JPH0325107B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a response display method when a plurality (for example, two sets) of communication paths are used at once in a digital integrated communication network.

In a digital integrated communication network, multiple communication channels are set up on a subscriber line, making it possible to carry out multiple communications in parallel.

In such a digital integrated communication network, for example, two sets of communication channels are set up between complex terminal devices that can transmit and receive audio and video in parallel, and a service that uses the two communication channels simultaneously (multiplex communication) becomes possible. In addition, within the digital integrated communication network, these two sets of communication channels are two independent communication channels.
Since the setting is made by a set of calls, consideration must be given to prevent calls from being set which are inconvenient for the composite communication.

[Conventional technology]

FIG. 3 is a diagram showing an example of a digital integrated communication network to which the present invention is applied, and FIG. 4 is a diagram showing an example of the conventional signal transmission and reception process in FIG.

In FIG. 3, subscriber lines 2 and 3 accommodated in the digital integrated communication network 1 can set up two sets of communication paths. Furthermore, the terminal device 4 connected to the subscriber line 2 and the terminal device 5 connected to the subscriber line 3 are terminal devices capable of combined voice and video communication, and the terminal device 6 is a terminal device capable of communicating only by voice. A device.

In FIGS. 3 and 4, in order for the terminal device 4 to perform composite communication using audio and video with the terminal device 5, the audio SETUP (V) signal is first sent to set up an audio communication path. Next, a video SETUP (I) signal is sent to the digital integrated communication network 1 in order to set up a video communication path. The digital integrated communication network 1 sends the audio SETUP (V) signal to the terminal devices 5 and 6 via the subscriber line 3, and then sends the video signal to the terminal devices 5 and 6.
Transmits the SETUP(I) signal. Since the terminal device 6 is unable to perform composite communication using audio and video, it returns a RELEASE COMPLETE signal indicating non-compliance, terminates the call, and only the terminal device 5 performs audio SETUP.
(V) signal and video SETUP (I) signal,
Audio ALERT (V) signal and video ALERT
(I) Returns the signal and indicates the incoming call to the called party. The digital integrated communication network 1 transmits the audio ALERT (V) signal and the video ALERT (I) signal returned from the terminal device 5 to the terminal device 4 . The called party answers and connects the audio CONNECT from the terminal device 5.
(V) When the signal and video CONNECT (I) signal are returned to the digital integrated communication network 1, the digital integrated communication network 1 receives the audio signal returned from the terminal device 5.
CONNECT (V) CONNECT for signal and video
(I) Transmits the signal to the terminal device 4 and also sends the audio CONNECT ACKNOWLEDGE to the terminal device 5.
(V) CONNECT for signal and video
Returns the ACKNOWLEDGE(I) signal. As described above, an audio communication path and a video communication path are set between the terminal devices 4 and 5. The terminal device 4 is connected to the CONNECT (V) signal for audio and for video.
When either CONNECT(I) signal is received,
The fact that the called terminal device 5 has responded is displayed to the calling party. In response to the response display, the calling party starts a composite communication using audio and video from the terminal device 4 to the terminal device 5.

[Problem that the invention seeks to solve]

As is clear from the above explanation, in the conventional response display method, the terminal device 4 that made the call to perform composite communication using audio and video is
CONNECT (V) signal or video CONNECT
(I) When either one of the signals is returned, a response is immediately displayed to the calling party and a composite communication using audio and video is started.

However, in the digital integrated communication network 1, calls using the audio SETUP (V) signal and the video SETUP (I) signal are processed independently of each other, so for example, the video communication path is more difficult to use than the audio communication path. Even if the setting is delayed, the terminal device 4 will be connected to the audio CONNECT
(V) Since the called party's response is displayed immediately upon receiving the signal, there is a problem in that composite communication is started before the video communication channel has been set up, and communication without video is performed. .

[Means for solving problems]

The present invention solves the above problems by taking the following measures.

That is, in the present invention, when a terminal device connected to a subscriber line issues multiple calls in order to collectively use multiple communication channels, all response signals for the multiple calls are received from the digital integrated communication network. After that,
Display the called party response to the calling party.

[Effect]

That is, according to the present invention, a terminal device that has made multiple calls to perform composite communication does not issue a response from the called terminal device for the first time when response signals for the multiple calls are returned from the digital integrated communication network. In order to display this information to the calling party, communication is prevented from starting when only one set of communication channels has been set.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a response display method according to an embodiment of the present invention, and FIG. 2 is a diagram showing an example of the signal transmission and reception process in FIG. 1. The target digital integrated communication network is shown in Figure 3.

