JPH11145966A - Atm private branch exchange system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ATM(asynchronous transfer mode)-PBX system for making a TES (voice communication virtual server) able to manage the service state of a TEC (voice communication virtual client) by a management table. SOLUTION: The TES 123 is provided with a TES storage part 124, a TES/ ATM interface part 126, a TES/ATM call control part 125, a TES control part 128 for monitoring and controlling the whole and a TEC service state storage part 127 for holding a service management table. The TECs 145 and 146 are provided with TEC/ATM interface parts 129 and 137, TEC/ATM call control parts 131 and 139, TEC control parts 132 and 140 for monitoring and controlling the whole and service state transmission parts 130 and 138 for transmitting the latest service state to the TES in real time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ATM private branch exchange system (private branch exchange system in an asynchronous transfer mode) which enables real-time two-way voice communication and switching operation on an ATM network.

[0002]

2. Description of the Related Art Conventionally, in an ATM private branch exchange system, a TES (Telephony Emulation Server, voice communication virtual server) responds to a communication request from a TEC (Telephony Emulation Client, voice communication virtual client).
Build G (Emulated Telephony Group, virtual voice communication group). The construction of the ETG means that the TEC sends its TEC identifier and ATM address to the TES,
S means that they are associated with each other and registered in the TES address table. If there are two TECs, both TECs
A method has been adopted in which, when a data channel is set between TECs after participating in an ETG, communication becomes possible. Hereinafter, a conventional ATM private branch exchange system will be described with reference to FIG.

FIG. 4 is a block diagram showing a conventional ATM private branch exchange system. As shown in FIG. 4, on an ATM network 122, a TES 101 for performing call control and a plurality of TECs 120 and 121 for performing voice communication are provided. In FIG. 4, 101 is TES and 102 is TE
A TES storage unit 103 for holding a C table, and a TES storage unit 102 and a TES / ATM interface unit 1 described later
TES / ATM call controller 104, which monitors and controls a TES / ATM call controller 104 to be described later, 104 is a TES / ATM call controller which controls ATM call control, and 105 is a device for exchanging data with the ATM network 122. TES AT
An M interface unit. 106 and 113 are A
TEC / ATM interface units 107 and 114 for controlling data exchange with the TM network 122; TEC / ATM call control units 107 and 114 for controlling ATM call control processing;
8, 115 are TEC / ATM interface units 106,
113, TEC / ATM call control units 107 and 114, voice input units 111 and 118 described later, and voice output unit 11 described below
TEC control units that monitor and control the audio processing units 2 and 119 and audio processing units 110 and 117 described below, 109 and 116 are TEC storage units, and 110 and 117 are audio processing units that manage audio processing.
Reference numerals 11 and 118 denote voice input units for controlling voice input.
119 is an audio output unit for controlling the output of audio, 120 and 121
Is TEC.

The call control operation of the ATM private branch exchange system configured as described above will be described.

[0005] When performing voice communication with another TEC 121, the TEC 120 needs to participate in a virtual voice communication group (ETG) managed by the TES 101 in advance. Generally, the TEC knows the ATM address to the TES, and the TEC 120 uses the point-to-point bidirectional virtual channel connection (hereinafter referred to as "PP bidirectional VCC") to the TES to transmit call control information. Set).

The TES 101 sets a point-to-multipoint with the TEC 120.

[0007] The TEC 120 uses its PP bi-directional VCC to store its TEC identifier and ATM address in the TES 101.
Send to The TES 101 converts the TEC 120 to the TEC
When receiving the identifier and the ATM address, the TES 101 associates the TES 101 with the TES storage unit 102 and manages the identifier and the ATM address.
In the TEC table. The TEC 120 is now T
This means that the user has participated in the ETG managed by the ES 101. Similarly, the TEC 121 also participates in the ETG.

Next, a data channel is set so that the TEC 120 performs voice communication with the TEC 121. TEC1
20 transmits a data channel setting request with the TEC 121 to the TES 101 using the PP bidirectional VCC.
Upon receiving the data channel request, the TES 101
Referring to the table, the ATM address corresponding to the TEC identifier of the TEC 121 is determined, and the ATM address of the TEC 121 is determined using the PP bi-directional VCC.
Send to The TEC 120 sets a data channel with the TEC 121 using the received ATM address, and enters a call start state.

[0009]

However, in the above-described conventional ATM private branch exchange system, the TES 101
Since the service state of the ECs 120 and 121 is not managed, if the partner TEC that performs voice communication with the own TEC has set communication rejection, the ATM request of the partner TEC is obtained from the TES by the TEC communication request, and the partner TEC is acquired. However, since it is determined that communication rejection has been set after a communication request has been issued, there has been a problem that communication inability is not immediately determined. Further, the conventional ATM private branch exchange system has a problem in that a request sound such as a call waiting due to an interrupt from another TEC is generated even during a call that the user does not want to be interrupted.

