JPH09224024A - Atm exchange - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively utilize a CLAD by performing voice exchange processing through a PBX module in the case of that processing and making access to an ATM network into cell by providing one CLAD in a system. SOLUTION: When an extension telephone set 37 hooks off and a dial signal is sent out, an ATM exchange 21 analyzes the dial contents and decides an azimuth. In the case of communication with an ATM terminal, a central control part 27 at a main controller part 26 translates a dial number to an ATM address and sends call setting information through an ATM subscriber circuit part 25 to an ATM terminal 35. Voice data are analog voice data between the extension telephone set 37 and the ATM exchange 21, made into ATM through a CLAD 28 and communicated as the ATM cell. Thus, in the case of voice exchange processing only, that processing is performed by the PBX module and the access to the ATM network is made into cell by providing one CLAD in the system so that the CLAD can be effectively utilized.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mode in which users send fixed length packets called cells asynchronously with each other (Asynchronous Transfer Mower).
de) relates to an ATM exchange which performs exchange processing.

[0002]

2. Description of the Related Art Conventionally, when accommodating voice data in this type of ATM switch, CLAD (Cell Assembly) is used.
A device for assembling and disassembling voice, called "le and Desemble", into an ATM cell is installed on the terminal side,
It was connected to the exchange through the ATM interface.

FIG. 4 is a functional block diagram of a conventional ATM exchange. In FIG. 4, reference numeral 2 is an ATM relay circuit unit that is connected to the ATM relay lines 8 and 9 and controls the interface with the ATM network, 11 is an extension telephone 10 and CLAD that disassembles and assembles voice data into ATM cells, and 3 is an ATM cell. It is an ATM switch unit for controlling communication between an ATM terminal, an extension telephone, and an ATM relay line, a communication between the ATM terminal and the ATM relay line, and a communication path between the ATM terminals. The main control unit 5 is used for communication between the extension telephone and the ATM trunk line and AT.
It is composed of a central control unit 6 that manages various exchange processes such as communication between M terminals and ATM trunk lines and connection between ATM terminals, and management data of extension lines and trunk lines that differ for each installed station, and system management data. It is composed of the memory unit 7.

The operation of a telephone call between extension telephones of the conventional ATM exchange 1 having the above-mentioned configuration will be described below.

FIG. 5 shows a flow of processing relating to an extension call. First, when the extension telephone 10 goes off-hook and dials (S101), the other party's telephone number is converted in the CLAD 11 to an ATM address (S102), and the call setting information (SETUP) is sent to the ATM subscriber circuit unit 4 (S).
103).

The ATM subscriber circuit section 4 sends the received call setting information to the main controller section 5. The central control unit 6 of the main control control unit 5 secures the resources for ATM communication, determines the destination from the ATM address, and if the communication is within the local station (S104), it passes through the ATM subscriber circuit unit 4. The call setting information is sent to the CLAD 12 (S106), and the call setting acceptance information (CALLPRO) is sent to the calling CLAD 11.
C) is transmitted (S105).

The CLAD 12 sends a ringer sound to the extension telephone 13 (S107) to ring the bell. Next, when the incoming extension telephone 13 goes off-hook (S10)
8) CLAD 11 detects this and sends connection information (CONNECT) to main controller unit 5 (S10).
9).

In the main control control unit which has received the connection information,
The connection information is sent to the calling side CLAD 11 (S110), and the connection confirmation information (C is sent to the receiving side CLAD 12).
ONN ACK) is transmitted (S111), and a call state is set (S112). At this time, the voice data is the extension telephone 1
Between 0 and 13 and CLAD 11 and 12 is analog audio data (S113 and S116), CLAD1
The ATM cells 1 and 12 are communicated with the ATM switch 1 by ATM cells (S114, S115).

