JPH02288457A - Channel switching control system - Google Patents

Abstract

PURPOSE:To attain communication with use of a talking terminal equipment by switching and connecting a channel with the talking terminal equipment equivalent to a talking terminal equipment of a talking terminal master station by employing a switching circuit for talking between a relay station and an optional slave station in its subsystem. CONSTITUTION:A talking terminal equipment 10 of a relay station 3 is so configurated that it is called from a master station 1 similarly in the case of a talking terminal equipment 8 of each slave station 4 to attain the talking between the master station 1 and the relay station 3. When a changeover circuit 12 selects and connects a talking terminal equipment 11 to a talking line 14, since the talking terminal equipment 11 has a similar function to that of a talking terminal equipment 6 of the master station 1, it is possible to call each slave station 4 by using the talking terminal equipment 11. Thus, even when the existing subsystem is incorporated to adopt 2-layer configuration, the talking between the relay station 3 and the optional slave station 4 is attained by having only to add the talking terminal equipment 11 and the changeover circuit 12 to the relay station 3. Thus, the communication between the relay station and the optional slave station is attained.

Description

[Detailed Description of the Invention] [Summary] Concerning a call switching control method in a two-tier communication system such as a building management system, an economical configuration enables calls between a relay station and any slave station. For the purpose of In the two-tiered communication system in which a call is made between the call terminal device of the master station and the call terminal device of the slave station according to a selection signal between the terminal device and the data terminal device of the slave station, the The relay station includes a data terminal device, a call terminal device equivalent to the call terminal device of the slave station, a call terminal device equivalent to the call terminal device of the master station,
a switching circuit, a call path between the call terminal device of the master station and the call terminal device of each slave station via the relay station;
The communication route between the telephone terminal device of the relay station and the telephone terminal device of each slave station is switched by the switching circuit.

[Industrial application field]

The present invention relates to a call switching control method in a two-tier communication system such as a building management system.

A building management system collects detection signals from various sensors at a master station, and sends control signals from the master station to control various controlled devices such as air conditioners and electric lights. maintenance 2 between the slave station connected to the master station and the master station.
It is configured to allow calls for inspections, etc. Also known is a communication system with a two-tiered structure in which multiple such systems are collectively managed by a master station, and there is a need to simplify call operations for maintenance and inspections, etc., and to make the configuration more economical. .

[Conventional technology]

FIG. 3 is an explanatory diagram of a two-layer configuration, where 31 is a master station, 32
-1 to 32-n are subsystems, 33 is a relay station, and 34 is a slave station. Such a two-layered communication system is
This corresponds to a configuration in which independent subsystems are centrally managed by the master station 31, and the configuration allows the master station 31 to specify the slave stations 34 of each of the subsystems 32-1 to 32-n and make calls. ing.

FIG. 4 shows the main parts of a conventional example of such a two-layer communication system. That is, the data terminal device 38 of the master station 31, the data terminal device 39 of the relay station 33, and the data terminal device 40 of each slave station 34 are connected via the data line 35, and the communication terminal device 41 of the master station 31 and each The slave station 34 is connected to a telephone terminal device 42 via a telephone line 36 .

Note that the relay station 33 can also be provided with a telephone terminal device connected to the telephone line 36 as shown by the dotted line.

When an arbitrary slave station is specified from the call terminal device 41 of the master station 31, a selection signal is sent from the data terminal device 38 to the data line 35.
The data is transmitted to the data terminal device 40 of each slave station 34 via. Each data terminal device 40 identifies whether or not its own slave station is designated, and if a Shiroko station is designated, the data terminal device 40 performs calling control of the call terminal device 42, and the call terminal device 42 is Upon response, the response information is sent from the data terminal device 40 to the data terminal device 38 of the master station 31. Thereby, a call can be made between the call terminal device 41 of the master station 31 and the call terminal device 42 of the slave station 34.

In addition, when a call request is made from the slave station 34, the data terminal device 40 of the slave station 34 sends the call to the master station 3 via the data line 35.
A call request signal is sent to one data terminal device 38.

When the telephone line 36 is vacant, the data terminal device 38 of the master station 31 transmits a permission signal to the slave station requesting a call, thereby communicating with the telephone terminal device 41 of the master station 31 in the same way as in the above case. , a call can be made with the call terminal device 42 of the call requesting slave station 34.

