JPS61248641A - Call-connecting system by information of terminal-equipment-attribute - Google Patents

Abstract

PURPOSE:To provide free use by a subscriber of a communication channel allocated to a value added equipment by providing a communication-line forming equipment between a line switcher and the value added equipment and by storing an information showing the correspondence between terminal-equipment-attribute and the I/O port in said forming-equipment. CONSTITUTION:The value added equipment VAP is connected to the line switcher SW via a channel memory CHM. A channel memory setting equipment CST stores the information showing the correspondence between the terminal equipment attribute and the I/O port of the equipment VAP. When enjoying a service of the equipment VAP using a terminal equipment T1, the subscriber sends a selection signal to the switcher SW in order to select one channel from a communication channel group CG allocated to the equipment VAP. The switcher SW connects communication channels C1 and Ci, and transmits a control signal to inform the arrival of a call from the terminal equipment of terminal attribute At1 at the channel Ci to the equipment CST through a call control signal line CPCTL. The CST selects an optional port PG1j from an I/O port group PG1 that coincides with the attribute At1, and directs an equipment CHM to connect with the channel Ci.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a call connection system based on terminal attribute notification of a value-added device.

[Conventional technology]

Conventionally, each input/output port of a value-added device is fixedly connected to a communication channel of a circuit switching device. Therefore, in order for a subscriber to receive the services of a value-added device, it is necessary to select the input/output port of the value-added device that matches the terminal attributes that define the terminal operation, such as the character code used, communication speed, single-handed character display, and so on. , power, ■ The input signal sends an appropriate selection signal to the line switching device in order to select the speech channel that permanently corresponds to the input/output port. An example of a conventional value-added device connection method will be described with reference to FIG. In FIG. 2, a circuit switching device SW having a function of recognizing the attributes of subscriber terminals at the time of call setup is connected to a terminal T1 having a terminal attribute Δt1 and a terminal T2 having a terminal attribute At2 via call channels C, , C2, respectively. has been done. Further, the value-added device VAP has PGl as an input/output port group that matches the terminal attribute At, and PO2 as a port group that matches the terminal attribute At2, each of which has a communication channel group CG1.
, CG2 to the line switching device SW.

With the above configuration, when a subscriber attempts to receive the service of the value-added device VAP using the terminal TI, the terminal attribute At
It is necessary to connect the terminal TI to one of the input/output ports of the input/output port group PCI that matches , (in the figure, this connection is shown by a dotted line in the line switching device SW). This operation is realized by sending a selection signal to the line switching device SW to select one of the communication channels of the communication channel group CGI corresponding to the input/output port group PG1.

Furthermore, if the terminal T1 is connected to the call channel group CG2 corresponding to the port group PG2 that matches a different terminal attribute At2 (in the figure, this connection is indicated by a dashed line in the line switching device SW), it is natural that the value-added device services are not available.

[Problem that the invention seeks to solve]

In the conventional connection method for value-added devices, the input/output port of the value-added device was fixedly connected to the communication channel of the circuit switching device. The subscriber himself must know to which communication channel an input/output port that matches the attributes corresponds.

In addition, if some input/output ports of a value-added device can be connected to terminals with multiple terminal attributes, use input/output ports that can connect to terminals with multiple terminal attributes even if other input/output ports are sufficient. This has the disadvantage that only the usage rate of the input/output port increases, making it difficult to efficiently use all the input/output ports of the value-added device.

[Means for solving problems]

An object of the present invention is to provide a call connection method using terminal attribute notification that solves the above-mentioned problems.

The present invention relates to a circuit switching device having a function of recognizing the attributes of a subscriber terminal at the time of call setup, and a system for performing data communication with an unspecified number of subscribers of this circuit switching device via a communication channel of the circuit switching device. In a call connection method using terminal attribute notification between a value-added device having multiple input/output ports, a communication path forming device is provided between the circuit switching device and the value-added device, and a terminal By storing correspondence information indicating the correspondence between attributes and input/output ports, and providing terminal attribute information and communication channel information to the communication path formation device when a call is set up from the terminal by the circuit switching device, the communication path formation device can determine the terminal attributes. By referring to the information and the corresponding information to select an input/output port corresponding to the call and forming a communication path between the communication channel and the input/output port, one of the input/output ports of the terminal and the value-added device is selected. The feature is that a communication path between the two is set up.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. This embodiment is an example in which the communication path forming device includes a channel memory setting device and a channel memory device. As in the past, the line switching device SW has a function of recognizing terminal attributes, and is connected to the terminal TI with the terminal attribute At, and the terminal T2 with the terminal attribute At2 via call channels CI and C2, respectively. . Further, the value-added device VAP has PCI as an input/output port group that matches the terminal attribute At, PO2 as a port group that matches the terminal attribute Δt2, and is connected to the line switching device SW via the channel memory device CHM. This channel memory device CHM is connected to the circuit switching device SW by the call channel group CG, and to the channel memory setting device C by the channel memory setting control line CHCTL.
Connected to 3T.

