WO1997029585A1 - Cartes de ligne pour uvg, paiement par pieces, reseau isdn et pour des services speciaux - Google Patents

Cartes de ligne pour uvg, paiement par pieces, reseau isdn et pour des services speciaux

Info

Publication number
WO1997029585A1
WO1997029585A1 PCT/US1997/001245 US9701245W WO9729585A1 WO 1997029585 A1 WO1997029585 A1 WO 1997029585A1 US 9701245 W US9701245 W US 9701245W WO 9729585 A1 WO9729585 A1 WO 9729585A1
Authority
WO
WIPO (PCT)
Prior art keywords
voice
services
signal
circuit
channel unit
Prior art date
Application number
PCT/US1997/001245
Other languages
English (en)
Inventor
Thomas R. Eames
Jaskarn S. Johal
Original Assignee
Next Level Communications
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 Next Level Communications filed Critical Next Level Communications
Priority to AU18406/97A priority Critical patent/AU1840697A/en
Publication of WO1997029585A1 publication Critical patent/WO1997029585A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/02—Current supply arrangements for telephone systems providing ringing current or supervisory tones, e.g. dialling tone or busy tone
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M17/00—Prepayment of wireline communication systems, wireless communication systems or telephone systems
    • H04M17/02—Coin-freed or check-freed systems, e.g. mobile- or card-operated phones, public telephones or booths
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/005—Interface circuits for subscriber lines
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13003—Constructional details of switching devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1301—Optical transmission, optical switches
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/1329—Asynchronous transfer mode, ATM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13298—Local loop systems, access network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
    • H04Q2213/13322—Integrated circuits

