JP2002158795A - Interconnection system for communication network and charging method for communication charge utilizing the system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase access channels to large amount users such as providers at a low cost. SOLUTION: An interface 8 that assigns time slots of 64 kbps channels among 4 TTC 2M signals, a common line signal 7 CS and 5 sets of 1.5 Mbps primary group speed interfaces extracted from a relay channel interface of an in-station switch 10 is placed in the vicinity of the in-station switch 10 and a dialup router 43 that converts a protocol of the primary group speed interface into the TCP /IP protocol is placed in the vicinity of the interface 8 to connect an electric communication network 1 and a provider 4 by using the TCP/IP protocol. Thus, the channels interconnecting a terminal 2 and the provider 4 can be increased without the need for increasing in-station switches or the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interconnection system for a communication network including a public telephone line network, and more particularly, to a large user who needs to have a large number of connection lines and a call connection for the large user. The present invention relates to an interconnection scheme for a communication network for interconnecting with a customer terminal desiring the above, and a method of charging a communication fee using the scheme.

[0002]

2. Description of the Related Art Large users, such as Internet service providers (hereinafter simply referred to as "providers") and telephone centers for receiving ticket reservations, etc., require a large number of telephone lines for one or more representative telephone numbers. Need. FIG. 7 is a configuration diagram of a conventional communication network for Internet connection centered on a provider.

The telecommunications network 1 includes a fixed telephone network, a mobile telephone network and the like. Terminals (for example, personal computers) 2 installed in each home or office are connected to the telecommunications network 1 via a subscriber line 3 respectively. It is connected. The provider 4 is connected to the telecommunications network 1 by a line 5, and further connected to an Internet network (described as “IP network” in the figure) 6 by a dedicated communication line 7.

Normally, as the line 5, a primary group speed interface (specifically, an ISN net 1500 provided by Nippon Telegraph and Telephone Corporation of East and West (hereinafter referred to as "NTT companies")) and the like are used. In the primary rate interface, each subscriber line has 64 64 kbps information (voice) channels as well as 23 B channels.
One D channel (23B), which is a kbps signal channel
+ D) or 24 B channels (24B) can be used. This line 5 is usually an optical fiber cable.

[0005] In the provider 4, a DSU (Digital Line Connection Device) 41, a dial-up router 43, and a router 45 are arranged in this order from the telecommunication network 1 side.
A communication line 42 is provided between the dial 41 and the dial-up router 43.
The communication line 44 connects the dial-up router 43 and the router 45. Dial-up router 43
Has a built-in modem function, and performs mutual signal conversion between the primary rate interface and the TCP / IP protocol. There is a certain closed system between the dial-up router 43 and the router 45, and various servers owned by the provider 4 are connected here. The router 45 has a function of connecting this system to the IP network 6 outside the system.

The above configuration operates as follows when each terminal 2 requests a dial-up connection. The local exchange (not shown) included in the telecommunications network 1 receives a call connection request from the terminal 2, checks the blocked state of the line 5, makes a call if the line 5 is free, and makes a predetermined call from the provider 4. If there is a response, connect. Terminal 2
Is transmitted to the provider 4 via the dial-up router 43 and converted into a TCP / IP protocol. When connection to the external IP network 6 is required, the signal is transmitted to the IP network 6 via the router 45. Is sent. If the processing can be performed inside the provider 4, for example, if the access is to a Web server owned by the provider 4, the processing is blocked by the router 45 and the external IP
It does not flow to the net 6. It should be noted that there is data that enters the provider 4 from the IP network 6 through the router 45.

[0007]

In recent years, with the rapid spread of the Internet to ordinary households, there has been a tendency for a shortage of lines for interconnecting a provider and a customer who has contracted with the provider. For this reason, for example, during the time of the late-night time flat-rate connection service (so-called tele-hodai) provided by NTT companies, connection requests from customers are concentrated, and the line is frequently blocked and busy. Since such a decrease in the connection opportunity leads to a decrease in the trust of the provider, many providers require NTT companies to increase the number of lines for connection.

