JPH11122351A - Communication connection method and communication interface system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure the number of communication lines or channels for communication connection by a callback on a request of the callback. SOLUTION: A control section 4 of the communication interface system 1 identifies whether or not callback request information is included in a call control information element of an outgoing/incoming call, and when included, extension number information of a callback request source is detected and stored and other calls than the callback request source are rejected for a prescribed time by using a function of a timer section 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for transmitting a call from one side when a communication line is connected and automatically rejecting or disconnecting the other side, and then calling again from the other side. The present invention relates to a communication connection method for connecting a communication line, and a communication interface device.

[0002]

2. Description of the Related Art In general, when a call is made from one side when a communication line is connected, the other side automatically rejects or disconnects, and then connects again by calling again. This is already realized by a communication interface device such as a terminal adapter device.

When a call is made to a communication interface apparatus having a callback function, the caller transmits a call destination telephone number and a notification of a callback request to the call control information element group included in the call control information at the time of the call. Do. Here, the call control information element includes, for example, a calling address information element (source telephone number), a called address information element (destination telephone number),
Calling subaddress information element (calling source subaddress number:
This can also be used for terminal designation numbers, etc.), user / user information elements (user information), and the like.

A communication interface device having a callback function refers to a group of call control information elements included in call control information at the time of an incoming call, and detects a caller's telephone number and a notification of a callback request. Once rejects or disconnects the connection, and then calls back to the caller's phone number.

[0005]

However, the communication terminal other than the callback request source or the callback request source is
It can be used when responding to an incoming call from a destination other than the callback request after a callback request, or when a communication terminal other than the call-back request source makes a call before receiving an incoming call from the callback request destination. A communication line or a communication channel is blocked, so that there is a problem that an incoming call from a callback request destination cannot be received.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and has as its object to secure the number of communication lines or communication channels for communication connection by callback at the time of a callback request.

[0007]

In order to solve the above-mentioned problem, the invention according to claim 1 is characterized in that, when a communication line is connected, if a call is made from one side, the connection is automatically rejected or disconnected to the other side, and then the call is made. In the communication connection method for connecting the communication line by re-reading, the call control information element at the time of outgoing is detected,
By referring to the information, a callback request and the extension number information of the callback request source are detected and stored, and an incoming call from a destination other than the callback request destination is rejected for a certain period of time.

According to a second aspect of the present invention, in the first aspect, a terminal port number of a callback request source is detected and stored, and an outgoing call connection from a terminal port other than the terminal port number is transmitted. This is to reject for a certain period of time.

[0009] The invention described in claim 3 is the first invention.
Or, in the second communication connection method, the number of vacant communication lines or the number of communication channels of the accommodated communication lines is managed. And calls originating from communication terminals other than the callback request source,
This is to reject for a certain period of time.

[0010] According to the invention described in claim 4, in the communication connection method according to any one of claims 1 to 3, the time for rejecting an incoming call other than a specific number can be set shorter,
It is set to be long or set arbitrarily.

According to a fifth aspect of the present invention, in a communication interface device having a callback function, a call control information element of an outgoing / incoming call is referred to, and the referred call control information element includes callback request information. Identification means for identifying whether or not the call request has been made; detection means for detecting a callback request destination telephone number and a calling terminal port number from a call control information element containing callback request information; and Storage means for storing; comparing means for comparing the stored number information with the number information of newly generated incoming and outgoing calls; rejection for rejecting a newly generated call connection for a certain period of time if the comparison results in a mismatch Means for registering a time at which the call connection is refused, a stopping means for stopping activation during the registered time, and detecting expiration of the registered time. It is obtained by a timer unit having a detecting means for.

Further, according to a sixth aspect of the present invention, the control unit stores the number of vacant lines of the communication line to be accommodated, compares the number of vacant lines with a preset number of lines when receiving a call, and When the number is smaller than a preset number of lines, the rejection means is operated.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Here, a source in the present invention,
The relationship between the destination and the communication interface device will be described with reference to FIG.

