JPH082070B2 - Telephone switching network connection control method for communication control equipment - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a telephone switching network connection control system of a communication control device in a data communication system using a telephone switching network.

[Prior art]

FIG. 3 is a schematic diagram showing the position of the communication control device in the data communication system. Reference numeral 10 is a high-order processing device, 11 is a communication control device, 12 is a modulation / demodulation device group, 13 is a telephone switching network, and 14 is a partner terminal. Conventionally, for making a call to the telephone switching network 13 in the communication control device 11, for example, CCITT V.
A call control modem that conforms to 25 has been used.
In this modulation / demodulation device, a call is made using the "V.24, 200 series" interconnection circuit, and after the other party's calling is completed, the "V.24, 100 series" interconnection circuit communicates. The V.25-compliant modulator / demodulator (hereinafter abbreviated as V.25 modulator / demodulator), which is a typical example of the call control modulator / demodulator, includes "V.24, 200 series" and "V.24, 100 series". There are two types: a single type that has a set of each interconnection circuit, and a collective type that aims to make the equipment economical by sharing the "V.24, 200 series" interconnection circuit with multiple lines. The small-scale communication control device, the latter is used in the large-scale communication control device. On the other hand, there are many types of communication control procedures, and it is generally necessary for the communication control device 11 to realize mixed use of a plurality of communication control procedures according to a communication partner. To address these conditions in common, V.
A communication control device using a 25 modulator / demodulator normally employs the following configuration, which is outlined in FIG.

 Each communication control procedure has a dedicated communication control unit 4.

The call control unit 3 is separated from the communication control unit 4 so that the call control function can be shared among a plurality of communication control procedures.

Corresponding call origination / communication control unit for each interconnection circuit 30, 40
Set the management table 2 that holds the definition information of 3 and 4 and the control state information of the interconnection circuit.

Interconnection circuit identification information to be used is added to a call or communication instruction issued by the higher-level processing device 10 to the communication control device 11, and a predetermined control unit is identified from the management table unit 2 based on the information. It has a higher-level interface control unit 1 for notifying the control unit of the instruction.

In FIG. 4, the call control unit 3 and the V.24, 200 interconnection circuit 30
Are connected by a parallel interface, while the communication control unit 4 and the V.24,100 interconnection circuit 40 are connected by a serial interface.

On the other hand, in the background of recent advances in LSI technology, for call / communication control, which is based on the premise of enhancing the functionality of modulation / demodulation equipment, for example,
CCITT V.25bis recommendations were made. The V.25bis-compliant modulator / demodulator (hereinafter abbreviated as V.25bis modulator / demodulator), which is a typical example of a call / communication control modulator / demodulator, is characterized only by the "V.24, 100 series" interconnection circuit. The point is that you can call and communicate. Compared with the V.25 modulator / demodulator, the modulator / demodulator can reduce the number of interconnection circuits on the communication controller side, and is expected to occupy the mainstream in the future.

[Problems to be solved by the invention]

In the conventional communication control device configuration method, the call control unit and the communication control unit are separated on the assumption that the interconnection circuits used for calling and communication are different. When both control units use the same interconnection circuit as in the V.25bis modulator / demodulator as a typical example, there is a problem of resource competition between both control units, which is not applicable.

[Means for solving problems]

The present invention solves the problems of the prior art, and a modem for call control, for example, a V.25bis modulator / demodulator by utilizing a communication controller created for supporting a call control modem, for example, a V.25 modulator / demodulator. With financial support for equipment, V.25,
With the common support of both V.25bis calling methods, the purpose is to reduce the development cost of the communication control device and expand the scope of application.Calls are sent to the telephone switching network according to instructions from the host processing device, and communication is performed. In a communication control device for calling a partner and performing transmission / reception control of data according to a communication control procedure defined with a communication partner, the communication control device controls a modulator / demodulator used for transmitting / receiving data to / from the communication partner. An interconnection circuit for accommodating each signal line for performing data transfer with the modulation / demodulation device in the communication control device, definition information of a corresponding control unit for each interconnection circuit, and control state information of the interconnection circuit. The management table section possessed and a processing request from the host processor are accepted, and a predetermined control section is identified from the management table section based on the interconnection circuit identification information provided in the processing request. , A higher interface control unit for notifying the predetermined control unit, and controlling the interconnection circuit corresponding to each call origination system of call origination control and call origination / communication control to connect to the telephone switching network. Corresponding to the call control unit for each call method that performs call processing and the communication control procedure type,
Information relating to the call instruction from the higher-level processing unit is notified to the call control unit of the call / communication control method, and regarding the communication instruction, the interconnection circuit is controlled according to the instruction content. A plurality of communication control units for controlling transmission / reception of data, and use of any of the modulation / demodulation devices for call control or call / communication control depending on the combination of the two types of call control units and the communication control units. Also in the form, the data transmission / reception based on the communication control procedure by the combination is performed.