In the building management system, various controlled devices such as various sensors and air conditioners are connected to the data terminal device 40 of each slave station 34, and data of the data terminal device 38 of the master station 31 and each slave station 34 are connected. Detection signals, control signals, and the like are transmitted and received to and from the terminal device 40 via the data terminal device 39 of the relay station 33 .

Also, as a subsystem, when making a call between the relay station 33 and any slave station 34, a dedicated call line is provided between the relay station 33 and each slave station 34, or a communication line between the relay station 31 and the relay station 34 is provided. A dedicated telephone line 37 is provided between the base station 33 and the telephone terminal device 43, 44 to make a telephone call, and based on this, the telephone terminal device of the master station 31, 41 calls the designated slave station 34. becomes.

[Problem to be solved by the invention]

As mentioned above, in the conventional two-layer communication system, the master station 31 and each subsystem 32-1 to 32-n
Telephone calls to and from each slave station 34 within the network are conducted via a telephone line 36. In addition, if existing subsystems are integrated to create a two-layer configuration, the functions of the master station within the subsystem will be integrated into the master station 31 of the two-layer communication system, so the relay station 33 will slave station 34 within
The configuration makes it impossible to call.

Therefore, when it becomes necessary to make a call between the relay station 33 and the slave station 34, the master station 31 can communicate with the call terminal device 41 by using the call terminal devices 43 and 44 connected through the dedicated call line 37. This has the drawback that the communication operation between the relay station 33 and the slave station 34 becomes complicated.

In order to avoid such drawbacks, relay station 33 and each slave station 3
It is conceivable to install a dedicated telephone line between the two. However, installing a dedicated telephone line separately from the existing or newly installed telephone line 36 between the master station 31 and each slave station 34 has the drawback of causing an economical problem.

An object of the present invention is to enable communication between a relay station and any slave station with an economical configuration.

[Means to solve the problem]

The call switching control method of the present invention is to provide a switching circuit in the relay station to switch the call route between the relay station and the master station and between the relay station and the slave stations, as shown in FIG. Refer to and explain.

A plurality of subsystems 2 consisting of a relay station 3 and a plurality of slave stations 4 are connected to a master station 1 having a data terminal device 5 and a call terminal device 6 through a data line and a call line. In a two-layered communication system, a call is made between a call terminal device 6 of a master station and a call terminal device 8 of a slave station 4 according to a selection signal between a terminal device 5 and a data terminal device 7 of a slave station 4. The relay station 3 includes a data terminal device 9 connected to the data line 13, a telephone terminal device 10 equivalent to the telephone terminal device 8 of the slave station 4, and a telephone terminal device equivalent to the telephone terminal device 6 of the master station 1. device 11, telephone line 14, and telephone terminal device 10
．． 11, and a switching circuit 12 for switching between the master station 1 and the master station 1.
A call route between the call terminal device 6 of the relay station 3 and the call terminal device 8 of each slave station 4 via the relay station 3, and a call path between the call terminal device 11 of the relay station 3 and the call terminal device 8 of each slave station 4. The switching circuit 12 switches between the communication routes and the call route.

[Effect]

Since the telephone terminal device 10 of the relay station 3 is configured to be called by the master station 1 similarly to the telephone terminal device 8 of each slave station 4,
Communication between the master station 1 and the relay station 3 is possible. When the switching circuit 12 switches and connects the call terminal device 11 to the call line 14, the call terminal device 11 switches to the call terminal device 6 of the master station 1.
Since it has a function similar to that of the telephone terminal device 11, each slave station 4 can be called using this telephone terminal device 11. Therefore, even if existing subsystems are integrated to create a two-layer configuration, simply adding the call terminal device 11 and switching circuit 12 to the relay station 3 will allow communication between the relay station 3 and any slave station 4. Calls can be made.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a block diagram of an embodiment of the present invention, in which 11 is a master station, 12 is a subsystem, 13 is a relay station, 14 is a slave station,
15, 17, and 19 are data terminal devices, 16.18 are call terminal devices, 20 are call terminal devices equivalent to the call terminal device 18 of the slave station 14, and 21 are call terminals equivalent to the call terminal device 16 of the master station 11. 22 is a switching circuit, 23 is a data line, 24 is a telephone line, and 25 and 26 are push button switches.