Definitions

  • the present invention relates to a method and apparatus for delivering Plain Old Telephony (POTs) voice telecommunications services in combination with coin phone, Integrated Service Digital Network (ISDN) and special services .
  • POTs Plain Old Telephony
  • ISDN Integrated Service Digital Network
  • Fiber-to-the-curb (FTTC) systems can provide both traditional telecommunications services such as Plain Old Telephony service (POTs) , coin phone services, Integrated Services Digital Network (ISDN) and special telecommunications services as well as advanced multimedia services such as Switched Digital Video
  • FTTC systems typically have equipment in the central office including a Host Digital Terminal (HDT) which is connected by optical fiber to an Optical Network Unit (ONU) , which can be located on a telephone pole or in a pedestal in a neighborhood.
  • HDT Host Digital Terminal
  • ONU Optical Network Unit
  • a printed circuit board containing electronics and frequently referred to as a channel unit or line card is inserted into the ONU to provide telecommunications services over the twisted copper pair.
  • the ONU typically serves between 8 and 16 residences. Each subscriber is provided service by a subscriber circuit on a line card in the ONU.
  • UVG Universal Voice Grade
  • PBX Private Branch Exchange
  • 800 number service lines The UVG card cannot provide coin phone or IDSN services without additional or substantially different circuitry.
  • Construction of an ONU is typically such that the line cards (UVG or otherwise) can be inserted into the ONU and made operational as additional lines are required.
  • line cards UVG or otherwise
  • a second approach to solving this problem is to have a line card which contains four or six UVG, coin, or ISDN circuits. Since multiple identical circuits are on the same board, a cost savings over multiple individual boards with the same circuit can be realized, and the number of slots required in the ONU to serve a given number of subscribers is decreased over that which would be found if dual or single circuit cards are used.
  • the drawback with this approach is that it is difficult to match the percentage of coin or ISDN circuits provided with the percentage of coin or ISDN circuits required since insertion of an ISDN or coin card results in four or six coin or ISDN circuits.
  • a channel unit or line card contains a circuit for Plain Old Telephony service (POTs) and a circuit for a service such as Integrated Services Digital Network (ISDN) , coin (pay phone) service, a Tl line, or another type of special service.
  • POTs Plain Old Telephony service
  • ISDN Integrated Services Digital Network
  • coin (pay phone) service a Tl line
  • Another feature of the present invention is that it allows for multiple POTs circuits in conjunction with a circuit for other types of telecommunications services on one line card.
  • POTs circuits with circuits for special telecommunications services it is possible to provide the infrequently requested telecommunications services in addition to the commonly used POTs services without having to have a separate line card.
  • line cards having one coin circuit or one ISDN circuit and five POTs circuits allow for a close statistical match between the number of coin and ISDN circuits required and the number of circuits supported by the equipment. Close matching between the demand and the available circuits prevents having to have partially utilized line cards in the telecommunications equipment, which would require more than the minimum amount of space and power. Optimizing the line card results in a more efficient and cost-effective network.
  • the present invention provides for the deployment of line cards at an Optical Network Unit (ONU) where the line cards have multiple POTs circuits and one ISDN, coin phone, or special service circuit.
  • the present invention also allows for delivery of special services by generating a Tl circuit on a hybrid Tl line card at an ONU, and transmitting the Tl signal to a special services unit, where a special service line card is used to generate the subscriber interface for that special service.
  • the hybrid Tl line card contains four POTs circuits and one Tl circuit, thereby allowing the card to be used for POTs services in addition to the Tl service. Dedicating a line card to Tl service without providing POTs services would utilize an entire slot in the ONU and severely limit the POTs capacity of the ONU.
  • FIG. 1 shows a Fiber-to-the-Curb network
  • FIG. 2 shows a functional block diagram of a Broadband Network Unit
  • FIG. 3 shows a functional block diagram of a dual line Universal Voice Grade card circuit
  • FIG. 4 shows a functional block diagram of a dual line Universal Voice Grade/ISDN circuit
  • FIG. 5 shows a functional block diagram of a Universal Voice Grade/coin circuit
  • FIG. 6 shows a method of delivering special services in a FTTC network using a Tl hybrid card
  • FIG. 7 shows an architectural view of a Tl hybrid card
  • FIG. 8 shows a block diagram of a Tl circuit.
  • FIG. 1 illustrates a FTTC system which comprises a Broadband Digital Terminal (BDT) 100, which is connected by an optical fiber 200 to a Broadband Network Unit (BNU) 110.
  • the BNU 110 contains an optical receiver and transmitter to receive signals from and send signals to the BDT 100, as well one or more Universal Voice Grade cards 140 which connect to residences 175 via twisted pair drop cable 260.
  • the in-home twisted pair cable 280 connects the telephone 185 to the twisted pair drop cable 260.
  • the term Broadband Digital Terminal can be used interchangeably with the term Host Digital Terminal.
  • the term Broadband Network Unit can be used interchangeably with the term Optical Network Unit .
  • BNU 110 serves 8 residences 175, each residence having one or more twisted pair drop cable 260 coming from the BNU 110.
  • Each BDT 100 typically serves 64 BNUs 110.
  • the BDT 100 is connected to telecommunications networks via a Public Switched Telecommunication Network (PSTN) switch 10, and networks for advanced services such as the Asynchronous Transfer Mode (ATM) network 7.
  • PSTN Public Switched Telecommunication Network
  • ATM Asynchronous Transfer Mode