In FIG. 1, reference numeral 100 denotes a communication interface device according to the present invention, 200 denotes a communication terminal which is a transmission source among a large number of communication terminals connected to the communication interface device 100, and 300 denotes a communication terminal which is a transmission destination And the callback request from the transmission source 200 is
Is performed on the communication interface device 1 by the function of the communication interface device 100 as described later.
The call request is not accepted from another communication terminal connected to 00, and the call other than the incoming call from the call destination 300 is not accepted. The transmission source 200 becomes a callback request source if a callback request is made, and at this time, the transmission destination 300 becomes a callback request destination. Less than,
First to third embodiments of the present invention will be sequentially described.

[First Embodiment] A first embodiment of the connection sequence of the communication connection method of the present invention will be described below with reference to FIGS. Note that (1) to (11), (2)
1) to (29) show each step, and a series of controls are performed in FIG. 2 and FIG.

In FIG. 2, when a call request is received (1), it is determined whether a callback request is being made or not (2). When a callback request is not made, the result is included in the call control information. (3) as a result of determining whether or not a callback request (a request from another communication terminal connected to the communication interface device) is included by referring to the group of call control information elements to be transmitted, where the callback request is included , A timer is started (4), the transmission source port number is stored (5), and after storing the destination telephone number (6), the transmission is permitted (7).

In step (3), it is determined whether a callback request is included by referring to the call control information element group included in the call control information. Authorization is performed (8).

As a result of determining whether or not a callback request is being made (2), if a callback request is being made, the call is rejected for a certain period of time (10) unless the timer expires (9). If the timer has expired (9), transmission is permitted (11).

In FIG. 3, when an incoming request is received (21), it is determined whether or not a callback request is being made (22).
An incoming call notification is made (29).

As a result of determining whether or not a callback request is being made (22), if a callback request is being made,
Referring to the call control information element group included in the call control information, it is determined whether or not the call is from the callback request destination (23). If the call is not the callback request destination, the timer is not expired (26). The incoming call is rejected (27). If the timer has expired (26), an incoming call notification is made (28).

Referring to the call control information element group included in the call control information, it is determined whether or not there is an incoming call from the callback request destination (23). In the case of the callback request destination, the timer is stopped (24). ), An incoming call notification is made (25).

In the first embodiment, not only the telephone number of the callback request destination but also the terminal port number of the callback request source is detected and stored as shown in step (5) as the call control information element. Alternatively, an outgoing call connection from a terminal port other than the terminal port number may be rejected for a certain period of time.

Second Embodiment FIGS. 4 and 5 are flowcharts showing a second embodiment of the present invention.
(1) to (13) and (21) to (33) show each step. Then, a series of controls are performed in FIG. 4 and FIG.

In FIG. 4, if a call request is received (1), it is determined whether or not a callback request is being made (2). If no callback request is being made, the call control information is included. As a result of referring to a group of call control information elements to be called and determining whether or not a callback request is included (3), if a callback request is included, a timer is started (4), and a destination telephone number is stored. After performing (5), transmission is permitted (6), and the number of communication channels is decremented by one (7).

As a result of referring to the call control information element group included in the call control information and determining whether or not the callback request is included (3), if the callback request is not included,
Transmission is permitted (8), and the number of communication channels is decremented by one (9).

As a result of determining whether a callback request is being made (2), if a callback request is being made, it is determined whether the number of idle communication channels is two or more (1).
0) If it is not 2 or more, reject the call (1)
1) If the number is 2 or more, the call is permitted (1)
2) Subtract 1 from the number of transmission channels (13).

In FIG. 5, when an incoming call is detected (21), it is determined whether or not a callback request is being made (22). When no callback is being requested, an incoming call notification is made (23). ), Decrement the number of communication channels by 1 (24).

As a result of determining whether or not a callback request is being made (22), if a callback request is being made,
Referring to the call control information element group included in the call control information, it is determined whether or not there is an incoming call from the callback request destination (25). If the call request is not the callback request source, the number of idle communication channels is two or more. It is determined whether or not the timer is expired (26), and if it is not 2 or more, it is determined whether or not the timer has expired (2).
7) If the timer has not expired, call rejection is performed (28).