In this ATM private branch exchange system, TE
By transmitting the service status to the TES in real time, it is required that the TES manage the TEC service status in the management table.

According to the present invention, the TEC is executed in real time by the TES.
It is an object of the present invention to provide an ATM private branch exchange system in which the TES can manage the service state of the TEC in the management table by transmitting the service state to the ATM.

[0012]

In order to solve the above-mentioned problems, an ATM private branch exchange system according to the present invention comprises a plurality of TECs for performing voice communication, a TEC identifier for performing call control, and a TEC identifier.
An ATM in which a TES storing a C identifier in association with a TEC ATM address is arranged on an ATM network.
In the private branch exchange system, the TES includes a TES storage unit that holds a TEC table, a TES / ATM interface unit that controls data exchange with an ATM network, and a TES / ATM call control that controls call control processing of the ATM. That monitors and controls the TES storage unit, the TES / ATM interface unit, and the TES / ATM call control unit
An S control unit and a TEC service state storage unit that holds a service management table storing the latest service state data sent from each TEC in combination with a TEC identifier. TEC / ATM interface for controlling the exchange of data between the two, TEC / ATM call control for controlling the ATM call control, TEC / ATM interface and TEC / ATM
It has a configuration including a TEC control unit that monitors and controls the call control unit and a service state transmission unit that transmits the latest service state to the TES in real time.

[0013] Thereby, the TEC can execute the TE in real time.
By transmitting the service status to S, an ATM private branch exchange system that enables the TES to manage the TEC service status in the management table is obtained.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention provides a plurality of TECs for performing voice communication and a TE for performing call control.
An ATM private branch exchange system in which a C identifier and a TES for storing an ATM address of a TEC of a TEC identifier in association with each other are arranged on an ATM network.
Is a TES storage unit that holds a TEC table, and an ATM
TES that controls data exchange with the network
An ATM interface unit, a TES / ATM call control unit that manages ATM call control processing, a TES storage unit, and a TES / A
A TES control unit that monitors and controls the TM interface unit and the TES / ATM call control unit, and a service management table that stores the latest service status data sent from each TEC in combination with a TEC identifier A TEC service status storage unit, and the TEC is a TEC / ATM which controls data exchange with the ATM network.
Interface section and TEC for ATM call control processing
An ATM call control unit, a TEC control unit that monitors and controls the TEC ATM interface unit and the TEC ATM call control unit, and a service state transmission unit that transmits the latest service state to the TES in real time; In response to a communication request from the TEC, the TES searches the service management table for the service state of the partner TEC, and determines whether communication is possible at the stage when the TEC transmits a data channel setting request to the TES. It has the action of:

According to a second aspect of the present invention, in the first aspect of the present invention, the TEC service state storage unit stores
When call rejection is set in, control service data indicating that call rejection is being transmitted in real time from the TEC is registered in the service management table. On the other hand, it is possible to determine that communication is impossible by searching for control service data indicating that the incoming call is rejected in the service management table.

The third aspect of the present invention is the first or second aspect.
In the invention described in the above, the TEC service status storage unit comprises:
When the call interruption rejection is set by TEC, T
Operation service data transmitted during real time from the EC and indicating that call interruption is being rejected is registered in the service management table. In response to a call request from another TEC, the call interruption request in the service management table is registered. It is possible to determine that the communication is impossible by searching for the operation service data indicating that the connection is rejected.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a block diagram showing an ATM private branch exchange system according to Embodiment 1 of the present invention.

In FIG. 1, reference numeral 123 denotes a TES, 124 denotes a TES storage unit for holding a TEC table, and 125 denotes an AT.
TES / ATM call control unit which controls the call control of M, 126 is A
A TES / ATM interface unit 127 for exchanging data with the TM network 147 is provided for each TE.
The latest service status data sent from C
A TEC service status storage unit 128 for storing a service management table stored as a pair with an identifier, a TES storage unit 124, a TES / ATM interface unit 126, and a TE
The TES control unit monitors and controls the S / ATM call control unit 125 and the TEC service status storage unit 127. Also,
Reference numerals 129 and 137 denote TEC / ATM interface units for controlling exchange of data with the ATM network 147; 130 and 138 denote service state transmission units for transmitting the latest service state to the TES 123 in real time;
Reference numerals 1 and 139 denote TEC / ATM call controllers for controlling ATM call control, and 132 and 140 denote TEC / ATM interface units 129 and 137 and service state transmitting units 130 and 13.
8 and TEC / ATM call control units 131 and 139 and T
EC storage units 133 and 141 and a voice input unit 135 described later,
A TEC control unit 133, 141 for monitoring and controlling an audio output unit 136, 144 described later and an audio processing unit 134, 142 described later is used as a TEC storage unit for temporarily storing the captured audio. Speech processing units 135 and 143 control sound processing, and sound input units 136 and 144 control sound output.
45 and 146 are TECs.