  • the interface to the PSTN switch 10 is the switch interface 12, which in the US will be specified by Bellcore specification TR-TSY-000008, TR-NWT-000057 or TR-N T-000303.
  • the BDT 100 can also receive special services signals from private or non-switched public networks.
  • the FTTC system can be controlled through the use of an Element Management System (EMS) 150 which is software which runs on a workstation or computer which is connected to the BDT 100.
  • EMS 150 provides the ability to provision services or equipment which is effect the ability to modify the state of equipment in the system or provide new services.
  • the EMS 150 can typically be operated locally by an operator at the workstation or PC, or remotely via a connection through the PSTN switch 10 or the ATM network 7.
  • the EMS 150 also provides the ability to monitor and control the UVG cards 140 in the BNU 110.
  • Telecommunications systems are based on standards which have evolved over many years and insure compatibility of equipment from different manufacturers as well as providing clearly defined and precise specifications for different types of telecommunications services so that these services can be provided across geographic boundaries in a network with various generations of analog and digital telecommunications equipment .
  • TA-N T-000909 entitled “Generic Requirements and Objectives for Fiber in the Loop Systems," Issue 2, December 1993, provides a comprehensive description of the requirements for FTTC systems as well as signaling and transmission requirements for UVG circuits, and is incorporated herein by reference.
  • a UVG circuit is defined as one which can provide either a loop start or ground start line/trunk interface with no intervention by a craftsperson at the site of the UVG circuit.
  • the UVG card 140 supports 13 of the 14 locally switched special services as described in Section 3.1 of the Bellcore specification TA-N T-000909, entitled “Generic Requirements and Objectives for Fiber in the Loop Systems.” The service not supported is Data Inward Dial (DID) .
  • DID Data Inward Dial
  • FIG. 2 A block diagram of the BNU 110 shown in FIG. 1 is illustrated in FIG. 2.
  • the BNU 110 contains a
  • BNPS Broadband Network Unit Power Supply
  • the BNU 110 further contains a BNU Common Control (BNCC) 800 which receives signals from optical fiber 200 at an optical connector 844.
  • BNCC 800 contains the circuitry to send and receive optical signals, as well as a microprocessor and associated software to communicate with the BDT 100 and control the UVG cards 140.
  • the BNU 110 can contain UVG cards 140 which further contain a dual line UVG circuit 812.
  • the dual line UVG circuit is further illustrated in FIG. 3.
  • the BNU 110 can also contain UVG+ circuits 818 which may be a
  • UVG/coin circuit 816 such as the one shown in FIG. 5, a UVG/ISDN circuit 814 such as the one shown in FIG. 6, a UVG/special services circuit, or a UVG/T1 circuit.
  • a first embodiment being a BNU-8 which nominally serves 8 residences 175 and can contain up to two insertable UVG cards 140, two insertable UVG+ cards 141 or a combination thereof.
  • BNU 110 An alternate embodiment of BNU 110 is a BNU-16 which nominally serves 16 residences 175 and can contain up to four insertable UVG cards 140, four insertable UVG+ cards 141 or a combination thereof.
  • the UVG cards 140 may have from one to four dual line UVG circuits 812, and the UVG+ card 141 may have one UVG/coin circuit 816 with the remainder of the circuits being UVG circuits 812, or it may have one UVG/ISDN circuit 814 with the remainder of the circuits being UVG circuits 812. Hex cards which have three dual line UVG circuits 812 are believed to be the most cost effective, as are hex cards with two dual line UVG circuits 812 and one UVG/coin circuit 816, or hex line cards with two dual line UVG circuits 812 and one UVG/ISDN circuit 814.
  • Tables I and II illustrate the services supported by a BNU-8 and BNU-16 respectively with various combinations of hex or quad UVG and hex or quad UVG+ cards. From these tables it can be seen that the use of UVG+ cards allows the IDSN or coin penetration supported to vary from 0% to 25%. This can be accomplished with an inventory of no more than 6 cards: hex and quad UVG cards 140, hex and quad UVG+ cards 141 containing one coin/UVG circuit 816, and hex and quad UVG+ cards 141 containing one ISDN/UVG circuit 814.
  • the UVG penetration supported exceeds 100% when some number of subscribers request a second telephone line for a UVG service. For this reason greater than 100% penetration occurs in Tables I and II.
  • the UVG card 140 illustrated in FIGS. 2 and 3 provides POTs service to a number of residences 175 served by a BNU 110, and can provide this service through a Loop Start or Ground Start line/trunk interface. Typically, 6 subscriber voice circuits
  • UVG card 140 (POTs lines) are served from a UVG card 140.
  • the UVG card 140 contains three dual line UVG circuits 812 such as the one illustrated in FIG. 3.
  • UVG card connectors 860 allow connection of the UVG card to backplane interconnects 808 which provide connectivity to the BNCC 800.
  • the backplane interconnects 808 provides connections to a number of signals including data buses which contain telecommunications data for subscribers as well as control information from the BDT 100 or the BNCC 800, and power and ground for the UVG card itself.
  • the UVG card contains a common control bus signal 882 which connects a Telephony Interface Unit Application Specific Integrated Circuit (TIUA) 880 to BNCC 800.
  • TIUA 880 provides the time division multiplexing functions, state machine functions, and general control functions for the generation of a voice signals in conjunction with the other components of UVG circuit 812.
  • EEPROM886 is used in conjunction with TIUA 880 for the storage of operational data required when UVG card 140 is initially powered.
  • each UVG card 140 also includes a microcontroller and SRAM. These are indicated respectively by reference characters 884 and 887.
  • Microcontroller 884 may be implemented using generally available products such as for example a Motorola 68HC11D3, and a suitable design choice for SRAM 887 is a 32K x 8 SRAM.
  • a suitable SRAM for this purpose is an Integrated Devices Technology SRAM denoted IDT 712565A. Of course other manufacturer's devices having the indicated source capacity may also be used as a substitute.
