KR100313571B1 - ADSL modem with POTS splitter - Google Patents

Abstract

An object of the present invention is to provide a POTS splitter built-in ADSL modem that can be connected by using a conventional telephone line without the need to install a separate POTS splitter, without having to re-install a separate wiring at the subscriber side. The present invention is a structure that considers the efficiency and economic efficiency of the system configuration to the maximum, and can implement a satisfactory ADSL service while implementing the maximum data rate, the network distinction is clear, and there is no need to separate new wiring at the subscriber end, modem and There is no need to buy a splitter. So you don't have to worry about splitting another vendor's splitter for one vendor's modem. In addition, the present invention can receive satisfactory POTS service even when the modem is unplugged. In addition, the present invention does not create a separate new POTS splitter board in the telephone station ADSL system, and thus is widely applied to an xDSL network access system in which the demand and service are not only very large, but the demand and service are rapidly generated in recent years.

Description

ADSL modem with POTS splitter {ADSL modem with POTS splitter}

The present invention relates to a xDSL (Multi Digital Subscriber Line) subscriber modem with a built-in Plain Old Telephone Service (POTS) splitter function. In particular, there is no need to install a separate POTS splitter and re-construct a separate wiring at the subscriber side. The present invention relates to an xDSL subscriber modem with a built-in POTS splitter that can be connected using an existing telephone line.

Conventional splitters are often released as separate products from modems, and thus, the cost burden at the subscriber end has been pointed out as a big problem. In addition, there are many cases where a modem and a splitter company are different so that a suitable splitter for a vendor's Asymmetric Digital Subscriber Line (ADSL) modem has to be obtained. In addition, when the splitter is placed inside the modem, the telephone line has to be rewired using RJ31X. Therefore, it is not economically utilized due to the increase of the modem installation cost. In such a case, the network separation is blurred and the modem is used by using an active splitter. If you don't plug it in, you can't do POTS service properly. In addition, the ADSL-LT (Line-Termination) modem that is plugged into the self in the telephone station also requires a separate splitter board has a problem that a new connector is used.

Accordingly, an object of the present invention is to provide an ADSL modem with a built-in POTS splitter that does not need to install a separate POTS splitter and can be connected by using a conventional telephone line without having to reconstruct a separate wiring at the subscriber side.

1 is a block diagram of a general ADSL system.

2 is a detailed block diagram of the ADSL central station in FIG.

3 is a block diagram of a built-in POTS splitter ADSL subscriber modem according to an embodiment of the present invention.

4 is a block diagram of a built-in POTS splitter ADSL subscriber modem according to an embodiment of the present invention.

(Explanation of symbols for the main parts of the drawing)

15: network interface unit 17a, 17b: RJ11 jack

25: NMS 27,47: 6 conductor code

35: control and management unit 37: ADSL modem supporting ATM interface

45: ADSL-LT 55: splitter

57: ADSL modem with Ethernet interface

POTS splitter built-in ADSL modem according to the present invention for achieving the above object, in the ADSL modem of the ADSL broadband system implementing the ATM interface,

It consists of a RJ11 jack of the telephone network interface and a first RJ11 jack connected to the Unshielded Twisted Pair (UTP) connection line through the 6 conductor cord, and a second RJ11 jack connected to the telephone line via the RJ11 jack of the telephone and the 6 conductor cord. POTS (Plain Old) provides signals input via the telephone network interface to the DMT transceiver via the 116 HP HPF and 1.1 MHz low pass filter (LPF) from the ADSL analog processing unit, and also via the 4 kHz LPF to the telephone. Telephone Service) characterized in that it further comprises a splitter.

POTS splitter built-in ADSL modem according to the present invention for achieving the above object, in the ADSL modem of the ADSL broadband system that implements the Ethernet interface,

It consists of a RJ11 jack of the telephone network interface and a first RJ11 jack connected to the Unshielded Twisted Pair (UTP) connection line through the 6 conductor cord, and a second RJ11 jack connected to the telephone line via the RJ11 jack of the telephone and the 6 conductor cord. The signal input through the telephone network interface is provided to the DMT transceiver via 116 ㎑ HPF (High Pass Filter) and 1.1 MHz Low Pass Filter (LPF) at ADSL analog processing unit, and 4 LP LPF via telephone. It is characterized in that it further comprises a Plain Old Telephone Service (POTS) splitter for connecting.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates a network configuration of an ADSL broadband access system according to the present invention.

An important feature of ADSL systems is that they can provide high-speed digital services simultaneously without interfering with analog telephone service (POTS) over existing twisted pair copper networks.

It is a technology that increases bandwidth to simultaneously transmit multimedia information such as voice, graphic, and video while using existing telephone line. Therefore, it is receiving attention as a service network that can deliver multimedia information to subscribers without incurring network installation costs.

Thus, new services can be created that can be provided to telephone subscribers such as high speed Internet, online access and telecommuting, and Video On Demand (VOD). In addition, there is no need to install a new line, so it is possible to implement the service more economically and faster than using other systems.