In the following description, the call control modem and the call / communication control modulator / demodulator according to the present invention will be described as a typical example of CCITT, V25 modulator / demodulator and V25bis modulator / demodulator. .

[Work]

Since the conventional configuration is premised on the support of the call control modem, for example, the V.25 modem, the call control unit does not accept the call request. The present invention makes use of this point, and as shown in FIG. 2, the V.25 communication control unit 4 has a call request acceptance function, a V.25bis call control unit 5 activation function based on a call request, etc. The communication control unit for V.25bis is configured by adding the interface matching mechanism 6 to the V.25bis call control unit of V.25bis, and the call control unit 5 and the communication control unit for the same interconnection circuits V.24 and 100. V.4 solves the problem of resource conflict between both control units due to access, and
Enables sharing of the communication control unit for both 25 and V.25bis calling systems. Embodiments will be described below with reference to the drawings.

〔Example〕

FIG. 1 shows a schematic configuration of a communication control device according to the present invention. The same reference numerals as those in FIG. 3 indicate the same parts. In FIG. 1, 1 is a high-level interface control unit, 2 is a management table unit corresponding to an interconnection circuit, 3 is a V.25 call control unit which is connected to the interconnection circuits V.24 and 200 by a parallel interface. Reference numeral 5 denotes a V.25bis call control unit connected to the interconnection circuits V.24 and 100 by a serial interface, and 7 has an interface matching mechanism for the V.25bis call control unit, which is a feature of the present invention. The communication control unit for V.25bis, 8 is an interconnection circuit V.24, 100. The operation will be described below in the case of using each of the V.25 and V.25bis modems.

The modulation / demodulation device is connected to the communication control device via each interconnection circuit. Also, the modulator / demodulator used depends on the communication control procedure. The management table section includes 1) correspondence between each type of call control section or communication control section and each interconnection circuit, 2) whether each interconnection circuit is in use, and 3) each interconnection circuit. It manages the state of each signal line via the like.

The above 1) and 2) are for selecting the interconnection circuit to be used and the corresponding call control unit or communication control unit when the higher interface control unit receives the call request or the communication request from the higher processing unit. Used to select and start. The above 3) is used by each call control section or communication control section to manage the state of each signal line through the interconnection circuit currently under the control of its own control section.

(A) When using V.25 modulator / demodulator In V.25, the interconnection circuit used for calling and communicating is for calling
Since V.24, 200 and communication V.24, 100 are different from each other, different call connection requests and communication requests received from the higher-level processing unit 10 have different interconnection circuit identification information. Host processor 10
When the call request is issued by the host, the upper interface control unit 1 acquires the interconnection circuit identification information in the received call request, refers to the management table unit 2, and refers to the usable V.24, 200 interconnections. Select the circuit and notify the call request V.
25 Select and activate the call control unit 3. The activated V.25 call control unit 3 calls the communication partner according to a predetermined call procedure using the designated interconnection circuit, and then the higher-level processing unit 10
Reply to Next, in response to the communication request made from the higher-level processing device 10, the higher-level interface control unit 1 stores the management table unit 2 based on the interconnection circuit identification information in the communication request, as in the call request. By referring to the information, an interconnect circuit that can be used for the communication request and is not in use is selected, and the predetermined communication control unit 7 is selected and activated. The communication control unit 7 performs communication control using the designated interconnection circuit.