  • a ringing generator 890 is included on the UVG card 140, which is capable of providing 40 V RMS into a 5 ringing equivalent (REN) load.
  • Ringing generator 890 is controlled by a digital pulse train 892 from TIUA 880, and receives a -130 V signal 894. The output of the ringing generator is ringing voltage 896.
  • a Pulse Code Modulated (PCM) bus 883 and serial bus 885 transfer signals to and from TIUA 880 to subscriber line audio circuits.
  • a single component known as a dual audio line subscriber audio circuit is used to provide a first audio line subscriber audio circuit 900 and a second subscriber line audio circuit 902 in dual line UVG circuit 812.
  • the Advanced Micro Devices' product denoted AM79C031, known by its trademarked name as DSLACTM is a suitable design choice.
  • DSLACTM refers generically to a dual subscriber line audio circuit.
  • An alternate design choice for a dual audio line subscriber audio circuit is the Siemens SiCoFi device.
  • the DSLACTMs are connected to a Subscriber Line Interface Circuit (SLIC) 906.
  • SLIC Subscriber Line Interface Circuit
  • each SLIC In addition to generating the voice circuit interface for basic telephone service, each SLIC also performs loop sense and ring trip detection, tip and ring polarity reversals, provides ring delay drivers and provides a battery switch function to allow two different battery voltages to be used.
  • Subscriber line interface circuits 906 may be implemented utilizing commercially available devices such as the Advanced Micro Devices product denoted AM7949.
  • a solid state relay 910 is used in each subscriber circuit to allow the application of the ringing voltage 896 through a 100 ⁇ ringing resistor 898, as well as for providing metallic test access from the test in bus 912 and test out bus 914 toward the communications channel formed by the UVG circuit and toward the twisted pair drop cable 260.
  • AT&T part number ATTL7583 is a suitable design choice for solid state relay 910.
  • a transient over-voltage protector 918 is used to protect the solid state relay 910 from excessive voltages.
  • a suitable design choice for the transient over-voltage protector 918 is the Teccor P2103 200 V Sidactor.
  • Protection resistor 920 consists of two resistors, one in series with the tip (T) line 266 and on in series with the ring (R) line 268 which together form the twisted pair drop cable 260.
  • the protection resistors serve to protect the UVG circuit from overvoltages, in particular overvoltages due to lightning strikes. Thick film or wirewound fusible protection resistors are typically used.
  • a suitable design choice for a protection resistor in protection resistor 920 is a 50 ⁇ thick film resistor on a ceramic substrate.
  • a gas tube or carbon block device at the premises is used in conjunction with the transient over-voltage protector 918 and protection resistor to provide over- voltage protection.
  • Protection resistor 920 presents sufficient resistance such that in the event of a lightning strike the voltage at the premises will remain sufficiently high to activate the gas tube or carbon block in addition to activating transient over- voltage protector 918.
  • the UVG/ISDN circuit 814 is illustrated in FIG. 4.
  • the circuit can provide ISDN Basic Access using 3-DS0 or 4 :1 multiplexing.
  • the interface to the subscriber is a U-interface operating over two wires at a data rate of 160 kb/s full duplex.
  • the PCM bus 883 interconnects the TIU ASIC 880 with the U transceiver 862.
  • the U transceiver 862 provides basic ISDN Basic Access functionality as described in the American National Standards Institute Tl.601-1991 specification.
  • a suitable design choice for the U transceiver 862 is the Siemens ISDN Echocancellation Circuit IEC-Q 2091.
  • the U transceiver 862 is connected to the 4-2 wire hybrid 864 which converts half duplex transmission to full duplex transmission at the U interface.
  • the 4-2 wire hybrid 864 can be realized using resistors and capacitors or with a single IC such as the Pulse Engineering PE36005W single chip hybrid.
  • the 4-2 wire hybrid is connected to the transformer 865.
  • a suitable design choice for the 4-2 wire hybrid is the Pulse Engineering PE-65575 line transformer.
  • the transformer 865 is connected to a solid state relay 910 which provides access for the test in bus 912 and test out bus 914. Switching in and out of ringing is not required in the ISDN application.
  • a transient over-voltage protector 918 is used to protect the solid state relay 910 from excessive voltages.
  • a suitable design choice for the transient over-voltage protector 918 is the Teccor P2103 200 V Sidactor.
  • a Positive Temperature Coefficient (PTC) device 866 is used to protect the circuit from excessive currents.
  • PTC Positive Temperature Coefficient
  • the UVG/coin circuit 814 is illustrated in FIG. 5. Operation of the UVG/coin circuit 814 is similar to that of the UVG circuit 812 with the addition of coin check/control 872 which permits the application of the four coin voltages: +48V, 874; -48V, 876; +80V, 878; and -80V, 879. These voltages are used to control the functions of coin collect, coin refund, coin presence check, and coin base amount check, and keypad disable. The voltages 874, 876, 878 and 879 are applied via the solid state relay 910.
  • FIG. 6 illustrates a method in which special services are delivered from BNU 110 by the use of a Tl hybrid card A610, which includes POTs circuits and one Tl circuit.
  • the Tl circuit is used to provide a Tl signal containing 24 DSO's to a Special Service Unit-8 (SSU-8) A620, which has plug-in cards for special services.
  • SSU-8 Special Service Unit-8
  • the special services are then provided using a telecommunications link A618 and appropriate Customer Premises Equipment (CPE) A630.
  • CPE Customer Premises Equipment
  • delivery of special services is accomplished by providing DSO channels to BDT 100 either by means of a D4 signal A604 which contains up to 24 special services circuits, or by using a Central Office Terminal Channel Bank A600 which receives unbundled specials signals A602 and forms a DSl signal A601. Signals are transported to BNU 110 via optical fiber 200.