In FIGS. 1 and 2, in order for the terminal device 4 to perform composite communication using audio and video with the terminal device 5, the audio SETUP (V) signal is first sent to set up an audio communication path. Next, in order to set up a video communication channel, a video SETUP (I) signal is sent to the digital integrated communication network 1, and it is confirmed that the call uses two sets of communication channels at once (see Figure 1). Steps S1 and S2), the CONNECT returned from the digital integrated communication network 1 when the called party responds.
The signal number counting function is activated (step S3).
The digital integrated communication network 1 transmits an audio SETUP (V) signal and subsequently a video SETUP (I) signal to the terminal devices 5 and 6 via the subscriber line 3.
RELEASE indicating non-conformity as terminal device 6 is not capable of composite communication using audio and video.
The call is terminated by returning the COMPLETE signal, and only the terminal device 5 sends the audio ALERT (V) signal and video ALERT (I) signal in response to the audio SETUP (V) signal and video SETUP (I) signal. The call is returned and the call is displayed to the called party. The digital integrated communication network 1 is for audio returned from the terminal device 5.
The ALERT (V) signal and the video ALERT (I) signal are transmitted to the terminal device 4. When the called party answers and the terminal device 5 returns the audio CONNECT (V) signal and the video CONNECT (I) signal to the digital integrated communication network 1, the digital integrated communication network 1 receives the audio signal returned from the terminal device 5. CONNECT (V) signal for video and CONNECT (I) signal for video from terminal device 4.
At the same time, it is transmitted to the terminal device 5 for audio.
Returns the CONNECT ACKNOWLEDGE (V) signal and the CONNECT ACKNOWLEDGE (I) signal for video. As described above, an audio communication path and a video communication path are set between the terminal devices 4 and 5. The terminal device 4 receives two sets of data within a predetermined period of time.
CONNECT indicates that the CONNECT signal was returned.
When counted by the signal counting function (steps S4 and S5), it is displayed that the called party has answered (step S6). In response to the response display, the calling party starts a composite communication using audio and video from the terminal device 4 to the terminal device 5.

In the digital integrated communication network 1, for example, if the setting of a video communication channel is delayed and two sets of CONNECT signals cannot be received by the terminal device 4 within a predetermined period of time, the setting of a composite communication call is delayed. Determine that it is impossible and disconnect the call (Step S)
7).

As is clear from the above description, according to this embodiment, when the calling terminal device 4 makes a call that uses two sets of communication channels at once, it receives two sets of CONNECT signals from the digital integrated communication network 1. Since the response is displayed to the caller only after the communication is completed, the caller is prevented from starting composite communication with only one communication channel set.

Note that FIGS. 1 to 3 are only one embodiment of the present invention, and the target digital integrated communication network is not limited to that shown in the figures, and many other modifications may be considered. However, the effects of the present invention remain the same in either case. Further, the number of communication channels to be used at once is not limited to two sets, and many variations of three or more sets may be considered, but the effects of the present invention do not change in any case.

〔Effect of the invention〕

As described above, according to the present invention, in the digital integrated communication network, a terminal device that has issued two sets of calls in order to collectively use two sets of communication channels receives response signals for the two sets of calls from the digital integrated communication network. Since the response of the called terminal device is displayed to the caller for the first time when the call is returned, communication is prevented from starting when only one set of communication channels has been set.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a response display method according to an embodiment of the present invention, FIG. 2 is a diagram showing an example of the signal transmission and reception process in FIG. 1, and FIG. 3 is a diagram showing an example of the signal transmission and reception process in FIG. FIG. 4 is a diagram showing an example of the conventional signal transmission/reception process in FIG. 3. In the figure, 1 is a digital integrated communication network, 2 and 3 are subscriber lines, 4, 5 and 6 are terminal devices,
S1 to S7 indicate steps.

Claims (1)

[Claims] 1. In a digital integrated communication network in which a plurality of communication channels can be set up on a subscriber line, a terminal device connected to the subscriber line issues multiple calls in order to collectively use the plurality of communication channels, and the digital integration A response display method characterized by displaying a called party response after receiving all response signals for the plurality of calls from a communication network.