JPH04263552A - Interrupting/forced disconnecting system - Google Patents

Abstract

PURPOSE:To enable tripartite speaking among a first terminal equipment, second terminal equipment and interrupting terminal equipment and to construct the system at low cost by forcedly disconnecting speaking between the first and second terminal equipments when forced disconnection is designated from the interrupting terminal equipment. CONSTITUTION:A first terminal equipment 9a connected to an exchange 25 turns another exchange 28 to be occupied with a second terminal equipment 9b by using a prescribed shared line 30a1. In this case, a memory 36 stores call information corresponding the terminal equipment 9a and a trunk number a1 of the used line 30a1. When interruption is designated from a terminal 31 to the line 30a1, the memory 36 is referred to and when speaking is executed by using the line 30a1, tripartite speaking is enabled among the terminal equipments 9a, 9b and 31. When the forced disconnection is designated from the terminal equipment 31, speaking between the terminal equipments 9a and 9b is forcedly disconnected. When all the shared lines are occupied in the case of raising an emergency alarm to an emergency alarm receiver 42, the line 30a1 is interrupted, for example, among these lines and the emergency alarm can be raised to the device 42.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interrupt and forced disconnection system. In detail, in a private branch exchange system where one line serves as both an emergency call network and a general telephone network, an extension that is in use on the general telephone network is interrupted from the control console on one side of the exchange, and the This relates to a method of forcibly disconnecting a line and using that line to make an emergency call on the other side of the exchange.

0002

2. Description of the Related Art FIG. 4 shows a block diagram of an example of the prior art. In the figure, a private branch exchange 1 has trunks 21 and 22.
,...general call line group 31, 32,...trunk 41
, 42, . 9a and 9b are extension telephones owned by subscribers A and B, respectively. Reference numeral 10 denotes a command console owned by subscriber C, which is connected to exchange 1; and 11, an emergency call receiving device connected to exchange 5. In this system, the general call line groups 31, 32, . . . and the emergency call line 7 are separate lines. Here, subscriber A
, B make a call, exchange processing is performed in the exchanges 1 and 5, and one line of the general call line group 31 is used to make the call. On the other hand, when subscriber C makes an emergency call to the emergency call reception device 11, when the command is issued from the command board 10, switching processing is performed in the exchanges 1 and 5, and one line of the emergency call line group 7 is connected. is used to make an emergency call.

FIG. 5 shows a block diagram of another conventional example. In the figure, the private branch exchange 15 includes special trunks 161, 162 for emergency/general switching, emergency call/general call line groups 171, 172, trunk 181.
, 182, . . . are connected to the private branch exchange 19. Reference numeral 20 is a command console, and 21 is a mixing trunk, which is connected to the exchange 15. This system has both general call lines and emergency call lines (combined line group 171, 17
2,...).

[0004] Now, when subscriber A and subscriber B make a general call, switching processing is carried out in the exchanges 15 and 19, and the special trunk 161 is connected to terminal ■, and the line group 171 for subscriber A and B is connected. One of the lines 17
1 Make a call using a.

[0005] Here, subscriber C uses the emergency call receiving device 11.
When making an emergency call, this system does not have a dedicated line for emergency calls, so for example, assume that an emergency interrupt is made to the dual-purpose line 171a, which is currently being used by subscribers A and B. In this case, it is assumed that all other shared lines are in use. The mixing trunk 21 is activated by an interrupt command from the command console, allowing subscribers A, B, and C to make a three-way call. Through this three-way call, subscribers A and B
When it is determined that the shared line currently in use may be disconnected, subscriber C issues a forced disconnection command from the command console 20. The special trunk 161 is connected to the terminal ■ side by the exchange processing in the exchanges 15 and 19, and the dual-purpose line 171
A is used to send an emergency report to the emergency report reception device 11.

[0006]

[Problems to be Solved by the Invention] The conventional example shown in FIG.
Dedicated lines are required for general calls (line groups 31, 32,...) and emergency calls (line group 7), and emergency call line group 7, which is used only for emergency calls, must be prepared at all times. Therefore, there is a lot of waste in terms of operational costs,
There was a problem that increased costs. Furthermore, the conventional example shown in FIG. 5 requires special trunks 161 1 , 162 , . . . (hardware configuration) for each shared line 171 , 172 , .

SUMMARY OF THE INVENTION An object of the present invention is to provide an interrupt and forced disconnection system that can be constructed at low cost using general trunks without using special trunks.

[0008]

[Means for Solving the Problems] FIG. 1 shows a diagram illustrating the principle of the present invention. In the figure, 30a1 is a dual-purpose line, which is used in a switching system that serves as both an emergency call network and a general telephone network. 32 is a control device connected to the exchange 25, and a memory in which the terminal 9a connected to the exchange 25 and the trunk number of the shared line in use by the terminal are stored as call information. 36, and a control means 34 which performs an interrupt and forced disconnection in response to an interrupt and forced disconnection command from an interrupt terminal 31 connected to the exchange 25.

In the present invention, when the first terminal 9a connected to the exchange 25 is busy with the second terminal 9b connected to another exchange 28 using the predetermined dual-purpose line 30a1, Call information associating the first terminal 9a and the trunk number a1 of the dual-use line 30a1 is stored in the memory 36, and the call information is stored in the memory 36, and the call information is stored in the memory 36, and the call information that associates the first terminal 9a with the trunk number a1 of the dual-use line 30a1 is transmitted from the interrupt terminal 31 to the dual-use line 30.
When an interrupt is specified for a1, the memory 36 is referred to,
When a call is being made using the dual-use line 30a1, the first terminal 9a, the second terminal 9b, and the interrupt terminal 31 enable a three-way call, and a forced disconnection is performed from the interrupt terminal 31. is specified, the first terminal 9a and the second
The call with the terminal 9b is disconnected.

0010

[Operation] When the first terminal 9a makes a call to the second terminal 9b using the dual-purpose line 30a1, the trunk number a1 of the first terminal 9a and the dual-purpose line 30a1 is stored in the memory 36.
are stored in correspondence. Here, when the interrupt terminal 31 attempts to make an emergency report to the emergency report reception device 42 connected to the exchange 28 of the second terminal 9b, if all the shared lines are currently busy, For example, an interrupt is applied to the shared line 30a1.

[0011] In response to this interrupt command, the control means 34 enables the three-way call, where subscriber C of the interrupt terminal 31 communicates with subscriber A of the first terminal 9a and subscriber A of the second terminal 9b.
With the consent of subscriber B, both parties are informed that the forced disconnection will be performed. Due to the forced disconnection designation of the interrupt terminal 31, the calls between the first terminal 9a and the second terminal 9b are disconnected, and the interrupt terminal 31 sends an emergency call to the emergency call receiving device 42 using the shared line 30a1. can be done.

In this case, since the interruption and forced disconnection are performed by software control in the control device 32 without using a special trunk as in the conventional example, it can be constructed at a lower cost than in the conventional example. In addition, since a dual-purpose line is used, there is no need to always have an emergency call line that is not used very often, unlike in the conventional case where dedicated lines are provided for emergency calls and general calls. Can be configured.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 2 shows a block diagram of one embodiment of the present invention. In the figure, 25 is a private branch exchange, trunks 26a, 27
a to the private branch exchange 28, trunks 26b, 27b
are respectively connected to a private branch exchange 29 via. 30a
, 30b, . . . are emergency call/general call line groups, between trunks 26a and 27a, between trunks 26b and 27b, .
It is set in. Note that the trunks 26a, 26b,...
, 27a, 27b, . . . are general trunks. The private branch exchange 25 has subscriber A's extension telephone (first terminal) 9a.
, a command console 31 (interrupt terminal) of subscriber C, and a mixing trunk 39 are connected. The private branch exchange 28 is connected to subscriber B's extension telephone (second terminal) and emergency call receiving device 42 .

A control device 32 is connected to the effect device 25 via a bus 33. Each part of the control device 32 shown in the figure is shown as a hardware configuration instead of software for convenience. A central control unit (CPU) 34 controls the entire control device 32. Control devices similar to the control device 32 are also provided in the exchanges 28, 29,...
Since the operation of exchange 25 will be the focus here, exchange 2
Only the control device 32 on the 5th side is shown.

Next, the operation of the present invention will be explained together with the operation sequence shown in FIG. Subscriber A is trunk 2
When making a general call with subscriber B using one dedicated line 30a1 (trunk number a1) of the dual-purpose circuit group 30a belonging to group 6a, exchange processing is performed at exchanges 25 and 28. That is, the call connection information from the extension telephone 9a enters the exchange 25, is exchanged, and is transferred to the trunk 26a.
, the dual-purpose line 30a1, and the trunk 27a to the exchange 28, where they are exchanged and connected to subscriber B. At this time, the call connection information from the extension telephone 9a is transmitted to trunk 2.
6a, the previous exchange process is performed (step 50 in FIG. 3), and the controller 32 enters the central control section 34 (step 51), and the supervisory control section 35 stores the subscriber's information in the interrupt destination call information memory 36. A's extension telephone 9a belongs to the trunk 26a (trunk number a1).
) is used to store information indicating that the call is in progress (step 52).

Here, as in the conventional example shown in FIG. Trunk number a1 corresponding to
An interrupt is specified for (step 53 in FIG. 3). The relay data memory 37 in the control device 32 contains designated numbers (0.1, . . . ) and trunk numbers (a1, a2,...) for dual-purpose lines that are targeted for interruption and forced disconnection by subscribers.
) are registered in advance in association with each other. Command desk 3
1 operates the central control unit 34 according to the interrupt specification for the trunk number a1, and the interrupt and forced disconnection control unit 38
confirms the specified number and registered contents in the memory 37 (Fig. 3
Step 54), it is checked whether the dual-use line 30a1 of the designated trunk number a1 is in a monitorable state (a state in which three-way communication is possible among subscribers A, B, and C) (step 55).
).