  • Tl hybrid card A610 provides a Tl signal over a four-wire twisted pair loop A623 to a Special Service Unit-8 (SSU-8) A620.
  • SSU-8 A620 accepts whatever type of special services card is needed to provide the special service.
  • Telecommunications link A618 can be twisted pair, coaxial cable, or any other type of telecommunications link required for the special service.
  • the special service unit shown in FIG. 6 as SSU-8 A620 can be located inside of a building, or can be located outside on a telephone pole or in any other suitable location for network equipment.
  • a number of existing channel banks can be used as special service unit, and the size of the special service unit can vary from a two-card unit up to a 24 card unit. The construction of channel banks is well understood by those skilled in the art.
  • Tl hybrid card A610 contains four POTs circuits, and can provide POTs services to residences 175 using via twisted pair drop cable 260. In the residence 175 the in-home twisted pair cable connects the telephone 185 to the twisted pair drop cable 260.
  • FIG. 7 illustrates the Tl hybrid card A610 in further detail, showing four POTs circuits, P0TS1 A720a, POTS2 A720b, POTs3 A720c, and P0TS4 A720d.
  • a DSl circuit A730 is present to transmit and receive the Tl signal to and from SSU-8 A620.
  • the DSl common daughter board A710 plugs into the mother board A709 and provides the interface function to the BNCC 800.
  • the DSl common daughter board A710 contains a Tl ASIC A818, Tl microprocessor A822, external Tl Static Random Access Memory (Tl SRAM) A826, and Tl ⁇ P SRAM A824.
  • a separate processor (microcontroller) is used for the Tl circuit functions in order not to burden the microcontroller 824 which is used for POTs circuit functions.
  • the common POTs block A740 provides the functions common to all of the POTs circuits. Included in the common POTs block A740 are the microcontroller 884, SRAM 887 TIUA 880, EEPROM 886, and ringing generator 890 illustrated in FIG. 3.
  • the DSl circuit A730 is comprised of the clock adapter A820, framer A816, and Line Interface Unit (LIU) A814.
  • LIU Line Interface Unit
  • FIG. 8 A block diagram of the entire Tl circuit is illustrated in further detail in FIG. 8.
  • the receive pair A810 and transmit pair A812 which form the four- wire twisted pair loop A623 are connected to the Line Interface Unit (LIU) A814.
  • LIU Line Interface Unit
  • a suitable design choice for the LIU A814 is the Level One LXT350 short haul Tl/El Transceiver.
  • a framer A816 performs the framing functions on the received and transmitted signals.
  • a suitable design choice for framer A816 is the BT8360.
  • a clock adapter A820 is used to generate a 1.544 MHz clock A823 from the 4.096 MHz clock A821 which is present on the hybrid Tl card A610.
  • a suitable design choice for the clock adapter is the Level One LXP604 Clock Adapter.
  • the Tl ASIC A818 is used to form the Tl signal from the BNU payload.
  • Tl ASIC A818 is connected to TIU BUS 882 which is connected to BNCC 800 via backplane interconnects 808.
  • the Tl ASIC A818 is responsible for interfacing to backplane interconnects 808 and provides the processor interface and address decoding.
  • TI ASIC A818 stores a 4 frame downstream signaling history and translates upstream and downstream signaling on a per DSO basis.
  • Tl SRAM External Tl Static Random Access Memory
  • Tl SRAM A826 is utilized in conjunction with Tl ASIC A818 for storing 4 signaling frames required for signaling freeze conditions.
  • the Tl SRAM A826 is also used for storing downloaded signaling translation tables.
  • the processor loads the tables via a memory banking method, through Tl ASIC A818.
  • a suitable design choice for the size of Tl SRAM A826 is 32K*8, although only a few hundred bytes of memory may be required in actual operation.
  • a microprocessor A822 is used to configure the various components on the Tl hybrid card A610.
  • a suitable design choice is a Motorola 68HC11D3 microprocessor running at 2MHz.
  • the microprocessor A822 will download code from the BNCC 800 via the data ⁇ link.
  • External ⁇ P Static Random Access Memory ( ⁇ P SRAM) A824 is utilized for storage of program information.
  • ⁇ P SRAM External ⁇ P Static Random Access Memory
  • a suitable design choice for the size of the ⁇ P SRAM A824 is a 128K*8 SRAM, although only 64K is addressable space.
  • the microprocessor A822 performs any necessary alarm monitoring and performance monitoring functions required, along with initialization of the LIU A814, framer A816, and Tl SRAM A826.
  • POTs circuits are placed on a Tl Hybrid Card with one Tl circuit. This is because 2 twisted wire pairs are used for Tl service, and there are 6 pairs available for each UVG card 140, UVG+ card 141, or Tl hybrid card A610. In an alternate embodiment, 5 POTs circuits can be placed on a card with one Tl circuit. This alternate embodiment requires connections for an additional twisted pair In an alternate embodiment the special service circuits can be placed on a UVG+ card 141, in a manner similar to the placement of ISDN or coin circuits. The construction of the special service circuits are well known to those skilled in the art. In this alternate embodiment, a special services unit is not required, since the special services circuit is deployed directly in BNU 110.
  • a BNU 110 which serves 8 residences 175 with two hex UVG cards and achieve 150% penetration for UVG services by supporting 12 UVG circuits, and later replace one of the UVG cards with hex UVG+ card, thus supporting 11 UVG circuits and one coin or ISDN circuit.
  • both hex UVG cards can be replaced with two UVG+ cards to support 10 UVG lines and 2 coin/ISDN lines or 1 coin and 1 ISDN line.
  • a BNU 110 could be located in a residential area which contains a small business which requires a lottery circuit, which is a special service circuit.
  • the BNU 110 could be provisioned with one hex UVG card and one Tl hybrid card, and a special services unit could be deployed in the business or outside the business.
  • a lottery circuit card would be placed in the special services unit, and the business would have the appropriate CPE for lottery services. In this way a special lottery circuit card does not need to be deployed in the BNU.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Interface Circuits In Exchanges (AREA)