It is determined whether or not the number of idle communication channels is 2 or more (26). If it is 2 or more, it is determined whether or not the timer has expired (27). An incoming call notification is made (29), and the number of communication channels is decremented by one (3)
0).

Referring to the call control information element group included in the call control information, it is determined whether or not there is an incoming call from the callback request destination (25). In the case of the callback request destination, the timer is stopped (31). ), An incoming call notification is made (32), and the number of communication channels is decremented by one (33).

[Third Embodiment] FIG. 6 is a block diagram showing a configuration example of a communication interface device according to the present invention. Here, ISDN (2 × B
Channel + D channel) as an example.

In FIG. 1, reference numeral 1 denotes one or more ISDN lines.
A communication interface device that accommodates a line and has a function of transmitting and receiving data and control signals and converting received and transmitted data and control signal formats with a communication device having an R point interface unit and an analog port interface unit. is there.

In the communication interface apparatus 1, 2 accommodates one or more ISDN lines, and
A network interface unit that controls the network by a control signal specified by the network interface. 3 is RS-2
An R-point interface unit that is connected to a device such as a personal computer via an interface such as 32C and transmits and receives data and control signals. Reference numeral 4 denotes a control unit for performing ISDN call control and the like. The control unit 4 transmits and receives control information to and from the analog port interface unit 6, the R point interface unit 3, and the network interface unit 2, and executes the operation flows shown in FIGS.

Reference numeral 5 designates a format conversion of the data received from the R-point interface unit 3 and transmits the data to the network interface unit 2, and a format conversion of the data received from the network interface unit 2. This is a data frame control unit to be transmitted to.

An analog port interface unit 6 accommodates an analog communication terminal having an analog network interface and converts an analog signal into a digital signal and converts a digital signal into an analog signal. The analog port interface unit 6 controls transmission and reception and the like with a communication device 10 such as an analog communication terminal, and transmits and receives information at the time of transmission and reception with the control unit 4. Reference numeral 7 denotes a timer unit having a timer value storage unit for storing a timer value registered via the R point interface unit 3 or the analog port interface unit 6.

FIG. 7 is a diagram showing details of the control unit 4 in FIG. In this figure, reference numeral 41 denotes an identification means which refers to a call control information element of an outgoing / incoming call and identifies whether or not the referred call control information element includes callback request information. Reference numeral 42 denotes detection means for detecting the telephone number of the callback request destination and the connection port number of the calling terminal from the call control information element containing the callback request information. A storage unit 43 stores the number information detected by the detection unit 42. 4
Reference numeral 4 denotes comparison means for comparing the number information stored in the storage means 43 with the number information of newly generated incoming and outgoing calls.
Reference numeral 45 denotes rejection means. If the result of comparison by the comparison means 44 does not match, a call connection newly generated for a predetermined time is rejected. It does not work if the comparison results match.

FIG. 8 is a diagram showing details of the timer section 7 in FIG. In this figure, reference numeral 71 denotes registration means for registering a time for rejecting a call connection. Numeral 72 denotes a stopping means for stopping the activation for the registered time. 73 is a detecting means for detecting expiration of the registered time.

With the above configuration, the communication interface device performs the operations shown in the flowcharts of FIGS. 2, 3, 4, and 5 described above.

[0039]

According to the communication connection method of the present invention, in the communication connection method using the callback function, when the call control information element of the outgoing call is identified and the callback request information is detected from the call control information element, Since the telephone number of the callback request destination is stored and incoming call connection by a telephone number other than the callback request destination is rejected for a certain period of time, when a callback request is made, an incoming call from a source other than the request source is rejected for a certain period of time. If the number of available communication lines or communication channels is 1 or less, reject incoming calls from parties other than the requester for a certain period of time to secure the number of communication lines or communication channels for communication connection by callback. Becomes possible.

Further, a terminal port number of a callback request source is detected and stored from the call control information element,
Since outgoing call connection from a terminal port other than the terminal port number is rejected for a certain period of time, control by the terminal port is possible.

Further, when an outgoing / incoming call is made, an idle / busy state of the accommodated communication line is detected, and if the number of available lines is smaller than a preset number of lines, the incoming call connection and the outgoing call connection are rejected for a certain period of time. The number of communication circuits or communication channels for communication connection by callback can be secured.