The ADSL line coding schemes include Discrete Multi-Tone (DMT) and Carrierless Amplitude (CAP). The line coding method is a technology that modulates and demodulates digital data and transmits it on a twisted pair. Among the DMT methods set by the American National Standards Institute (ANSI), the downlink rate is up to 8Mbps and an uplink rate of about 640kbps. You can pass data to

The broadband access system proposed in the present invention has advantages such as flexibility of bandwidth used and service usage with various traffic characteristics through ATM-based transmission.

The basic block of the ADSL broadband access system according to the embodiment of the present invention is an ADSL central station connected to an ATM switch 3 connected to an Internet network 1 through an ISP 2 and a public switched telephone network (PSTN) 4. (Central Office) 5, ADSL network access system and subscriber premises connected to the ADSL central station (5) by copper pair, connected to the telephone (6) and PC (8) located in the Digital Loop Carrier (DLC) It consists of an ADSL subscriber modem 7 located in the (home, office).

The operation of the ADSL broadband access system configured as described above is described in detail as follows.

The ADSL network access system is connected to a backbone network, that is, a data backbone network and an ATM network, and the PSTN network 4 is connected to a subscriber line. The interface between the PC (8) or the TV, the subscriber terminal, and the ADSL subscriber system uses the ATM Forum's 25 Mbps or Ethernet 10BaseT connection and does not affect the subscriber's use of the telephone.

The POTS splitter mixes analog telephony services and digital ADSL services so that the original telephony service and the new high-speed service are mixed on the twisted pair.

ADSL network access system connects ATM 155Mbps OC-3c or ATM 45Mbps T3 from the broadband network to the uplink network access board, and the input data is multi / demultiplexed or switched on the ATM cell bus. Modulated data via the board's ADSL transceiver is mixed on the telephone line on the POTS splitter and sent to the subscriber.

The telephone line connected to the subscriber is separated from the telephone service data through the POTS splitter in the subscriber modem, only the modulated ADSL data is input to the ADSL subscriber system, the ADSL transceiver extracts the ADSL demodulation and ATM cell data from the ADSL frame, If the subscriber interface to the TV is ATM Forum 25 Mbps, it is connected to the PC 8 or TV via an UTP (Unshield Twisted Pair-3) cable via an ATM Forum 25 Mbps I / F TC + PMD device.

If the subscriber interface to the PC (8) or TV is Ethernet 10BaseT, the extracted ATM cell data is performed by performing segmentation & reassembly (SAR) function of ATM Adaptation Layer and VC-based demultiplexing to perform Ethernet packet data. And then connected to the PC via the MAC controller and Ethernet line driver.

The upstream data transmitted from the subscriber via the ADSL subscriber system via the telephone line is separated from the telephone data in the POTS splitter function block of the ADSL network access system, and the separated telephone service data is connected to the central office telephone exchange.

Separated ADSL upstream data is extracted ATM cell data from ADSL frame through ADSL transmitter / receiver of ADSL-LT board of ADSL network access system, then multiplexed on ATM cell bus and connected to broadband network through uplink network access board .

The ADSL network access system controls and operates the ADSL-LT board and the uplink network access board, which are the ADSL subscriber boards, as well as the control / operation that collects subscriber information and network-related status information from these boards and delivers them to the ADSL network access system. The board operates under the SNMP agent protocol.

2 is a block diagram of an ADSL-LT, which is an ADSL subscriber interface board in an ADSL network access system.

ADSL-LT 45 is a cell bus interface control device that performs ATM cell multiplexing / demultiplexing on a cell bus, and multiplexes one cell stream into multiple cell streams to accommodate multiple subscriber interfaces within a board. Cell multiplexing device (Cell MUX) with demultiplexing, Transmission Convergence Sublayer of ATM physical layer, ie Idel cell insertion and removal, cell payload scramble / descramble, cell delineation, An ATM handler device that performs HEC checking and generation and converts an ATM UTOPIA interface into a modem byte interface, an ADSL transceiver that performs ADSL frame forming, modulation / demodulation, and the like, an ADSL line driver, and the cell bus interface Microphones controlling control devices, cell multiplexing devices, ATM handler devices, ADSL transceivers, and ADSL line drivers, respectively It consists of a processor.

The ADSL-LT board is a modem including a splitter in a telephone station. The ADSL-LT board does not require a separate splitter board, and the modem includes a splitter function. Splitters with passive components do not need a separate power supply.

The operation of the ADSL network access system configured as described above is described in detail as follows.

First, when constructing a self-service service system, it connects to the broadband network through the uplink network interface unit 15 within the self, and does not need to insert a separate POTS splitter self in addition to the modem suitable for the number of subscribers supported by the self. A self unit system is constructed. The control and management unit 35 communicates contents of control and management information through the Ethernet interface to the ADSL network management system, and a command line interface through a terminal for system initialization, configuration, and control through a serial interface. ). For control line interface, use serial interface such as DB25 or DB9 RS-232.

On the other hand, in the case of a large number of subscribers, if the system is configured in units of racks, each ADSL line self per rack is composed of about four ADSL lines, and one separate rack uplink network interface unit 15 is provided per rack. In addition, the network interface unit 15 performs multiple / demultiplexing to the uplink network interface unit 15 of each self.