Abstract

L'invention concerne un procédé et un appareil offrant des services de télécommunication spéciaux comprenant un réseau numérique de services intégrés (868), un téléphone à pièces (870) et des circuits T1 (a610) sur une carte de ligne (816) qui permet également des communications classiques par téléphone. Dans une configuration de réseau à fibres FTTC, une carte de ligne (816) contenant des circuits pour communications téléphoniques classiques et des circuits pour services spéciaux est utilisée pour obtenir une correspondance statistique étroite entre le nombre nécessaire des circuits de télécommunication conventionnels et spéciaux d'une part et le nombre de circuits disponibles dans l'unité de réseau optique (110).
PCT/US1997/001245 1996-02-06 1997-02-05 Cartes de ligne pour uvg, paiement par pieces, reseau isdn et pour des services speciaux WO1997029585A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU18406/97A AU1840697A (en) 1996-02-06 1997-02-05 Line cards for uvg, coin, isdn, and special services

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US1124296P 1996-02-06 1996-02-06
US60/011,242 1996-02-06
US79527197A 1997-02-04 1997-02-04
US08/795,271 1997-02-04

Publications (1)

Publication Number Publication Date
WO1997029585A1 true WO1997029585A1 (fr) 1997-08-14

Family

ID=26682155

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1997/001245 WO1997029585A1 (fr) 1996-02-06 1997-02-05 Cartes de ligne pour uvg, paiement par pieces, reseau isdn et pour des services speciaux

Country Status (3)

