JPH06268651A - Communications system - Google Patents

Abstract

PURPOSE:To simply provide a communications system which can set and change the form of connection between communications terminals flexibly for each user concerning the mutual communication between the communications terminals owned by various offices, groups or individuals. CONSTITUTION:Concerning the communications system for connecting a station house 25 provided with a LAN backbone 10 and a network system access system 19 to which plural communications terminals 15 are connected, inside the access system 19, a station side subscriber's line terminating device 23 is provided for terminating and multiplexing or demultiplexing signals from the plural communications terminals 15. Inside this station house 25, over one first converters 12 are provided to replace a signal from the station side subscriber's line terminating device 23 with a signal on the LAN backbone 10 and to replace the signal on the LAN backbone 10 with a signal on the access system 19, and an inter-device interface 21 is provided to connect the station side subscriber's line terminating device 23 and the first converters 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system in which each user can flexibly set and change the connection form between communication terminals connected to the system.

[0002]

2. Description of the Related Art Conventionally, as a communication system in which each user can flexibly set and change the connection form between communication terminals connected to a system, a LAN (local area network) or a plurality of LANs are connected to each other through a private line or a public line. Wide area LAN (WAN) connected by is widely used.

FIG. 4 shows such a conventional example. 10 is L
An AN backbone, 11 is a LAN server, 15 is a communication terminal, 18 is a LAN terminal, 26 is a router, and 29 is a LAN board.

[0004]

However, a LAN or WAN is a continuous or multiple site (or building).
It is a self-employed communication system intended for communication between communication terminals owned by the same business office or group within the company, and for communication between communication terminals owned by different business offices, groups, or individuals outside the site. Has the disadvantage that it cannot be used. Also,
It is possible to connect a plurality of LANs through a router, but since each LAN is individually managed, there is a limitation in using each other's terminals as LAN terminals of the other party.

[0005]

SUMMARY OF THE INVENTION The present invention takes the above problems into consideration,
An object of the present invention is to provide a communication system having a simple configuration in which each user can flexibly set and change the connection form between communication terminals in communication between communication terminals owned by different business establishments, organizations, and individuals.

[0006]

To achieve the above object, the present invention provides a communication system for connecting a LAN and a network having a plurality of communication terminals, wherein signals from the plurality of communication terminals are provided in the network. A subscriber line terminating device for terminating and multiplexing or separating,
In the AN, there is provided at least one first conversion device that replaces a signal from the station side subscriber line terminating device with a signal on the LAN and replaces a signal on the LAN with a signal on the network. And an inter-device interface for connecting the station side subscriber line terminating device and the first conversion device.

[0007]

According to the present invention, each communication terminal commonly uses a LAN through a network having a plurality of communication terminals. Therefore, communication terminals owned by different business establishments, groups, and individuals are mutually connected. In this communication, a communication system in which each user can flexibly set and change the connection form between communication terminals can be realized with a simple configuration.

[0008]

Embodiments of the present invention will now be described in detail with reference to the drawings.

According to the present invention, a network of a telecommunications carrier is interposed between a LAN terminal and a LAN backbone, and the network of the telecommunications carrier and the LAN backbone are connected by an inter-device interface in the network of the telecommunications carrier. LAN technology is different. As shown in FIG. 1, according to the present invention, a communication terminal 15, a communication terminal 16 and a LAN terminal 18 owned by a large number of users are indirectly controlled by a communication carrier via a network system / access system 19 of the communication carrier. It is configured to access the LAN backbone 10 to be managed. Communication terminal 1 owned by unspecified number of users
5, the communication terminal 16, the LAN terminal 18 is a network system on the LAN backbone 10 managed by the communication carrier.
In addition to the conventional LAN configuration, a first conversion circuit for the communication interface of the network service and the LAN interface is provided on the station side / communication terminal side of the network system access system 19 in order to have a configuration for accessing via the access system 19. 12, a second conversion circuit 14 between the communication interface of the communication terminal and the communication interface of the network service, and a third conversion circuit 17 between the LAN interface of the LAN terminal and the communication interface of the network service are added. 11 is a LAN server, 13 is each L
A fourth conversion circuit for performing mutual conversion between a communication interface (multiplex transmission path between stations) and a LAN interface in the AN backbone 10, 20 is a user / network interface of a network service (dedicated line service),
Reference numeral 21 denotes an inter-device interface of network service (dedicated line service).

FIG. 2 shows another embodiment of the present invention. This is a subscriber communication in which a public / private service is multiplexed and provided on one subscriber line as a network system access system 19 for the communication terminal 15 of the unspecified majority user to indirectly access the LAN backbone 10. The case where the system is used is shown. This subscriber communication system has a subscriber side line terminating device 23 on the office side, a subscriber line terminating device 24 on the user side, and a transmission medium therebetween. Reference numeral 25 denotes a telecommunications carrier's station building.