(B) In the case of using V.25bis modulator / demodulator In V.25bis, the interconnection circuit used for call origination and communication is connected to each of the call control unit 5 and the communication control unit 7 by a serial interface. 24 and 100, which are the same, the same interconnection circuit identification information is attached to the call request and the communication request received from the host processor 10. When the host processor 10 makes a call request, the host interface controller 1 can acquire the interconnection circuit identification information in the received call request and refer to the management table 2 to use it for the communication request. , And the interconnection circuit which is not in use is selected, and the communication control unit 7 which takes over the corresponding processing request is selected and activated. The activated communication control unit 7 identifies the inherited call request, and when recognizing that the request is a call request, activates the V.25bis call control unit 5. Launched
The V.25bis call control unit 5 stores the return information to the call source communication control unit 7, calls the communication partner according to a predetermined call procedure, and then returns the call source information based on the stored return information. Control is returned to the communication control unit 7. The communication control unit 7 returns a response to the upper processing device.

Next, the communication request made from the host processor 10 is processed in the same manner as in (a).

〔The invention's effect〕

As described above, it is possible to support the V.25bis modulator / demodulator by utilizing the communication control unit created for the V.25 modulator / demodulator support. Here, the number of interfaces with the higher-level processing device relating to the call request is far smaller than the number of interfaces relating to the communication request which is different for each communication control procedure. Therefore, it is structurally simple to equip the existing communication control unit with an interface matching mechanism for the V.25bis call control unit, and further, the V.25bis call control unit side to the call source communication control unit. By providing a control function related to restoration, the V.25bis call control unit does not need to be aware of the difference between each communication control unit and can be shared among all communication control procedures as in V.25. .

As a result, in the communication control device, it becomes possible to quickly and economically support the V.25bis modulator / demodulator device, and in any usage mode of the V.25 or V.25bis modulator / demodulator device, any communication control procedure can be performed. It becomes possible to send and receive data based on.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of the configuration of a communication control device according to the present invention, and FIG.
The figure is compatible with both V.25 and V.25bis calling schemes according to the present invention
FIG. 3 is a diagram showing a configuration of a V.25bis communication control unit, FIG. 3 is a diagram showing a position of a communication control device in a data communication system, and FIG. 4 is a configuration concept of a conventional communication control device using a V.25 modulator / demodulator. FIG. 1 …… High-level interface control unit 2 …… Management table unit 3 …… V.25 call control unit 4 …… V.25 communication control unit 5 …… V.25bis call control unit 6 …… Interface matching Mechanism 7 …… V.25bis communication control unit 8 …… Interconnection circuit 10 …… High-level processing unit 11 …… Communication control unit 12 …… Modulator / demodulator group 13 …… Telephone switching network 14 …… Counterpart terminal 30,40… ... Interconnect circuits

Claims (1)

[Claims] 1. Communication in which call processing to a telephone switching network is performed in response to an instruction from a higher-level processing device to call a communication partner, and data transmission / reception control is performed according to a communication control procedure established with the communication partner. In the control device, the communication control device is a mutual control device for accommodating each signal line for controlling the modulation / demodulation device used for transmission / reception of data with a communication partner and for transferring data to / from the modulation / demodulation device. The connection circuit, the management table section that holds the definition information of the corresponding control unit for each interconnection circuit and the control state information of the interconnection circuit, and the processing request from the host processor are accepted and added in the processing request. A higher-order interface control unit that identifies a predetermined control unit from the management table unit based on the interconnection circuit identification information and notifies the predetermined control unit, and a call control and a call / communication control By controlling the interconnection circuit in accordance with the calling system, a calling control unit corresponding to each calling system that performs a calling process to the telephone switching network, and a communication control procedure type Information regarding a call instruction from the processing device is notified to the call control unit of the call / communication control method, and regarding the communication instruction, by controlling the interconnection circuit according to the instruction content, A plurality of communication control units that perform transmission / reception control are provided, and a combination of the two types of call control units and the communication control units enables call control or call / communication control in any mode of use of the modulation / demodulation device. Also performs data transmission / reception based on a communication control procedure based on the above combination, and is a telephone switching network control connection method for communication control devices.