Country Link
AU (1) AU1840697A (fr)
CA (1) CA2244000A1 (fr)
WO (1) WO1997029585A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033489A1 (fr) * 1998-12-02 2000-06-08 Marconi Communications, Inc. Unite de reseau optique adaptable multi-services

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998274A (en) * 1989-12-06 1991-03-05 Bell Communications Research, Inc. ISDN dual bus extension phone system
US5305312A (en) * 1992-02-07 1994-04-19 At&T Bell Laboratories Apparatus for interfacing analog telephones and digital data terminals to an ISDN line
US5418625A (en) * 1991-11-18 1995-05-23 Matsushita Graphic Communication Systems, Inc. Picture image communication apparatus
US5600469A (en) * 1994-10-13 1997-02-04 Nec Corporation Optical network unit implemented with low-cost line interface cards

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4998274A (en) * 1989-12-06 1991-03-05 Bell Communications Research, Inc. ISDN dual bus extension phone system
US5418625A (en) * 1991-11-18 1995-05-23 Matsushita Graphic Communication Systems, Inc. Picture image communication apparatus
US5305312A (en) * 1992-02-07 1994-04-19 At&T Bell Laboratories Apparatus for interfacing analog telephones and digital data terminals to an ISDN line
US5600469A (en) * 1994-10-13 1997-02-04 Nec Corporation Optical network unit implemented with low-cost line interface cards

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000033489A1 (fr) * 1998-12-02 2000-06-08 Marconi Communications, Inc. Unite de reseau optique adaptable multi-services
US6362908B1 (en) 1998-12-02 2002-03-26 Marconi Communications, Inc. Multi-service adaptable optical network unit

Also Published As

Publication number Publication date
CA2244000A1 (fr) 1997-08-14
AU1840697A (en) 1997-08-28

Similar Documents

Publication Publication Date Title
US5883941A (en) HDSL and POTS carrier system
US6259676B1 (en) Upgrading of subscriber connection
US6546089B1 (en) Method and system for supporting a lifeline associated with voice over DSL
US6208637B1 (en) Method and apparatus for the generation of analog telephone signals in digital subscriber line access systems
US6574313B1 (en) Voice over DSL method and system for supporting a lifeline
US6141330A (en) Multiple ISDN and pots carrier system
US6781981B1 (en) Adding DSL services to a digital loop carrier system
US7239627B2 (en) Digital subscriber line services
WO1998034388A9 (fr) Procede et appareil pour faire fonctionner de maniere fiable des cartes universelles telephoniques
US20020101851A1 (en) Method of and apparatus for providing multiple independent voice telephone line circuits using and including a packet voice device
EP0916201A1 (fr) Systeme rnis a plusieurs porteuses
US6047061A (en) Routing call processing communications in a telecommunications system
WO2004070552A2 (fr) Systeme et procede de routage de couche physique
US20040161100A1 (en) System and method for deriving sealing current
WO1997029585A1 (fr) Cartes de ligne pour uvg, paiement par pieces, reseau isdn et pour des services speciaux
US20020018491A1 (en) Plug-in multiplexer
WO2002037819A1 (fr) Dispositif et procede destines a la mise en oeuvre d'une connexion de secours dans un systeme de telecommunication
WO1999021311A1 (fr) Systeme a courants porteurs multiples rnis et pots
US7436849B1 (en) System and method for partitioning a DSLAM network
US6895042B2 (en) Apparatus and method for pre-provisioning of broadband access to subscribers in a telecommunication system
KR100289580B1 (ko) 선로시험을 위한 가입자보드 시뮬레이터
ES2235824T3 (es) Sistema y procedimiento para proporcionar acceso de banda ancha de un sistema de telecomunicacion.
US7016474B2 (en) Reduced cost digital subscriber line (DSL) interface arrangement
US20060262923A1 (en) Communication networks that include a high pass filter circuit for connecting communications wiring at a customer premises location to an outside plant loop and methods of operating the same
MXPA99007033A (en) Method and apparatus for reliable operation of universal voice grade cards

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GE HU IL IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK TJ TM TR TT UA UG UZ VN AM AZ BY KG KZ MD RU TJ TM

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): KE LS MW SD SZ UG AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
ENP Entry into the national phase

Ref document number: 2244000

Country of ref document: CA

Ref country code: CA

Ref document number: 2244000

Kind code of ref document: A

Format of ref document f/p: F

NENP Non-entry into the national phase

Ref country code: JP

Ref document number: 97528534

Format of ref document f/p: F

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase