JPS6328389B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an interrupt multiple access system. The present invention relates to a method for interrupt multiple connection of a third party by controlling through an intermediary data signal transfer device.

[Conventional technology]

Conventionally, in telephone switching networks, when a subscriber wants to have a conversation with a third party while on a call with another person, or when he/she wants to receive a message service, a call memo service, etc. during a call, the subscriber requests a Interrupt multiple connection is occurring.

FIG. 3 is an explanatory diagram of the operation of the conventional multiple access system using third party calling.

If subscriber 1 wants to have a meeting with a third party during a call via subscriber circuit switching device 2 and train 3, subscriber 1's telephone can be hooked up to a subscriber accommodating terminal station (hereinafter referred to as LS). )
request multiple connections. The signal sent out by hooking is identified as a multiple connection in the subscriber circuit switching device 2, the link is separated at the point X, and the subscriber 1 is connected to the multiple connection device 4 via the signal line 32. By this connection, the train 3 is automatically connected to the pseudo subscriber circuit 5 of the multiplex connection device 4 via the signal line 33, and is temporarily disconnected from the subscriber 1 and put on hold. At the same time, the register of LS station 6
A dial tone is sent from the trunk to subscriber 1 via signal lines 34 and 32. When subscriber 1 dials the telephone number of a third party, the dial signal sent from the telephone is transferred to the register trunk of LS station 6 via signal lines 32 and 34, where the other party is identified. After that, the trunk 24 of the train 7 is captured by the common control device of the exchange and connected to a third party via the train 7. As a result, after the subscriber 1 and the subscriber of the train 7 talk, when the subscriber 1 hooks again, the multiple access device 4 identifies the hooking signal and operates the relay 8, thereby transmitting the hooking signal to the train 3. and train 7 are connected, and 3
It is now possible to make phone calls.

[Problem that the invention seeks to solve]

However, in FIG. 1, there is a problem in that the first call is temporarily interrupted and the subscriber on train 3 has to wait for a while. Such problems can be solved if there is a signaling function between the subscriber and the exchange that allows third party calls to be made without interfering with the call.
It can be solved. Methods to deal with this include providing multiple subscriber lines for subscribers,
A commonly considered method is to separate the subscriber line into bands for calls and signals, and to send and receive signals during communication using these signal bands.

FIGS. 4, 5, and 6 are explanatory diagrams of the conventional improved multiple access system, in which signals outside the voice band at frequencies higher than the voice band (0.3 to 3.4 KHz) are added to the subscriber line signaling system. This shows a case where the above problem is solved by providing a transmitting and receiving function.

FIG. 4 is a relay system diagram, FIG. 5 is a configuration diagram of subscriber 1's telephone equipped with a function for transmitting and receiving out-of-voice band signals, and FIG. 6 is a signal sequence diagram between subscriber 1 and LS station 6. .

Subscriber 1 in FIG. 4 passes through low-pass filter 14, subscriber circuit switching device 2, LS station 6,
When making a third party call during communication via the subscriber 1, as shown in FIG. Enter the number from dial 107. The terminal control unit 105 that detects the button input and dial input, via the out-of-band modem 104,
According to FIG. 6, transmission of an upstream carrier (an alternating current carrier wave signal, for example, a 10 KHz signal) is started. The carrier is blocked by the low-pass filter 14, but is branched downward and detected by the out-of-band signal detection circuit 15. Here, the detected signal is traffic light 1
The control device 12 is notified via 7. The control device 12 closes the link 16 via the control line 19, connects the subscriber switching device 2 and the multiple connection device 9, and connects the subscriber line and the out-of-band modem 10.
A down carrier (alternating current carrier wave signal, for example, a 20 KHz signal) is transmitted from the out-of-band modem 10 (see FIG. 6). When the terminal control unit 105 of the subscriber 1 shown in FIG. 5 detects the downlink carrier, it modulates the uplink carrier and sends out a third party paging signal having a frame structure as shown in FIG. 6. Thereby, the third party paging signal is guided from the subscriber line via the link to the out-of-band modem 10, demodulated here, and then sent to the control device 12. It is sent to the control device 12. The control device 12 accesses the exchange of the LS station 6 using the dialed number sending device 11 based on the telephone number of the third party in the third party calling signal. That is, by transmitting an off-hook state signal, the dial tone from the register trunk is identified by the connection control identification device 13, and then the dialed digits are transmitted from the transmitting device 11 to the exchange. When the LS station 6 receives the dialed digits through the register trunk, the LS station 6 acquires an empty trunk 24 using the common control device and connects to a third party via the train 7. When the control device 12 finishes sending the dialed digits, it notifies the subscriber 1 of a third party connection completion signal via the out-of-band modem 10 as shown in FIG.
relay 18 is activated, subscriber 1 and train 3
and train 7 are multiple connected. Subscriber 1 is the third
After confirming that the multiple connection has been completed by displaying the function lamp 108 (third party connection lamp) shown in FIG. 5, a call including the third party is started.

In this way, the problem shown in Figure 3 could be solved by using a signal outside the voice band, but in the configuration shown in Figure 4, the dialed number sending device is required to send out dialed numbers, etc. 11 and connection control identification device 13 in many LS stations,
There is a problem in that it increases costs.

The purpose of the present invention is to improve these conventional problems,
To provide an interrupt multiple connection system capable of economically connecting a third party without interfering with or interrupting the call when the third party is called during a call.

[Means to achieve the problem]

In order to achieve the above object, the interrupt multiple access system of the present invention includes a subscriber terminal 1 equipped with a voice band signal transmitting/receiving device, a subscriber switching device having a plurality of connection terminals for connecting to an exchange, and In a telephone switching network that includes a terminal station that is connected to a subscriber switching device and is equipped with a multiple connection device that makes multiple connections between a plurality of connection terminals, and a control station that centrally controls the plurality of terminal stations, the control station , means 26 for requesting an interrupt connection to the multiple access device via the incoming line;
and interrupt connection completion detection means 2 for detecting the completion of interrupt connection from the multiple connection device via the incoming line.
7, the multiple connection device also includes an interrupt connection completion return means 35 for returning an interrupt connection completion signal via the incoming line when receiving an interrupt connection request from the control station, and also an interrupt connection completion return means 35 for sending back an interrupt connection completion signal via the incoming line. each has a data signal transfer means 22, and when the terminal station receives a request to call a third party by a voice band out-of-band signal from the subscriber terminal 1 which is in communication, the terminal station calls the third party by means of the voice band out-of-band signal. When a call is maintained with the other subscriber terminal, and an interrupt connection request to a third party is received from the subscriber terminal 1 in communication using an out-of-voice band signal, the interrupt connection request is sent to the data signal transfer means. After transmitting the interrupt connection request signal from the interrupt connection request means 26 to the terminal station accommodating the subscriber switching device of the subscriber terminal 1, the control station transmits the interrupt connection request signal via the transmission line. When the terminal station receives the interrupt connection request signal at the multiple connection device, the interrupt connection completion return means 35 of the multiple connection device transmits the interrupt connection completion signal to the control device in response to the interrupt connection request signal. At the same time, the multiple connection device multiplexes the communication line of the subscriber terminal 1 and the incoming line from the control station, and the control station detects the interrupt connection completion by the interrupt connection completion detection means 27. When you check,
After calling the third party through the relay connection, the data signal transfer means 22 transmits confirmation of the completion of the interrupt connection to the terminal station, and the terminal station sends confirmation of the completion of the interrupt connection to the subscriber terminal 1. It is characterized by relay transmission and multiple connection to a third party using the multiple connection device.

[Effect]

In the present invention, in a telephone switching network including terminal stations accommodating subscribers having a function of transmitting and receiving out-of-voice band signals, and a control station centrally controlling a plurality of terminal stations, the terminal stations include a control station. Means for returning connection completion when activated by the station (interrupt response circuit 3)
5), and the control station includes means for controlling connections (connection control device 26, connection determination device 27).
Furthermore, a data signal transfer means 22 is provided between the two stations.
Install T and 22L, respectively. When receiving a third party call request signal containing the telephone number of the third party from a subscriber who is currently talking, the data transfer means transfers this to the control station, and the connection control means 26 of the control station sends the signal to the subscriber. After making a silent call to the terminal station and sending an interrupt connection completion signal back to the control station from the interrupt response circuit 35 of the terminal station, multiple connections are made, and the control station calls the third party based on the incoming call completion judgment of the connection judgment device 27. Connecting. The third party connection refers to the third party's telephone number included in the third party call relay signal, makes an incoming call to the third party through a normal relay connection, and when the relay connection is completed, the data is A third party connection completion signal is sent from the transfer means 22 to the subscriber via the out-of-band modem 10 of the terminal station. In this way, a subscriber can call a third party and make multiple connections without interrupting the call with the subscriber who is currently talking. Further, there is no need to install a large number of special devices at the terminal station, and it becomes possible to economically and efficiently provide a three-party call service, a message service, a call memo service, etc. In addition, in the case of a three-party call service, the control station calls a third party and makes multiple connections to the train in use, but in the case of a message service or call memo service, the control station accesses a central storage device, etc. This central storage device will be connected multiple times to the train in use. Therefore, a third party or centralized storage device for multiple connection can call and respond not only to things housed in the control station but also to things housed in other stations through normal relay connections. This results in multiple connections being made to the train in use.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a system diagram of a multiple access system showing one embodiment of the present invention, and FIG. 2 is a signal sequence chart in FIG. The signal sequence is shown below. The telephone used by the subscriber here is
This is the same as in Figure 5.

In the present invention, multiple connection services are possible using interrupt connections, so in addition to the three-party call service shown in the conventional method, for example, a voice storage device installed in the telephone network is called up during communication to record the contents of the call. Although new services such as a call memo service such as recording are also possible, a three-party call service will be described in detail in this embodiment.

In FIG. 1, a subscriber 1 is in a communication state via a train 3 via a subscriber line, a low-pass filter 14, a subscriber circuit switching device 2, an exchange at an LS station 6, and a trunk 24. In FIG.

In this state, when the subscriber 1 calls a third party, the procedure and method are similar to those described in FIG. That is, the subscriber 1 first presses the function button (third party call button) 106 of the telephone shown in FIG. Terminal control unit 105 that detected button input and dial input
starts transmitting an upstream carrier (an alternating current carrier signal) via the out-of-band modem 104 according to FIG. The carrier is blocked by the low-pass filter 14, but branched downward to the out-of-band signal detection circuit 1.
Detected by 5. The signal detected here is
The control device 12 is notified via the signal line 17. The control device 12 closes the link 8a via the control line 19, connects the subscriber switching device 2 and the multiple access device 21, and connects the subscriber line and the out-of-band modem 1.
0 is connected, and at the same time, the X point in the subscriber switching circuit 2 is automatically disconnected, and then the down carrier is transmitted from the out-of-band modem 10 (see FIG. 2). When the terminal control unit 105 of subscriber 1 detects the downlink carrier, it configures the configuration as shown in FIG.
A third party calling signal (format configuration consisting of a third party telephone number and an interrupt request) is sent by modulating the uplink carrier. Thereby, the third party calling signal is guided from the subscriber line via the link 8a to the out-of-band modem 10, demodulated there, and then sent to the control device 12.

When the control device 12 identifies the third party paging signal, it relays this signal to the common processing device 20 of the LS station 6. The common processing unit 20 adds the telephone number of the subscriber 1 and sends a third party output relay signal as shown in FIG. Send out.
This third party paging relay signal has a format consisting of the telephone number of subscriber 1, the telephone number of the third party, and an interrupt request.

When the central processing unit 28 of the central control station 25 receives the third party paging relay signal, the central processing unit 28 of the central control station 25
Calling subscriber 1 using a ringless call (a call performed by subscriber facsimile service, for example, Nippon Telegraph and Telephone Public Corporation Telecommunications Research Institute Research Application Report VOL.30 No.1 (January 1981) (Refer to reference documents such as "FICS-1 Exchange System"). That is,
Control device 26 connected to LS station 6 using train 7
Sends a selection signal. At the LS station 6, the selection signal is received from the central control station 25 via the trunk 24 by a receiver within the station, and by identifying that the signal is addressed to the subscriber switching device 2 of the subscriber 1,
Since it matches the stored content of the common processing device 20, it is confirmed that it is the interrupt connection request sent earlier. As a result, the LS station 6 connects the train 7 from the exchange to the second terminal of the subscriber switching device 2 (the first terminal is connected to the train 3).
(The path between the LS station 6 and the subscriber switching device 2 shown by the broken line in FIG. 1). Next, the interrupt connection request signal (for example, a 1300 Hz tone signal) is relayed to the multiple access device 21 via the subscriber switching device 2, and its reception is confirmed by the interrupt response circuit 35. The interrupt response circuit 35 is composed of a signal receiver that receives an interrupt connection request signal, a signal transmitter that transmits an interrupt connection completion signal, and a loop forming relay (all not shown). When it receives the interrupt connection request signal, it operates the loop forming relay and closes its contacts to form a loop to the control station 25 (response signal), thereby responding to the interrupt connection request signal. Activate the signal transmitter and send an interrupt connection completion signal (for example, a 2100Hz tone signal) for a certain period of time. Then, the contact 8 in the multiple connection device 21
By closing subscriber 1, train 3, and train 7 are multiple-connected to form a three-way call path. It should be noted that while the communication path is drawn into the multiple access device 21, the communication path of the train 3 in the subscriber switching device 2 continues to be disconnected with an x mark.

The response signal (loop DC signal) from the interrupt response circuit 35 and the interrupt connection completion signal (for example, a 2100Hz tone signal on the loop line) are sent to the subscriber switching device 2.
and is relayed to the central control station 25 via the train 7. When the central control station 25 receives the response signal through normal trunk monitoring and receives the interrupt connection completion signal through the connection determination circuit 27, the central control station 25 looks at the third party's telephone number included in the third party calling relay signal, and
Train 36, terminal station (LS)
The call is received by the subscriber 38 (third party) via the station 37, and the call is made. When the relay connection of the train 36 is completed, the central control station 25 sends out a third party connection completion relay signal via the data transfer devices 22T and 22L (as shown in FIG. phone number format). The central processing unit 20 that received the relay signal,
A third party connection completion signal as shown in FIG. 2 is sent to subscriber 1 via control device 12 and out-of-band modem 10.
(format configuration with only interrupt confirmation). Subscriber 1 confirms that the multiple connection has been completed by viewing the function lamp 108 (third party connection lamp) in the telephone as shown in FIG.
Start a call including a third party.

As described above, subscriber 1 can continue talking with the subscriber of train 3 without interruption from the third-party connection request to the reception of the third-party connection completion signal. Furthermore, even after this, audible signal tones such as a ring tone and a busy tone are inserted into the call, but the subscriber of train 3 is not separated from subscriber 1 and is not put on standby. In addition, when a call is received, if the call is connected to a busy tone, talkie, etc., or if the third party does not answer, the third party disconnection instruction signal and the out-of-band audio signal are controlled using the inter-office data transfer device. Of course, it is possible to transfer the information to the station 25 and disconnect the third party.

In this way, in the system shown in FIG. 1, a third party call request signal is transmitted to the central control station 25 via the inter-office data signal transfer device, and from the central control station 25, it is sent to the LS station 6 via the train 7. When the call arrives, the multiple connection device 21 performs interrupt multiple connection, and the multiple connection device 21 returns an interrupt connection completion signal to the central control station 25 via the train 7, so that the central control station 25 accepts the incoming call to a third party. At the same time as the connection is made, the completion of the third party connection is notified to the subscriber 1 via the interoffice data signal transfer device. Note that this inter-office data signal transfer device uses conventionally installed signal lines and transmitting/receiving devices for communication between central processing units of different stations.
Since it is also used for interrupt multiplexing, there is no need to newly install it, so there is no need to increase costs when implementing the present invention. Therefore,
As shown in FIG. 4, there is no need to provide a large number of dialing number sending devices or connection control identification devices 13, and as shown in FIG. It is possible to make a connection.