To end the call, the CLAD 11 detects the on-hook of the extension telephone 10 (S117) and sends a disconnection request (REL) to the ATM subscriber circuit section 4 (S11).
8). The ATM subscriber circuit unit 4 sends the received disconnection request to the main control unit unit 5 and the central control unit 6 of the main control control unit 5.
Then, the ATM resource is released (S119) and a disconnection request is sent to the CLAD 12 of the call partner (S120).

In CLAD 12, the disconnection completion notification (REL
COM) to the ATM subscriber circuit unit 4 (S12)
1). The ATM subscriber circuit unit 4 sends the received disconnection completion notification to the main controller unit 5, and the central control unit 6 of the main control controller 5 sends the disconnection completion notification to the CLAD 11 (S).
122). The extension telephone set 13 is on-hook (S123) and the call ends.

[0011]

However, the conventional ATM switch has a drawback that the cost is high because CLAD is required for each extension telephone.

Therefore, an object of the present invention is to provide an ATM switch which can be constructed at a low cost with a small CLAD.

[0013]

According to the present invention, an ATM exchange circuit unit, an ATM switch unit, an ATM subscriber circuit unit, a main controller unit, a PBX relay circuit unit, a PBX switch unit, and a PBX subscriber circuit unit are provided in an ATM switch. And a CLAD unit for converting PBX data and ATM data is provided in the main controller unit.

[0014]

According to the first aspect of the present invention, the PBX module is used only for voice exchange processing, and the access to the ATM network is made into cells by one CLAD in the system, so that unnecessary conversion is eliminated and CLAD is performed. Can be effectively used.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an ATM exchange according to an embodiment of the present invention.

As shown in FIG. 1, the ATM module 22
Is connected to the ATM relay line 34 and controls the ATM relay circuit 23 and the ATM terminal 35.
A which accommodates the ATM and controls the interface with the ATM terminal 35.
It is composed of the TM subscriber circuit unit 25, the communication with the ATM relay line 34, the communication between the ATM terminal 35 and the PBX extension telephone, and the ATM switch unit 24 for controlling the communication path between the ATM terminals 35.

The main control unit 26 includes an ATM terminal 35 and an A
A central control unit 27 that manages various exchange processes such as communication with the TM relay line 34, communication between the ATM terminal 35 and a PBX extension telephone, connection between the ATM terminals 35, and management of extension lines and relay lines different for each installed station. The memory 29 is composed of data and system management data, and the CLAD 28 for assembling and disassembling voice data from the PBX into ATM cells.

The PBX module includes a PBX relay line 36,
PB that is connected to the network 38 and controls the interface with the PBX network
A PB that accommodates the X relay circuit unit 31 and the PBX extension telephones 37 and 39 and controls the interface with the PBX extension telephones.
Communication between the X subscriber circuit unit 33 and the ATM trunk line, or PBX
It is composed of communication between the extension telephones and the PBX extension telephones, and an X switch section 32 for controlling a communication path between the extension telephones.

The ATM switch 21 configured as described above
A call operation between PBX extension telephones according to the above will be described with reference to FIG.

When the extension telephone 37 goes off hook and sends a dial signal (S201), the ATM exchange 21
The contents of the dial are analyzed and the route is determined (S20).
2). In this embodiment, it is assumed that the extension telephone 39 is selected. A ringer sound is sent to the extension telephone 39 via the PBX subscriber circuit unit 33 (S203) to ring the bell. Next, when the incoming extension telephone set 39 goes off-hook (S204), it is detected by the PBX subscriber circuit unit 33 and sent to the central control unit 27 of the main control unit unit 26, and the call path switch 32 is set to establish a call state. (S20
5).

When the call is terminated, the PBX subscriber circuit unit 33 detects the on-hook of the extension telephone 37 (S20).
8), the on-hook information is sent to the main controller 26, and the central controller 27 of the main controller 26 releases the call path. The extension telephone 39 goes on-hook (S209) and the call ends.

Next, the flow of processing relating to a call between the PBX extension telephone and the ATM terminal will be described.