Furthermore, the channel memory setting device C3T uses the call control signal line C
It is connected to line switching device SW by PCTL.

The channel memory setting device C3T stores correspondence information indicating the correspondence between terminal attributes and input/output ports of the value-added device VAP, and stores correspondence information indicating the correspondence between terminal attributes and input/output ports of the value-added device VAP. When the information is given, the input/output port corresponding to the call is selected by referring to the terminal attribute information and the stored correspondence information, and an instruction is given via the channel memory setting control line CHCT L.

The channel memory device CHM stores one communication channel in the communication channel group CG and the value-added device V according to its instructions.
Connect to one of the input/output ports of the AP.

With the following configuration, the service of the value-added device VAP is transferred to the terminal T.
1, the subscriber sends a selection signal to the line switching device SW to select one of the call channel groups CG assigned to the value-added device ■ΔP.

The line switching device SW connects the communication channel CI connected to the terminal T1 and the communication channel C in the communication channel group CG.
1 (in the figure, this connection is indicated by a dotted line inside the line switching device SW), and the call channel group C is connected to the channel memory setting device C8T via the call control signal line CPCTL.
A control signal indicating that a call has been received from a terminal with terminal attribute At+ is sent to communication channel C1 in G. Channel memory setting device C
3T is the input/output port group PCI that matches the terminal attribute At.
PGl'' from the list, and select the channel memory device CHM to connect it to the communication channel Ci.
is instructed via the channel memory setting control line CHCTL.

Channel memory device CHM connects speech channel C1 and input/output port PG1 according to the instructions (in the figure,
This connection is shown as a dotted line in channel memory device C8M)
. Furthermore, when the subscriber uses the terminal T2, if a selection signal is sent to the line switching device SW in exactly the same way, the channel memory setting device C3T selects any input/output port PC2j from the input/output port group PG2 that matches the terminal attribute At2. , a channel memory device CH to be connected to the communication channel C1.
Instruct M (this connection status is indicated by a dashed line in the diagram)
.

Next, input/output port group PG2 of value-added device VAP is set to terminal attribute Δt1. Call connection when connection is possible with Δt2 will be described. The channel memory setting device C3T is designed to have logic for selecting from a necessary and sufficient group of ports. That is, first, it is selected from the input/output port group PCI, and if all of them are in use, it is selected from the input/output port group PG2. By doing so, it is possible to efficiently use all the input/output ports without increasing the usage rate of only the input/output port group PC2.

〔Effect of the invention〕

As explained above, the present invention enables the use of value-added devices by having the communication path forming device select a communication channel and appropriate input/output ports based on the terminal attributes notified by the circuit switching device, and connect them. A subscriber can freely use the communication channel assigned to the value-added device without depending on the terminal attributes of the calling terminal.

Furthermore, since the selection is made from a necessary and sufficient group of ports, there is little division loss due to port division, and ports can be used efficiently.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a connection method for a value-added device according to the present invention, and FIG. 2 is a diagram showing a connection method for a conventional value-added device. SW...Line switching device C3T...Channel memory setting device CHM...Channel memory device YAP...Value-added device C, PCTL...Call control signal line CHCTL...Channel memory setting control line Tl, T2
...Terminal At, At2...Terminal attributes CG, CGI, CG2...Call channel group C1...
call channel

Claims (1)

[Claims] (1) A circuit switching device that has a function of recognizing subscriber terminal attributes at the time of call setup, and a plurality of circuit switching devices for performing data communication with an unspecified number of subscribers of this circuit switching device via communication channels of the circuit switching device. In a call connection method using terminal attribute notification between a value-added device and a value-added device having input/output ports, a communication path forming device is provided between the circuit switching device and the value-added device, and the communication path forming device includes terminal attribute notification. By storing correspondence information indicating the correspondence between input and output ports, and providing terminal attribute information and communication channel information to the communication path formation device when a call is set up from the terminal by the circuit switching device, the communication path formation device can transmit the terminal attribute information to the communication path formation device. and the corresponding information, select an input/output port corresponding to the call, and form a communication path between the communication channel and the input/output port, thereby connecting the terminal to one of the input/output ports of the value-added device. A call connection method based on terminal attribute notification, characterized in that a communication path between terminals is set.