737019A2 (fr) * 1995-04-07 1996-10-09 AT&T Corp. Méthode et dispositif pour l'échange de données administratives entre réseaux locaux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0675619A1 (fr) * 1994-03-30 1995-10-04 T.R.T. Telecommunications Radioelectriques Et Telephoniques Système et équipement d'interconnexion de réseaux locaux et procédé d'obtention d'addresses
WO1996028940A2 (fr) * 1995-03-03 1996-09-19 Intecom, Incorporated Systeme et procede de signalisation et de traitement d'appel applicables aux systemes de communication prives et hybrides, y compris les systemes multimedia
EP0737019A2 (fr) * 1995-04-07 1996-10-09 AT&T Corp. Méthode et dispositif pour l'échange de données administratives entre réseaux locaux

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006124916A3 (fr) * 2005-05-18 2007-11-29 Formation Inc Circuit de derivation ethernet a semi-conducteur
US7664012B2 (en) 2005-05-18 2010-02-16 Formation, Inc. Solid-state ethernet by-pass switch circuitry
CN101060493B (zh) * 2007-05-14 2011-10-26 中兴通讯股份有限公司 一种私网内用户通过域名访问私网内服务器的方法
CN107911158A (zh) * 2017-09-27 2018-04-13 西安空间无线电技术研究所 一种基于虚拟数据平面的服务架构以及提供服务的方法
CN107911158B (zh) * 2017-09-27 2020-05-08 西安空间无线电技术研究所 一种基于虚拟数据平面的服务系统以及提供服务的方法

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