However, in order to increase the number of lines 5 between the telecommunications network 1 and the provider 4, not only laying an optical fiber cable but also correspondingly increasing the in-station equipment such as an exchange. Required and costly. Therefore, large users (in this case, provider)
However, it is difficult to respond to new additions easily unless there is a guarantee that they will be used for a relatively long time. In addition, since such a large increase in equipment is required, the fact is that the response to the request for additional lines is delayed.
On the other hand, competition between providers may be intensifying,
In particular, there is a dilemma that it is difficult for small and medium-sized providers to guarantee the long-term use of new lines to NTT companies.

The present invention has been made in view of such a situation, and its main object is to provide a large user such as a provider and a customer who wants to call the large user at a relatively low cost. It is an object of the present invention to provide a communication network interconnection scheme which enables mutual communication between the communication networks. It is another object of the present invention to provide a communication fee charging method that can significantly reduce connection costs by utilizing such an interconnection scheme.

[0010]

The above-mentioned connection form between the telecommunications network and the large-scale user guarantees various services provided by NTT companies in addition to ordinary telephone calls for each communication channel. Is what you do. However, for a connection to a specific customer such as a provider or a telephone center, it is not always necessary to guarantee all such services, and the functions thereof should be considerably limited. The present inventor pays attention to such a point, and uses a trunk line used for transmission between offices instead of using a subscriber line as in the related art when connecting an intra-office exchange and a large user. By utilizing transmitted and received signals, the inventor has conceived of interconnecting a large number of lines at a low cost for a specific application or function.

That is, a first communication network interconnection system according to the present invention comprises a telecommunications network, a plurality of terminals connected to the telecommunications network, and a large user also connected to the telecommunications network. An interconnection system for interconnecting the plurality of terminals and the large-scale user with each other, comprising: a) an exchange belonging to the telecommunications network and connected to the plurality of terminals; b) A multiplexed call path signal and common line signal taken out of the exchange, and an ISDN 1500 signal conforming to the primary rate interface are mutually converted, and the call path signal and the call channel of the ISDN 1500 signal are converted. , The time slots are rearranged with each other, and the common line signal is transmitted to the ISDN 15.
First signal format conversion means for distributing to the control channel of the 00 signal or conversely, and c) a signal conforming to said primary rate interface;
A second signal format conversion means for mutually converting between a signal compliant with the TCP / IP protocol and the first and second signals.
Is disposed close to the exchange, and
It is characterized in that a telecommunications network and a large-scale user are interconnected via a transmission path conforming to the CP / IP protocol.

[0012] Further, a second communication network interconnection system according to the present invention provides a telecommunication network, a plurality of terminals connected to the telecommunication network, and a large user also connected to the telecommunication network. An interconnection system for interconnecting the plurality of terminals and the large-scale user with each other, comprising: a) an exchange belonging to the telecommunications network and connected to the plurality of terminals; b) A multiplexed call path signal and common line signal taken out of the exchange, and an ISDN 1500 signal conforming to the primary rate interface are mutually converted, and the call path signal and the call channel of the ISDN 1500 signal are converted. , The time slots are rearranged with each other, and the common line signal is transmitted to the ISDN 15.
First signal format conversion means for distributing to the control channel of the 00 signal or vice versa, wherein the first signal format conversion means is disposed close to the exchange, and the ISDN
It is characterized in that a telecommunications network and a large-scale user are interconnected via a 1500 transmission line.

[0013] A third communication network interconnection system according to the present invention comprises a telecommunications network, a plurality of terminals connected to the telecommunications network, and a large user also connected to the telecommunications network. An interconnection system for interconnecting the plurality of terminals and the large-scale user with each other, comprising: a) an exchange belonging to the telecommunications network and connected to the plurality of terminals; b) A multiplexed channel signal and a common channel signal extracted from the exchange, and an ISDN 1500 signal or a signal equivalent thereto conforming to the primary rate interface are mutually converted, and the channel signal and the signal are converted. IS
The time slots are rearranged mutually by associating the DN 1500 signal or the equivalent signal with the communication channel, and distributing the common line signal to the control channel of the ISDN 1500 signal or the equivalent signal or vice versa. C) modulating the ISDN 1500 signal or a signal equivalent thereto into a digital subscriber line transmission wideband signal that can be superimposed on an analog subscriber line voice call signal;
Superimposing the modulated signal on an analog subscriber line connecting a telecommunications network and a large user, and conversely separating and demodulating a similar wideband signal received through the analog subscriber line to the first signal format And a broadband signal superimposing / separating means for passing to the converting means, wherein the telecommunications network and the large-scale user are interconnected via the analog subscriber line.

In any one of the first to third interconnection schemes according to the present invention, when a terminal requests a call connection to a large user and performs connection, the exchange transmits a signal to another station. In the same procedure as above, a call path signal is transmitted to the multiplexed call path, and a control signal (common line signal) such as a telephone number is transmitted to a common line. These signals are converted by a first signal format conversion means disposed close to the exchange into an ISD conforming to the primary rate interface.
The signal is converted into an N1500 signal or a signal corresponding thereto.

In a first interconnection scheme, an ISDN 1500 signal conforming to this primary rate interface is transmitted to a second
Is converted into a signal conforming to the TCP / IP protocol by the signal format converting means, and this signal is sent to a large user via a transmission path. In the second interconnection scheme, an ISDN 1500 signal conforming to the primary rate interface is sent to a large user via a transmission path suitable for passing a wideband signal such as an optical fiber.

In the third interconnection system, an ISDN 1500 signal or a signal corresponding thereto conforming to the primary rate interface is modulated by a wide band signal superimposing / separating means into a wide band signal for digital subscriber line transmission. It is mixed into the analog subscriber line connecting the communication network and the large user and sent to the large user. Here, the broadband signals for digital subscriber line transmission include HDSL (high-speed digital subscriber line), SDSL (symmetric digital subscriber line), ADSL (asymmetric digital subscriber line), and VDS.
It can be an xDSL signal containing L (ultra high speed digital subscriber line) or the like. That is, in xDSL, a digital data signal can be transmitted without disturbing the voice communication signal by using a wide frequency band higher than the frequency band of the voice communication signal.

In the first and second interconnection schemes, the meaning of "disposed close to each other" does not necessarily mean that the distances are short, but belongs to the telecommunications network. Is located in a state that can be regarded as belonging to or substantially belonging to a telecommunications network, and cannot be regarded as being located on the side of a large user. Therefore, the owner or manager of the first signal format converter may or may not be the same as the owner or manager of the exchange.

Further, in the second interconnection method, a large user can use an ISD conforming to the primary rate interface.
A configuration may be provided that includes second signal format conversion means for mutually converting between the N1500 signal and a signal conforming to the TCP / IP protocol. According to this configuration, the large user can use, for example, TCP / I, as in the first interconnection method.
It can be connected to LAN standardized by P protocol.

In one embodiment of such an interconnection scheme, the large-scale user is an Internet service provider, and the Internet service provider is
It may be configured to include a selective connection unit for connecting a signal conforming to the CP / IP protocol to the IP network. The selective connection means is, for example, a router.

In one embodiment of the second interconnection system, the large-scale user has a telephone center (also referred to as a call center) equipped with a plurality of terminals such as telephones.
In this case, a private branch exchange that distributes a voice channel of a signal conforming to the primary rate interface to a plurality of terminal lines is provided.

According to the interconnection system of the first to third communication networks according to the present invention, unlike an ordinary exchange connection between subscriber lines, an exchange uses a plurality of terminals connected to the subscriber line for another. Since the first signal format conversion means does not require a large-scale hardware amount, the connection between the telecommunications network and the large-scale user is established. When expanding, it is possible to reduce the increase in equipment including the exchange. Therefore, as a telecommunications carrier, it is possible to quickly respond to a request from a large user such as a provider or a telephone center to add a line. On the other hand, large users can quickly add a line at a relatively low cost, so that useful services can be provided to customers in a timely manner.

According to the third communication network interconnection system, a large amount of data can be transmitted between a telecommunication network and a large user using a conventional analog telephone line.
Existing telephone lines can be used, eliminating the need to install new lines.

In the configuration of the communication network interconnection system according to the present invention, when a connection request is made from a large user,
In practice, although the exchanges are in the same area, a normal intra-office exchange connection is not performed, so that the exchange cannot receive some services that can be originally provided. In addition, there is a restriction that a connection cannot be made from a terminal located outside the area. However, the purpose of communication targeted by the present invention, such as a provider or a telephone center, is to simply connect a call (information) line, and in most cases, other additional communication services are required. And not. Also, there is not much problem even if the connectable range is limited to a certain specific area. Therefore, the above constraint does not substantially hinder.

According to the above-described first and second communication network interconnection systems according to the present invention, when a certain terminal makes a connection to a large user, the connection between the telecommunication network and the large user is established. Does not use a regular subscriber line. According to the third communication network interconnection method, when a connection is made from a certain terminal to a large user, a normal subscriber line is used for the connection between the telecommunication network and the large user. Although it is used, it is possible to virtually bundle connections with a number of terminals much larger than the number of lines and transmit them.

[0025] Therefore, in the connection charging method using the interconnection method of the communication network, when calculating the call charge imposed on the terminal when the terminal is connected to a large-scale user, the communication charge with the telecommunication network is calculated. A fee can be calculated based on a fee for a connection between the terminal and the exchange without substantially imposing a fee for a connection with a large user. Here, the meaning of "substantially no charge for the connection between the telecommunications network and the large-scale user" means, for example, a part of the case where a communication line as hardware is borrowed. Can be charged, but a charge that is incurred when using a normal subscriber line, specifically, a fixed charge is added for each unit time of connection, and a metered charge according to the connection time This means that there will be no charge to collect the sum of. According to such a communication fee charging method, the communication cost when connecting from a terminal to a large-scale user can be significantly reduced as compared with the conventional method, which also promotes a use opportunity.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail below with reference to some examples.

[First Embodiment] FIG. 1 is an overall configuration diagram showing a first embodiment of an interconnection system for a communication network according to the present invention. The same or corresponding portions as those in FIG. 6 described above are denoted by the same reference numerals, and description thereof will be omitted. One of the features of this method is that the dial-up router 43 conventionally installed in the provider 4 belongs to a part of the telecommunications network 1 (or can be regarded as substantially belonging to a part). The interface device (first signal conversion means) 8 is provided between the dial-up router (second signal conversion means) 43 and the local exchange 10 in the service 1a. Therefore, the housing service 1a and the provider 4 are connected by the TCP / IP protocol using the private line 44 instead of the general line.

FIG. 2 is a detailed diagram showing a connection relationship between the local exchange 10 and the interface device 8. Central office exchange 1
Numeral 0 designates a telephone line interface (IF) 102, an ISDN line interface (IF) 103, a trunk line interface (IF) 10
4. A service processing unit 105 is provided, and the operation of each of these units is totally controlled by a control unit 106. In addition, a common line interface (IF) 107 is provided for transmitting and receiving various control signals required for communication connection and the like between stations.

The subscriber telephone line interface 102 performs an interface for communication with the terminal 21 connected to the analog subscriber line. The ISDN line interface 103 interfaces with the terminal 22 connected to the ISDN line via the DSU 23. The trunk line interface 104 communicates with terminals other than the terminal connected to the exchange 10
The interface between exchanges. The service processing unit 105 provides various services other than a normal call, for example, performs connection processing for a special number (for example, 1xx).

This inter-station signaling system is based on CCITT (International Telegraph and Telephone Consultative Committee) No. 7 is a common signal line system, and the transmission line extracted from the trunk line interface 104 is only a communication line having no signal function, and the signal functions of a plurality of communication lines are concentrated on a common line. . In the first embodiment, a trunk line is extracted from the trunk line interface 104, and a common line is extracted from the common line interface 107 and connected to the interface device 8. Here, the trunk line is T
This is a signal line called TC2M, and 6
30 voice channels having an information amount of 4 kbps are multiplexed, and the transmission speed is 2.048 Mbps. On the other hand, the common line called 7CS is 4.8 kbps
Alternatively, the transmission speed is 48 kbps.

The interface device 8 has four TTC systems.
After receiving 2M and 1 system of 7CS, this was 1.5Mbp
s is a device for converting to a primary rate interface or vice versa. FIG. 3 is a schematic diagram showing a conversion operation principle in the interface device 8. On the exchange side, four TTC2Ms are provided with time slots for communication signals of 120 channels. On the other hand, a 1.5 Mbps primary rate interface (ISDN 1500)
Slots for 24 channels are prepared in one transmission path, and all 24 are used as B channels (communication signals), or 23 B channels and one D channel (control signal). The D channel includes information required for connection such as a telephone number. Therefore, five I
Although SDN 1500 has slots for 120 channels, at least one of them must be used as a D channel. That is, it is used as 119 B channels + 1 D channels or 115 B channels + 5 D channels. For this reason, the TTC2M has a maximum of 120 communication signal time slots, but only 119 channels can actually be used (that is, not busy).

As described above, the interface device 8 rearranges the time slots of the speech signal between the two, and associates the common channel signal with the D channel. This rearrangement may be performed according to a predetermined algorithm. Control signals required for call connection, such as the telephone number of the calling side, are distributed and transmitted to a maximum of five D channels.

In the conventional configuration shown in FIG. 6, the line 5 connecting the telecommunications network 1 and the provider 4 is a general subscriber line, so that all services available on the subscriber line are guaranteed. . Instead, a fee is charged for the connection via this line. That is, for example, when a telecommunications company other than NTT makes a connection between the terminal 2 and the provider 4 using such a subscriber line at the end of NTT, the connection between the telecommunications network 1 and the terminal 2 is established. Since the telephone line passes through two subscriber lines, that is, between the telecommunication network 1 and the provider 4, it is necessary to pay a line usage fee corresponding to the two lines to the NTT companies. Specifically, for example, the conventional method requires payment of 10 yen at least every 3 minutes.

On the other hand, in the configuration of the first embodiment shown in FIG. 1, when a connection is made from the terminal 2 to the provider 4, the subscriber line 3 between the telecommunication network 1 and the terminal 2 is not used. However, since the dedicated line 44 connecting the housing service 1a and the provider 4 is not a normal subscriber line, N
There is no connection fee charged by the TT companies. For example, when a subscriber line connecting an intra-office exchange and each terminal is used, a fixed charge (for example, 1 yen per connection) charged per connection, and a fixed charge (for example, connection 0.025 yen per second). For example, if a connection is made for 3 minutes, 1
Yen + 0.025 x 180 seconds = 5.5 yen (hereafter, 0.025 x 180 seconds = 4.5 yen every 3 minutes), and short meter for remote meter reading, monitoring and control of home appliances, etc. In the case of time communication, a fee of about 1 yen is charged for each communication. In the conventional method, payment of at least about twice as much as 10 yen is required every three minutes, and even for short-time communication of several seconds, payment of 10 yen is required per communication. On the other hand, in the method of the first embodiment, it is tentatively rented a line of the NTT company as the dedicated line 44, and a part of the rent is paid to the user, or a part of the other equipment charge is borne. Even so, the cost of the interconnection scheme is greatly reduced. Therefore, a significant reduction in communication cost can be achieved.