For example, when one of subscribers A and B is dialing, monitoring is not possible, but when subscribers A and B are talking, it is possible to monitor. Therefore, check the interrupt and forced disconnection control unit 38 (step 5).
5), the supervisory control unit 35 looks at the interrupt destination call information in the memory 36 (step 56 in FIG. 3) and determines that monitoring is possible (step 57).

Based on the determination that monitoring is possible (step 57), the central control unit 34 informs the command console 31 that the extension telephone 9a is connected to trunk number a1 for the trunk number a1 designated for interrupt.
It is notified that a call is in progress using the dual-purpose line 30a1 (step 58). At the same time, the mixing trunk 39 (this is a general type that is also provided in the conventional example) is controlled to connect the command console 31 to the dual-purpose line 30a1 of trunk number a1, so that subscribers A, B, and C can A three-way call is made possible (step 59 in FIG. 3).

[0019] Subscriber C, who needs an emergency call, urges subscribers A and B to end the call, and if both parties agree, informs both parties that the call will be forcibly disconnected. When subscriber C specifies forced disconnection using the command desk 31 (step 60 in FIG. 3), the central control unit 34 forcibly disconnects the extension telephone 9a and the shared line 30a1 (step 61). Trunk 26a
, the extension telephone 9a, and the command desk 31, respectively (steps 62, 63, and 64). Therefore, an emergency report is sent from the command desk 31 to the emergency report receiving device 42 via the trunk 26a and the shared line 30a1 with trunk number a1.

In this case, interrupts and forced disconnections are handled by a special trunk (hardware configuration) like the conventional example shown in FIG.
Since control is performed by software in the control device 32 without using a common line (provided for each shared line group), it can be constructed at a lower cost than the conventional example shown in FIG. In addition, since a line for emergency calls/general calls is used, there is no need to always prepare a special line for emergency calls as in the conventional example shown in Figure 4, and there is no increase in costs. .

[0021] If you want to change the registration of the trunk number of the dual-purpose line that is subject to interruption or forced disconnection,
A rewrite instruction is given on the maintenance console 40 of No. 5. The trunk number change unit 41 changes the trunk number registration in the memory 37, for example, adds a new trunk number b1, or adds, for example, trunk numbers d1 and d2 instead of trunk numbers a1 and a2.

[0022]

Effects of the Invention According to the present invention, the disconnection is performed by software control in a special trunk control device as in the conventional example, without using interrupts or forced disconnection.
It can be constructed at a lower cost than the conventional example, and since a dual-purpose line is used, it can be constructed at a lower cost than the conventional example in which a dedicated line for emergency notification is provided.

[Brief explanation of the drawing]

FIG. 1 is a diagram explaining the principle of the present invention.

FIG. 2 is a block diagram of one embodiment of the invention.

FIG. 3 is an operation sequence in the present invention.

FIG. 4 is a block diagram of a conventional example.

FIG. 5 is a block diagram of another conventional example.

[Explanation of symbols]

9a, 9b Extension telephone (terminal) 25, 28 Private branch exchange 26a, 27a Trunk 30a Emergency call/general call line group 30a1
Emergency call/general call line 31 Command board (interrupt terminal) 32 Control device 34 Central control unit (CPU) (control means) 35 Supervisory control unit 36 Interrupt destination call information memory 37 Trunk line data memory 38 Interrupt, forced disconnection control Part 39 Mixing Trunk

Claims (1)

[Claims] Claim 1: In a switching system in which a dual-purpose line (30a1) serves as both an emergency call network and a general telephone network, the switching system (25 ), a memory in which the terminal (9a) connected to the exchange (25) and the trunk number of the shared line being used by the terminal are stored as call information in correspondence with each other. (36), and a control means (34) for performing an interrupt and forced disconnection in response to an interrupt and forced disconnection designation from an interrupt terminal (31) connected to the exchange (25), and the control means (34)
Accordingly, the first terminal (9a) connected to the exchange (25) is connected to the second terminal (9) connected to the other exchange (28) using the predetermined dual-purpose line (30a1).
b), the call information in which the first terminal (9a) is associated with the trunk number (a1) of the dual-purpose circuit (30a1) is stored in the memory (36), and the call information is stored in the memory (36). from the included terminal (31) to the dual-use line (30a1)
), the memory (36) is referred to, and if a call is being made using the dual-use line (30a1), the first terminal (9a) and the second terminal The first terminal (9b) and the third terminal (31) enable a three-way call, and when forced disconnection is specified from the interrupt terminal (31), the first terminal (9a) and the third An interruption and forced disconnection method characterized by disconnecting the call with the terminal (9b) of No.2.