Also, since the fixed time can be set arbitrarily,
This can be handled by a timer or the like.

Further, the communication interface device according to the present invention, in a communication interface device having a callback function, refers to a call control information element of an outgoing / incoming call,
Identification means for identifying whether or not the referred call control information element includes the callback request information; and, from the call control information element including the callback request information, the callback request destination telephone number, the calling terminal port number, and the like. Detecting means for detecting the number, storage means for storing the detected number information,
A control unit comprising: a comparing unit that compares the stored number information with the number information of a newly generated incoming and outgoing call; and a rejecting unit that rejects a newly generated call connection for a predetermined period of time if the comparison results in a mismatch. A registration unit for registering a time for rejecting the call connection, a stop unit for stopping activation for the registered time, and a timer unit having a detection unit for detecting expiration of the registered time, and The control unit stores the number of vacant lines of the communication line to be accommodated, compares the number of vacant lines at the time of receiving a call with a preset number of lines, and when the number of vacant lines is smaller than the preset number of lines, the rejection unit Is operated, so that the communication connection method can be reliably realized.

[Brief description of the drawings]

FIG. 1 is a diagram for explaining the relationship between a source, a destination, and a communication interface device that controls a connection for performing a communication connection.

FIG. 2 is a flowchart illustrating an embodiment of a communication connection method according to the present invention.

FIG. 3 is a flowchart illustrating an embodiment of a communication connection method according to the present invention.

FIG. 4 is a flowchart showing another embodiment of the communication connection method of the present invention.

FIG. 5 is a flowchart showing another embodiment of the communication connection method of the present invention.

FIG. 6 is a block diagram showing a configuration of one embodiment of a communication interface device of the present invention.

FIG. 7 is a block diagram illustrating details of a control unit in FIG. 6;

FIG. 8 is a block diagram showing details of a timer unit in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Communication interface device 2 Network interface unit 3 R point interface unit 4 Control unit 41 Identification unit 42 Detection unit 43 Storage unit 44 Comparison unit 45 Rejection unit 5 Data frame control unit 6 Analog port interface unit 7 Timer unit 71 Registration unit 72 Stop unit 73 Detecting means

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Kozo Kobayashi Nippon Telegraph and Telephone Corporation 3-19-2 Nishishinjuku, Shinjuku-ku, Tokyo

Claims (6)

[Claims] In a communication connection method using a callback function, a call control information element of an outgoing call is identified, and when callback request information is detected from the call control information element, a telephone number of a callback request destination is stored. A communication connection method for rejecting an incoming call connection by a telephone number other than the callback request destination for a predetermined time. 2. The communication according to claim 1, wherein a terminal port number of a callback request source is detected and stored, and outgoing call connection from a terminal port other than the terminal port number is rejected for a predetermined time. Connection method. 3. An outgoing / incoming call, wherein an idle / busy state of a communication line to be accommodated is detected, and the incoming call connection and the outgoing call connection are rejected for a certain period of time when the number of available lines is smaller than a preset number of lines. The communication connection method according to claim 1 or 2, wherein 4. The communication connection method according to claim 1, wherein the predetermined time is set arbitrarily. 5. A communication interface device having a callback function, which refers to a call control information element of an outgoing / incoming call and identifies whether or not the referred call control information element includes callback request information. Means for detecting a callback request destination telephone number from a call control information element including callback request information, and a port number of a calling terminal connected to the communication interface device; and the detected number Storage means for storing information; and comparing means for comparing the stored number information with the number information of newly generated incoming and outgoing calls. If the result of the comparison shows that they do not match, the newly generated call connection is rejected for a certain period of time. A control unit having rejection means for registering, a registration means for registering a time at which the call connection is rejected, a stop means for stopping activation during the registered time, A communication interface device comprising: a timer unit having detection means for detecting expiration of time. 6. The control unit stores the number of vacant lines of a communication line to be accommodated, compares the number of vacant lines at the time of receiving a call with a preset number of lines, and determines that the number of vacant lines is smaller than the preset number of lines. 6. The communication interface device according to claim 5, wherein in the case, the rejection unit is operated.