[Second Embodiment] FIG. 4 is an overall configuration diagram showing a second embodiment of a communication network interconnection system according to the present invention. The second embodiment has a configuration similar to that of the first embodiment, except that the interface device 8 is incorporated not in the housing service but in the facility of the telecommunications carrier and is defined as a part of the telecommunications network 1. Is done. As described above, the signal converted to ISDN 1500 by the interface device 8 is taken out through the DSU 47 and
Is connected to the provider 4 via. The provider 4 sends and receives signals via the DSU 41 as in the conventional configuration.

In this configuration, when adding a line, it is necessary to lay an optical fiber cable or the like for connecting the telecommunication network 1 and the provider 4. However, it is only necessary to install a much cheaper interface device 8 in the telecommunications network 1 without adding a switch which has been conventionally required. Therefore, the equipment burden on the NTT companies that own the telecommunications network 1 is reduced.

Third Embodiment FIG. 5 is an overall configuration diagram showing a third embodiment of a communication network interconnection system according to the present invention. The third embodiment is different from the above two examples in that a large user uses a large number of telephones such as a call center 9. The housing service 1a and the call center 9 are connected by a dedicated line 93 by the primary rate interface, and the call center 9 connects this to each terminal 92 via a private branch exchange (PBX) 91. Here, the line between the housing service 1a and the call center 9 can use an NTT dedicated line of an optical fiber cable.

[Fourth Embodiment] FIG. 6 is an overall configuration diagram showing a fourth embodiment of a communication network interconnection system according to the present invention. The interconnection system of the fourth embodiment is similar to the interconnection system of the second embodiment, and the TT
C2M and 7CS are converted and inversely converted to ISDN 1500. ISDN 1500 is not sent to the provider 4 via an optical fiber or the like as it is, but is modulated into a format that can be transmitted through the existing subscriber line 3p. It is sent to the provider 4 side. The subscriber line 3p here is a metal wire (twisted pair copper wire) which is a general analog telephone line, and is a technique for superimposing a high-speed data signal on an analog voice signal transmitted and received via this wire. For example, a technology called xDSL (Digital Subscriber Line) is used. Well-known xDSL technologies include HDSL (High Speed Digital Subscriber Line), SDSL (Symmetric Digital Subscriber Line), ADSL
(Asymmetric Digital Subscriber Line), VDSL (Ultra High Speed Digital Subscriber Line) and the like. Here, the case where the most general ADSL is applied will be described. However, it is easily conceivable that the same applies to other methods.

In this interconnection system, since the line connecting the provider 4 and the exchange is an ordinary subscriber telephone line, for example, if a line previously drawn for office use or the like at the office of the provider 4 is used. Good. The subscriber line 3p connected to the telephone terminal 401 owned by the provider 4 is usually connected to the intra-office exchange 10 via the main distribution board (MDF) 11 in the exchange. Then, as shown in FIG. 6, an ADSL splitter 12 is inserted between the main wiring board 11 and the local exchange 10. The ADSL splitter 12 has a function of separating a normal analog voice call signal from a wideband signal for data (normally 4 kHz or more) and a function of mixing the same in reverse. On the other hand, the data signal is connected to the interface device 8 via the ADSL modem 13 having a modulation / demodulation function. On the provider 4 side, an ADSL splitter 402 having almost the same function as the ADSL splitter 12 is inserted in front of the telephone terminal 401, and a wideband data signal extracted from the ADSL splitter 402 is sent to the router 45 via the ADSL modem 403. Connecting.