The operation of the ATM private branch exchange system configured as described above will be described with reference to FIGS. FIG. 2 is a table diagram showing a service management table for control service data, and FIG. 3 is a table diagram showing a service management table for operation service data.

The TEC 145 sets a PP bi-directional VCC to the TES 123 to transmit the changed service data. However, at this time, TEC 145 is TES1
It is assumed that 23 ATM addresses are known.
After that, the TES 123 sets a point-to-multipoint VCC (hereinafter, referred to as “P-MPVCC”) to the TEC 145. When the TEC 145 sets the PP bidirectional VCC with the TES 123, the TEC 145 uses the PP bidirectional VCC from the service state transmitting unit 130 via the TEC / ATM interface unit 129 and uses the PP bidirectional VCC.
It transmits the C identifier and the changed service data to the TES 123. When the TES 123 receives the TEC identifier and the change service data from the TEC 145, the TES 123 updates the data in the service management table of the TEC service status storage unit 127 by associating them.

The service management table relating to the control service data shown in FIG. 3 will be described. As mentioned above, T
When the ES 123 receives the TEC identifier and the change service data from the TEC 145, the ES 123 associates the
The data in the service management table of FIG. 3 of the service status storage unit 127 is updated. FIG. 3 shows that incoming call rejection is set in the control service setting of the TEC whose TEC identifier of registration number 1 is “145”. next,
The operation related to the TEC 146 will be described.

When TEC 146 wants to communicate with TEC 145, TEC 145 sets up a PP bi-directional VCC.
The TEC 146 uses the PP bi-directional VCC to
5 is transmitted to the TES 123.
The TES 123 that has received the data channel setting request is shown in FIG.
The control service setting of the TEC 145 is checked with reference to the service management table of FIG. As shown in FIG.
Is set to reject incoming call, so TES123
Determines that the TEC 145 is unable to communicate, and uses the PP bi-directional VCC to send TEC communicable information indicating that the TEC 146 cannot communicate with the TEC 145.
146. The TEC 146 that has obtained the transmitted communication-disabled information does not make a call to the TEC 145 because it is determined that the TEC 145 is unable to communicate. At this time, if the terminating rejection is not set in the TEC 145, the TES 123 sends the TE
The ATM address of C145 is transmitted.

Next, the service management table for the operation service data shown in FIG. 4 will be described. As described above, when the TES 123 receives the TEC identifier and the changed service data from the TEC 145, the TES 123 updates the data in the service management table of the TEC service status storage unit 127 in FIG. FIG. 4 shows that the call interruption rejection is set in the operation service setting of the TEC whose TEC identifier of the registration number 1 is “145”. Next, an operation related to the TEC 146 will be described. If TEC 146 wants to communicate to TEC 145, T
The EC 145 sets the PP bidirectional VCC. TEC1
46 transmits a data channel request with the TEC 145 to the TES 123 using the PP bidirectional VCC. The TES 123 that has received the data channel setting request checks the operation service setting of the TEC 145 with reference to the service management table of FIG. As shown in FIG. 4, “interruption rejection during call” is set in the TEC 145, so that the TES 123
The TEC 145 determines that the TEC 145 is unable to communicate, and uses the PP bi-directional VCC, and the TEC 146 transmits TEC 14 information indicating that it cannot communicate with the TEC 145.
Send to 6. TE that got the transmitted communication inability information
The C 146 does not make a call to the TEC 145 because it has been determined that the TEC 145 cannot communicate. At this time, if the call interruption rejection is not set in the TEC 145, the TES 123 sends the TE
The ATM address of C145 is transmitted.

As described above, according to the present embodiment, TE
In S123, the service state of the partner TEC 145 is searched from the service management table of the TEC service state storage unit 127 in response to the communication request from the TEC 146. It can be determined whether communication is possible.

The TEC service status storage unit 127
When the call rejection is set by the TEC 145, the control service data transmitted in real time from the TEC 145 indicating that the call is rejected is registered in the service management table. In response to this, it is possible to determine that communication is impossible by searching for control service data indicating that the incoming call is rejected in the service management table.