Similarly, there is one separate control / management unit 35 per rack, and transmits and collects control / management information from the control / management unit 35 of each self in a ring-shaped structure through a serial interface to Ethernet to ADSL network management system. It connects through the interface and provides the control line interface through the serial interface to the control terminal. The separate uplink network interface unit 15 and the control / management unit 35 necessary for configuring the rack unit system may be present at any independent position in the rack.

The uplink network interface 15 in the ADSL subscriber line self is included in the network block shown in FIG. 2, where the input high speed ATM cell data is multiplexed / demultiplexed onto each ADSL-LT 45 board on the ATM cell bus. And a cell bus interface control device to perform the operation.

The splitter inside the modem at the telephone station passes through the function of a DMT transceiver and sends an ADSL signal over the 25kHz HPF to the telephone line. Before the telephone line is connected to the telephone, the telephone is routed through the LPF, which only lowpasses the telephone signal below 4 kHz. The same is true for telephone signals from the telephone company to the PSTN network. This case applies to both modems that support ATM interfaces and modems that support Ethernet interfaces.

3 illustrates a connection structure of an ADSL modem having a splitter function at a subscriber end supporting an ATM interface.

The RJ45 connection (not shown) provided inside the ADSL modem 37 with a splitter function and the RJ45 of the ATM card 18 in the PC 8 are connected by an UTP (Unshielded Twisted Pair) cable. The RJ11 jack 17a coming from the network interface of the telephone station and the ATM interface supporting ADSL modem 37 are connected by using a UTP connection line through a six conductor cord 27, and the ATM interface supporting ADSL modem ( The connection between 37 and telephone 6 is connected using a telephone line via six conductor cords 47.

4 is a diagram illustrating a connection structure of an ADSL modem having a splitter function at a subscriber end supporting an Ethernet interface.

The RJ45 connection (not shown) provided inside the ADSL modem 57 having the splitter function and the RJ45 of the Ethernet card 28 in the PC 8 are connected by an UTP (Unshielded Twisted Pair) cable. The RJ11 jack 17a coming from the network interface of the telephone company and the Ethernet interface supporting ADSL modem 57 are connected through a six conductor cord 27 using a UTP connection line, and the Ethernet interface supporting ADSL modem ( The connection between 57 and the telephone 6 is connected using a telephone line via a six conductor cord 47.

Although the present embodiment has been described in application to an ADSL broadband subscriber station modem system, in addition to telephone stations such as digital subscriber access equipment such as xDSL, as well as VDSL (Very High High Rate DSL) and HDSL (High Bit Rate DSL) network access systems, Any system having a single broadband access link such as a subscriber-end modem can be applied and implemented, and it is applied to a system that is intended to configure a modem economically and conveniently and flexibly.

The present invention is a structure that considers the efficiency and economic efficiency of the system configuration as much as possible, can implement a satisfactory ADSL service while implementing the maximum data rate, and the modem and the splitter can be used without the necessity of separate wiring and the need for new wiring at the subscriber end. There is no need to buy it separately. So you don't have to worry about splitting another vendor's splitter for one vendor's modem.

In addition, the present invention can receive satisfactory POTS service even when the modem is unplugged.

In addition, the present invention does not create a separate new POTS splitter board in the telephone station ADSL system, and thus is widely applied to an xDSL network access system in which the demand and service are not only very large, but the demand and service are rapidly generated in recent years.

Claims (8)

delete In an ADSL modem of an ADSL broadband system that implements an ATM interface, It consists of a RJ11 jack of the telephone network interface and a first RJ11 jack connected to the Unshielded Twisted Pair (UTP) connection line through the 6 conductor cord, and a second RJ11 jack connected to the telephone line via the RJ11 jack of the telephone and the 6 conductor cord. POT (Plain Old Telephone), which provides signals input via the telephone network interface to the DMT transceiver via 116kHz HPF and 1.1MHz LPF (Low Pass Filter) from the ADSL analog processing unit Service) Splitter built-in PSL modem is characterized in that it further comprises a splitter. delete The method of claim 2, The ADSL modem supporting the ATM interface is a PTS splitter built-in ADLS modem, characterized in that connected to the RJ45 and UTP connection line of the ATM25 card in the PC. delete In an ADSL modem of an ADSL broadband system that implements an Ethernet interface, It consists of a RJ11 jack of the telephone network interface and a first RJ11 jack connected to the Unshielded Twisted Pair (UTP) connection line through the 6 conductor cord, and a second RJ11 jack connected to the telephone line via the RJ11 jack of the telephone and the 6 conductor cord. To the DMT transceiver via the 116kHz HPF (High Pass Filter) and 1.1MHz Low Pass Filter (LPF) from the ADSL analog processing unit to the DMT transceiver. A PSL splitter built-in ADSL modem further comprises a POTS (Plain Old Telephone Service) splitter. delete The method of claim 6, The ADSL modem supporting the Ethernet interface is a PSLS built-in ADSL modem, characterized in that connected to the RJ45 and UTP connection line of the Ethernet card in the PC.