The information from each communication terminal 15 is converted by the second conversion circuit 14 from the communication interface of the communication terminal 15 to the user / network interface 20 of the network service (dedicated line service) and the user side of the subscriber communication system. The leased line service port of the subscriber line terminating device 24 accommodates the network (subscriber communication system) and transmits it to the subscriber side line terminating device 23 of the telecommunications carrier. Then, the station side subscriber line terminating device 23 distributes the leased line service to the inter-device interface 21 of the network service (dedicated line service) by being multiplexed with the information from other terminals, and then to the first conversion circuit 12. To transmit. The second conversion circuit 14 on each communication terminal side and the first conversion circuit 1 directly attached to the LAN backbone 10 in the station building 25
Between the two, the information is transmitted from the communication terminal 15 including the communication protocol of the communication terminal 15 as it is by connecting through the subscriber communication system through a fixed path. The first conversion circuit 12 is different from the communication terminal 15 in the communication terminal 15
As a virtual communication terminal that communicates using the communication protocol 1
The pair has a bidirectional function, and LA on the LAN backbone 10 is a virtual LAN terminal for other devices / terminals 11 and 12 on the LAN backbone 10 in the station.
It has a function of communicating in various communication modes by N access protocol and NOS (network operating system). In addition, the first conversion circuit 12 bidirectionally transships the user information of the communication terminal 15 and the user information of the virtual LAN terminal, thereby the communication terminal 15
The information from the virtual LAN terminal is replaced with the information from the virtual LAN terminal, and other devices / terminals 11 are used in various communication modes by the LAN access protocol and NOS on the LAN backbone 10.
And 12 can be communicated with. Also, the exchange 22 can be connected to the public network through the interface 28.
27 is a user / network interface of a network service (exchange service).

Communication between the communication terminal 15 and the communication terminal 15 is
Between the communication terminal 15 and the virtual LAN terminal, a virtual LAN
Communication between the terminal and the virtual LAN terminal and between the virtual LAN terminal and the communication terminal 15 is performed in a serially connected form. Since communication between virtual LAN terminals and virtual LAN terminals can be performed in various communication modes on the LAN backbone 10 by NOS, each communication terminal 15 using this system is a LAN owned and managed by a communication carrier or the like. It is possible to remotely receive various communication services that the virtual LAN terminal on the backbone 10 can receive. LAN server 1
1 manages registration / removal of a virtual LAN terminal in the first conversion circuit 12.

According to the configuration of the embodiment of the present invention described above, in communication between communication terminals owned by different business establishments, groups, and individuals, each user can flexibly set the connection form between communication terminals. Also, a communication system that can be changed can be realized with a simple configuration.

FIG. 3 shows still another embodiment of the present invention. This is a plurality of stations 2 owned and managed by telecommunications carriers, etc.
5, LAN backbones 10 are distributed and arranged, and each LAN backbone 10 is provided with a fourth conversion circuit 13 for performing mutual conversion between a communication interface (multiplex transmission path between stations) and a LAN interface. The conversion circuits 13 of No. 4 are connected to each other by a multiplexing transmission path between stations. The fourth conversion circuit 13 has a function of bidirectionally transmitting burst data on the LAN backbone 10 to the opposing fourth conversion circuit 13 with a small delay time, and the LAN backbone within the station. The other devices / terminals 11 and 12 above have a function as a virtual LAN terminal that communicates in various communication modes by the LAN access protocol and NOS on the LAN backbone 10. By connecting the LAN backbones 10 dispersedly arranged in a plurality of stations 25 through the multiplex transmission path between the fourth conversion circuit 13 and the stations, mutual LAN terminals are connected to each other.
Since it can be handled as an AN terminal, it is possible to configure one huge LAN backbone that spans between office buildings. That is, it is possible to realize a communication system in which a large number of unspecified users can flexibly select and set various connection modes in a wider range as in the embodiment of FIG.

[0015]

As described above, according to the present invention,
In communication between communication terminals owned by different business establishments, organizations, and individuals, there is an advantage that a communication system in which each user can flexibly set and change the connection form between communication terminals with a simple configuration.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention.

FIG. 2 is a block diagram showing another embodiment of the present invention.

FIG. 3 is a block diagram showing still another embodiment of the present invention.

FIG. 4 is a diagram showing a configuration example according to a conventional technique.

[Explanation of symbols]

10 LAN Backbone 11 LAN Server 12 First Conversion Circuit 13 Fourth Conversion Circuit 14 Second Conversion Circuit 15 Communication Terminal (Communication Interface Between Terminals) 16 Communication Terminal (User / Network Interface of Network Service) 17 Third Conversion circuit 18 Communication terminal (LAN interface) 19 Network system access system 20 Network service (dedicated line service) user / network interface 21 Network service (dedicated line service) inter-device interface 22 Switch 23 Station side subscriber line termination device 24 user side subscriber line terminating device 25 telecommunications carrier station 26 router 27 network service (switching service) user / network interface 28 network service (switching service) device-to-device interface 29 LAN board

Claims (2)

[Claims] 1. A communication system for connecting a LAN and a network having a plurality of communication terminals, wherein a station side subscriber line terminating device for terminating signals from the plurality of communication terminals and multiplexing or demultiplexing the signals from the plurality of communication terminals in the network. In the LAN, at least one first circuit for replacing a signal from the station side subscriber line terminating device with a signal on the LAN and replacing a signal on the LAN with a signal on the network. 1. A communication system comprising: one conversion device; and an inter-device interface for connecting the station side subscriber line terminating device and the first conversion device. 2. The communication system according to claim 1, wherein a plurality of LANs are present, said LANs are connected by a multiplexed transmission path, and each of said plurality of LANs has a second multiplexed transmission path. A communication system characterized by terminating at the conversion device.