As described above, the interface device 8 sets T
It has a function of mutually converting between TC2M and 7CS and a primary rate interface signal of 1.5 Mbps. Therefore, the opposite side of the interface device 8 from the exchange is a digital signal having a transmission rate of 1.5 Mbps. ADS
The transmission rate of L depends on the modulation method used (DMT = Discrete
Multitone or CAP = Carrierless Amplitude / Phase
modulation) and transmission distance, but up to 1 in the down direction from the station to the user (here, the provider).
Transmission of about 2 Mbps, or up to about 2 Mbps in the uplink from the user to the station is possible. In urban areas, exchanges are generally located at a very high density, and the provider to which they connect and the exchange are often in close proximity (in other words, the provider and exchange are relatively close together). What is necessary is to guarantee the connection under such connection conditions). Therefore, a decrease in the transmission speed due to the transmission distance can be almost ignored, and the performance of the ADSL can be almost fully exhibited. That is, the ISDN 1500 converted by the interface device 8 can be directly modulated by the ADSL modem 13 and sent to the provider 4 via the ADSL splitter 12 and one subscriber line 3p.

In the case of a provider of a certain size, the number of subscriber lines provided between the provider and the exchange is not limited to one, but is provided in large numbers. Therefore, two lines may be paired, one of which may be up, the other may be down, and the up and down may be separated for transmission and reception. However, since the ISDN 1500 is a time-division multiplexed bidirectional transmission signal, the time-division multiplexed signal is separated into an upstream signal and a downstream signal to be separated into two signals.
It is necessary to add a function of distributing to a subscriber line.

The interconnection system of the fourth embodiment has been regarded as one of the technologies for improving the transmission speed between the individual terminal 2 of each customer and the telecommunication network 1 so far.
L is intended to be used for a technique for securing the number of transmission paths by bundling communications requested by many customers.
Of course, in this case, the xDS between the terminal 2 and the telecommunications network 1
When performing high-speed data transmission using L or the like, the number of communications that can be passed through a pair of lines is small, so the effectiveness is low. However, many customers connect by dial-up at a maximum communication speed of 56 kbps. Therefore, a considerable amount of communication can be carried on a pair of lines.

According to this configuration, without newly laying an optical fiber or the like, it is possible to provide a customer with a business service to be provided to a customer by using an existing metal telephone line which has been conventionally used simply as a general telephone of a provider. It can be used as an internet connection line. In this configuration, when a connection is made from the terminal 2 to the provider 4, the subscriber line 3 between the telecommunications network 1 and the terminal 2 is used individually, but the line connecting the housing service 1 a and the provider 4. Is a form in which a normal subscriber line is shared by a plurality of persons. In addition, since it does not pass through the intra-office switchboard, even if the subscriber charges for the subscriber line 3p are divided and paid for by the user, or a part of other equipment charges are paid, the fee for the interconnection method is greatly increased. Alleviated. Therefore, as in the first to third embodiments, a great reduction in communication cost can be achieved by this configuration.

In any of the above embodiments, as described above, the signal lines on the station side are not limited to TTC2M, but various signal lines used for inter-station connection can be used. Specifically, instead of four TTC2Ms, D
The same is true even if one TTC8M of 60 toll switches is used. In addition, TTC5 such as D70 city exchange
Time slots may be allocated between one 2M slot and 30 ISDN 1500 slots. Of course, the signal form and number of interconnections in the interface device 8 are not limited to this.

The above embodiments are merely examples, and can be changed or modified within the spirit of the present invention.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a communication network interconnection system according to a first embodiment of the present invention.

FIG. 2 is a detailed diagram showing a connection relationship between an intra-office exchange and an interface device in the interconnection system of the first embodiment.

FIG. 3 is a schematic diagram showing a conversion operation principle in the interface device in the interconnection method according to the first embodiment.

FIG. 4 is a schematic configuration diagram of a communication network interconnection system according to a second embodiment of the present invention.

FIG. 5 is a schematic configuration diagram of a communication network interconnection system according to a third embodiment of the present invention.

FIG. 6 is a schematic configuration diagram of a communication network interconnection system according to a fourth embodiment of the present invention.