〔Effect of the invention〕

As explained above, according to the present invention, the central control station performs interrupt multiple connection, so that when a third party call is requested, the three party call can be made efficiently and economically without interfering with or interrupting the call. This enables multiple connection services such as services.

[Brief explanation of the drawing]

FIG. 1 is a system diagram of a multiple access system showing an embodiment of the present invention, and FIG. 2 shows the subscriber and LS in FIG.
A signal sequence chart between the station and the central control station, Figure 3 is an explanatory diagram of the conventional multiple access system using third party calling, Figure 4 is an explanatory diagram of the conventional improved multiple access system, and Figure 5 is FIG. 6 is a detailed diagram of the interior of the telephone according to the invention and the prior art, and is a signal sequence chart between the subscriber and the LS station in FIG. 5. 1: subscriber, 2: subscriber circuit switching device, 3,
7, 36: Train, 4, 9, 21: Multiple connection device, 5: Pseudo subscriber circuit, 6: Terminal station (LS station),
8, 18: Relay, 10: Out-of-band modem, 11:
Dial number sending device, 12: Control device, 13:
Connection identification device, 14: Low-pass (pass) filter, 1
5: out-of-band signal detection circuit, 16: link, 17,
19, 32, 33, 34: Signal line, 20: Common processing device, 22L: Data signal transfer device on terminal side,
22T: Data signal transfer device on the central control station side, 2
4: trunk, 25: central control station using electronic exchange, 26: connection control device, 27: connection determination device,
28: Central processing unit, 35: Interrupt response circuit, 3
7: Terminal station (LS station), 38: Third party subscriber, 10
0: Low-pass filter, 101: Hybrid circuit,
102: Transmitter, 103: Receiver, 104: Out-of-band modem, 105: Terminal control unit, 106: Function button for inputting a third party call request, 107: Dial circuit, 108: Displaying completion of third party connection lamp.

Claims (1)

[Claims] 1 A subscriber terminal 1 equipped with a voice band signal transmitting/receiving device, a subscriber switching device having a plurality of connection terminals for connecting to an exchange, and a subscriber switching device connected to the subscriber switching device and multiplexing between the plurality of connection terminals. In a telephone switching network that includes a terminal station equipped with a multiple access device to be connected, and a control station that centrally controls a plurality of the terminal stations,
The control station includes means 26 for requesting an interrupt connection from the multiple connection device via the incoming line, and interrupt connection completion detection means 27 for detecting the completion of the interrupt connection from the multiple connection device via the incoming line. Further, when the multiple connection device receives an interrupt connection request from the control station, the interrupt connection completion return means 35 returns an interrupt connection completion signal via the incoming line.
Furthermore, data signal transfer means 22 is provided between the terminal station and the control station, and the terminal station receives a request to call a third party from the subscriber terminal 1 in communication using an out-of-voice band signal. When received, the multiple connection device maintains the call with the subscriber terminal in communication, and then when an interrupt connection request to a third party is received from the subscriber terminal 1 in communication by an audio out-of-band signal,
The interrupt connection request is transferred to the control station via the data signal transfer means, and the control station transmits the request from the interrupt connection request means 26 to the terminal station accommodating the subscriber switching device of the subscriber terminal 1. After that, when an interrupt connection request signal is sent via the originating line, the terminal station receives the interrupt connection request signal in the multiple connection device, and the interrupt connection completion return means 35 of the multiple connection device sends the interrupt connection request signal. In response to the request signal, the interrupt connection completion signal is returned to the control station, and the multiple connection device multiplexes the line in communication with the subscriber terminal 1 and the incoming line from the control station, and the control station Interrupt connection completion detection means 27
When the completion of the interrupt connection is confirmed by , after calling a third party by relay connection, the confirmation of the completion of the interrupt connection is transmitted to the terminal station by the data signal transfer means 22, and the terminal station calls the subscriber terminal 1. An interrupt multiple connection system characterized in that a confirmation of completion of the interrupt connection is relayed to a third party, and the multiple connection device connects a third party multiplexedly.