As shown in FIG. 3, first, the extension telephone 37
Off-hook and dial (S301), PBX
The subscriber circuit unit 33 detects this and sends the dial information to the main control unit unit 26 (S302).

In the central control unit 27 of the main control control unit 26,
The received dial is analyzed, and if it is communication with an ATM terminal, the dial number is converted into an ATM address (S30
3), secure resources for ATM communication (S304),
The call setting information (SETUP) is sent to the ATM terminal 35 via the ATM subscriber circuit unit 25 (S305) (S306).

A connection request (CONNECT) is issued from the ATM terminal 35.
CT) via the ATM subscriber circuit unit 25 (S30
7, S308), and sends it to the central control unit 27 of the main control unit 26, and in response thereto, the main control unit 26 sends an ATM.
By transmitting an ATM terminal 35 (CON ACK) signal via the subscriber circuit unit 25 (S309), the extension telephone 37 and the ATM terminal 35 are brought into a call state (S31).
2). At this time, the voice data is analog voice data between the extension telephone 37 and the ATM exchange 1 (S3
13, S314), and ATM cells are formed through the CLAD 28, and the ATM exchange 1 and the ATM terminal 35 are communicated by ATM cells (S315, S316).

To terminate the call, the PBX subscriber circuit unit 33 detects the on-hook of the extension telephone 37 (S31).
7), send as a disconnection to the main control unit 26 (S31
8) In the central control unit 27 of the main control control unit 26, the ATM
The resource is released (S319), the disconnection request (REL) is sent through the ATM subscriber circuit unit 25 (S320), and the AT
It is sent to the M terminal 35 (S321). A disconnection completion notice (RELCOM) is sent from the ATM terminal 35 to the central control unit 27 of the main control unit 26 via the ATM subscriber circuit unit 25 (S322) (S323), and the call ends.

[0027]

According to the present invention, if only voice exchange processing is performed, the PB is used.
The X module is used to access the ATM network, and cells are converted into cells with one CLAD in the system, eliminating unnecessary conversion, enabling effective use of CLAD, and realizing a low-priced ATM switch capable of accommodating existing extension telephones. it can.

[Brief description of drawings]

FIG. 1 is a block diagram of an ATM exchange according to an embodiment of the present invention.

FIG. 2 is a sequence chart of the ATM exchange according to the embodiment of the present invention.

FIG. 3 is a sequence chart of the ATM exchange according to the embodiment of the present invention.

FIG. 4 is a functional block diagram of a conventional ATM exchange.

FIG. 5 is a sequence chart of a conventional ATM exchange.

[Explanation of symbols]

 21 ATM Switch 22 ATM Module 23 ATM Relay Circuit Unit 24 ATM Switch Unit 25 ATM Subscriber Circuit Unit 26 Main Controller Unit 27 Central Control Unit 28 CLAD 29 Memory Unit 30 PBX Module 31 PBX Relay Circuit Unit 32 PBX Switch Unit 33 PBX Subscriber Operator's circuit 34 ATM trunk line 35 ATM terminal 36,38 PBX trunk line 37,39 Extension telephone

Claims (1)

[Claims] 1. A connection between an ATM terminal and an ATM network, and an ATM.
A main control unit that handles various exchange processes such as connection between terminals, connection between extension telephone and office line, connection between extension telephone, connection of voice data and ATM, and AT of voice data
Central control module composed of CLAD unit for disassembling / assembling M cells, ATM network interface unit for controlling exchange of ATM network signals and communication channel, ATM
AT for controlling signals exchange with terminals and communication channels
M Subscriber interface unit and A for exchanging ATM cells
ATM module section consisting of TM switch section and PS
A PBX module section including a station line interface section for controlling signals exchange with TN and communication channels, an extension interface section for controlling signals exchange with extension telephones and communication channels, and a time switch section for exchanging voice data. In case of exchanging only voice data, switching is performed only in the PBX module, and in case of exchanging ATM only, switching is performed only in the ATM module. An ATM exchange characterized by being connected via a CLAD that is disassembled and assembled into