Further, the TEC service status storage unit 127
When the call interruption rejection is set by the TEC 145, the operation service data indicating that the call interruption rejection is being transmitted in real time from the TEC 145 is registered in the service management table. Other TEC1
In response to the call request from 46, it is possible to determine that communication is not possible by searching for operation service data indicating that call interruption is rejected in the service management table.

[0027]

As described above, according to the ATM private branch exchange system of the first aspect of the present invention, a plurality of TECs for performing voice communication, a TEC identifier for performing call control, and an ATM address of the TEC of the TEC identifier are provided. T that is stored in association with
An ATM private branch exchange system in which an ES and an ES are arranged on an ATM network, wherein the TES is a TES storage unit that holds a TEC table, a TES / ATM interface unit that manages exchange of data with the ATM network, and an ATM. TES / ATM call control unit that controls the call control processing of the TES, a TES control unit that monitors and controls the TES storage unit, the TES / ATM interface unit, and the TES / ATM call control unit, and the latest TES sent from each TEC. A TEC service state storage unit for holding a service management table storing service state data in pairs with TEC identifiers, wherein the TEC is a TEC / ATM interface unit for controlling data exchange with an ATM network. And A
A TEC / ATM call control unit for controlling the call control of the TM;
By having a TEC control unit for monitoring and controlling the EC / ATM interface unit and the TEC / ATM call control unit, and a service status transmission unit for transmitting the latest service status to the TES in real time, the TES can receive from the TEC. Since the service status of the partner TEC can be searched from the service management table by the communication request, it is possible to determine whether or not communication is possible at the stage when the data channel setting request is transmitted from the TEC to the TES. can get.

According to the invention described in claim 2, according to claim 1,
In the invention described in the above, the TEC service status storage unit comprises:
When incoming call rejection is set by the TEC, control service data indicating that incoming call rejection is being transmitted in real time from the TEC is registered in the service management table. An advantageous effect is obtained in that it is possible to determine that communication is impossible by searching for control service data indicating that the incoming call is rejected in the service management table.

According to the invention described in claim 3, according to claim 1
In the invention according to the second aspect, the TEC service status storage unit may include an operation service indicating that a call interruption rejection is being transmitted in real time from the TEC when the call interruption rejection is set by the TEC. By registering the data in the service management table, in response to a call request from another TEC, it is possible to determine that communication is impossible by searching for operation service data indicating that call interruption is rejected in the service management table. Effects can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an ATM private branch exchange system according to a first embodiment of the present invention.

FIG. 2 is a table diagram showing a service management table relating to control service data;

FIG. 3 is a table diagram showing a service management table relating to operation service data;

FIG. 4 is a block diagram showing a conventional ATM private branch exchange system.

[Explanation of symbols]

 123 TES 124 TES storage unit 125 TES / ATM call control unit 126 TES / ATM interface unit 127 TEC service state storage unit 128 TES control unit 129, 137 TEC / ATM interface unit 130, 138 Service state transmission unit 131, 139 TEC / ATM Call control units 132, 140 TEC control units 133, 141 TEC storage units 134, 142 Audio processing units 135, 143 Audio input units 136, 144 Audio output units 145, 146 TEC

Claims (3)

[Claims] 1. A plurality of TECs for performing voice communication, a TEC identifier for performing call control, and an ATM of the TEC of the TEC identifier.
An ATM private branch exchange system in which a TES that stores addresses in association with each other is arranged on an ATM network, wherein the TES is a TES storage unit that holds a TEC table, and stores data between the TES table and the ATM network. TES / ATM interface section that controls exchanges and AT
A TES / ATM call controller for controlling the M call control process, and a TES for monitoring and controlling the TES storage unit, the TES / ATM interface unit, and the TES / ATM call controller.
A control unit, and a TEC service state storage unit for storing a service management table storing the latest service state data sent from each TEC in a pair with the TEC identifier, wherein the TEC includes the ATM. TEC / ATM interface for controlling data exchange with the network, and TEC / AT for controlling ATM call control
A TEC for monitoring and controlling the M call controller, the TEC / ATM interface, and the TEC / ATM call controller;
An ATM private branch exchange system comprising: a control unit; and a service status transmission unit that transmits the latest service status to the TES in real time. 2. The system according to claim 2, wherein said TEC service status storage unit stores said T
When EC rejection is set, the TEC
2. The ATM private branch exchange system according to claim 1, wherein control service data indicating that the incoming call is being rejected and transmitted in real time is registered in the service management table. 3. The TEC service status storage unit includes:
When the call interruption rejection is set in the EC, operation service data indicating that the call interruption rejection is being transmitted in real time from the TEC is registered in a service management table. A according to item 1 or 2
TM private branch exchange system.