FIG. 7 is a schematic configuration diagram of a conventional communication network interconnection scheme.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Telecommunication network 1a ... Housing service 10 ... Local exchange 101 ... Exchange part 102 ... Subscription telephone line interface 103 ... ISDN line interface 104 ... Trunk line interface 105 ... Service processing part 106 ... Control part 107 ... Common line interface 11 ... Main Distribution frame 12, 402 ADSL splitter 13, 403 ADSL modem 2 Terminal 3 Subscriber line 4 Provider 41, 47 DSU 42 Signal line 43 Dial-up router 44 Signal line 45 Router 46 Dedicated line 6 IP network 7 Communication line 8 Interface device 9 Call center

Claims (5)

[Claims] A telecommunications network, a plurality of terminals connected to the telecommunications network, and a large user also connected to the telecommunications network, wherein the plurality of terminals and the large users are interconnected. A) an exchange belonging to said telecommunications network and connected to said plurality of terminals; and b) a multiplexed speech path signal and a common line taken out of said exchange. Signals and ISDN 1500 signals conforming to the primary rate interface are mutually converted, and the time slots are rearranged mutually by associating the communication path signals with the communication channels of the ISDN 1500 signals, The common line signal to the ISDN 15
First signal format conversion means for distributing to the control channel of the 00 signal or conversely, and c) a signal conforming to said primary rate interface;
A second signal format converter for mutually converting a signal conforming to the TCP / IP protocol, wherein the first and second signal format converters are arranged close to the exchange, and the TCP / IP protocol A telecommunications network interconnection system, wherein a telecommunications network and a large-scale user are mutually connected via a transmission line conforming to the standard. 2. A communication system comprising: a telecommunications network; a plurality of terminals connected to the telecommunications network; and a large user also connected to the telecommunications network. A) an exchange belonging to said telecommunications network and connected to said plurality of terminals; and b) a multiplexed speech path signal and a common line taken out of said exchange. Signals and ISDN 1500 signals conforming to the primary rate interface are mutually converted, and the time slots are rearranged mutually by associating the communication path signals with the communication channels of the ISDN 1500 signals, The common line signal to the ISDN 15
A first signal format conversion means for distributing to the control channel of the 00 signal or vice versa, wherein the first signal format conversion means is disposed in close proximity to the exchange, and is connected via the transmission line of the ISDN 1500. An interconnection method for a communication network, wherein a telecommunications network and a large-scale user are mutually connected. 3. A communication system comprising: a telecommunications network; a plurality of terminals connected to the telecommunications network; and a large-scale user also connected to the telecommunications network. A) an exchange belonging to said telecommunications network and connected to said plurality of terminals; and b) a multiplexed speech path signal and a common line taken out of said exchange. And an ISDN 1500 signal conforming to the primary rate interface or a signal equivalent thereto, wherein the communication path signal and the IS signal are converted.
The time slots are rearranged mutually by associating the DN 1500 signal or the equivalent signal with the communication channel, and distributing the common line signal to the control channel of the ISDN 1500 signal or the equivalent signal or vice versa. C) modulating the ISDN 1500 signal or a signal equivalent thereto into a digital subscriber line transmission wideband signal that can be superimposed on an analog subscriber line voice call signal;
Superimposing the modulated signal on an analog subscriber line connecting a telecommunications network and a large user, and conversely separating and demodulating a similar wideband signal received through the analog subscriber line to the first signal format And a broadband signal superimposing / separating means for passing to the conversion means, wherein the telecommunications network and the large-scale user are interconnected via the analog subscriber line. 4. The interconnection system according to claim 3, wherein the digital subscriber line transmission wideband signal is xDSL.
An interconnection method for a communication network, which is a signal. 5. A method of charging a communication fee using the interconnection system of a communication network according to claim 1, wherein said terminal is connected to a large-scale user when said terminal is connected to said terminal. When calculating the charge to be imposed, instead of a fixed fee system in which the maximum talkable time is determined for each predetermined amount in the connection between the terminals, a charge according to the talk time for the connection between the terminal and the exchange is set. A billing method characterized by calculating a call charge based on the basis.