The master station 11 has a data terminal device 15 and a call terminal device 16, and is connected to each subsystem 12 via a data line and a call line. The relay station 13 in the subsystem 12 has a data terminal device 19 and a call terminal device 20.
．． 21 and a switching circuit 22, in which the switching circuit 22 is controlled by a push button switch 25, 26, and is connected to the switching connection between the data terminal device 19 and the call terminal device 21, and the call line 24 on the side of the slave station 14. This is to perform switching connection between the call terminal device 16 of the master station 11 and the call terminal device 21 of the relay station 13.

Each slave station 14 also has a data terminal device 17 and a call terminal device 1.
8 and are connected in series to the data line 23 and the telephone line 24, respectively, and the telephone terminal device 18 is connected to the telephone line 24 under the control of the data terminal device 17;
Detachment is performed and its status information is transferred to data terminal equipment 17.

In the case of a building management system, various sensors and various controlled devices such as air conditioners are connected to the data terminal device 17 as in the conventional example, and detection signals from the various sensors are sent to the master station 11 via the data line 23. Control signals for various controlled devices that are transmitted to the data terminal device 15 are transmitted from the data terminal device 15 of the master station 11 via the data line 23.

The telephone terminal device 20 in the relay station 13 has an equivalent configuration to the telephone terminal device 18 in the slave station 14, and is connected to the telephone line 24 under the control of the data terminal device 19.
Detachment takes place. Further, the telephone terminal device 21 has a configuration equivalent to the telephone terminal device 16 of the master station 11, and when connected to the telephone line 24 via the switching circuit 22, it can be used to connect any slave station 14.
can be specified.

The switching circuit 22 enters the illustrated switching connection state by pressing the push button switch 25, for example, and the relay station 13, like the master station 11, specifies an arbitrary slave station 14 from the telephone terminal device 21 and makes a call. be able to. Also push button switch 26
By pressing , the call terminal device 16 of the master station 11 and the call terminal device 18 of the slave station 14 are connected via the call line 24. A telephone call can be made by specifying the slave station 14. Therefore, the relay station 13 can communicate with the master station 11 in the same manner as the slave station 14, and the subsystem 1
As a master station of 2, communication between any 6 slave stations is possible.

Therefore, without installing a dedicated telephone line between the relay station 13 and each slave station 14, it is possible to designate any slave station 14 and make a call from the telephone terminal device 21 of the relay station 13. Also, since it is possible to communicate between the relay station 13 and the master station 11 using the telephone terminal device 20 corresponding to the slave station of the relay station 13, even in this case, the communication between the master station 11 and the relay station 13 is possible. During this time, there is no need for a dedicated telephone line as in the conventional case.

〔Effect of the invention〕

As explained above, the present invention provides that the relay station 3 includes a data terminal device 9, a call terminal device 10 equivalent to the call terminal device 8 of the slave station 4, and a call terminal device 10 equivalent to the call terminal device 6 of the master station 1. A terminal device 11 and a switching circuit 12 are provided, and calls between the master station 1 and any slave station 4 in the subsystem 2 are carried out by the telephone terminal device 6.8. A call between the relay station 3 and any slave station 4 in the subsystem 2 is made by controlling the switching circuit 12. , can be performed by the call terminal devices 11 and 8 by switching and connecting the call terminal device 11 to the call line 14.

Therefore, by simply adding a slight configuration to the relay station 3, communication between the relay station 3 and the master station 1, and communication between the relay station 3 as the master station in the subsystem 2 and any slave station 4 is possible. It has the advantage that calls can be made with simple operations using an economical configuration, and even when a two-layer communication system is constructed by integrating existing subsystems, it is easy to use with just a small addition of configuration. There are advantages that can be realized.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of the principle of the present invention, FIG. 2 is a block diagram of an embodiment of the present invention, FIG. 3 is an explanatory diagram of a two-layer configuration, and FIG. 4 is a block diagram of a conventional example. 1 is the master station, 2 is the subsystem, 3 is the relay station, 4 is the slave station,
5.7.9 is a data terminal device, 6.8 is a call terminal device,
10 is a call terminal device equivalent to the call terminal device of the slave station; 11
12 is a switching circuit, 13 is a data line, and 14 is a speech line.

Claims (1)

[Claims] A master station (1) having a data terminal device (5) and a call terminal device (6) has a plurality of subsystems (1) consisting of a relay station (3) and a plurality of slave stations (4). 2) via a data line and a telephone line, and according to a selection signal between the data terminal apparatus (5) and the data terminal apparatus (7) of the slave station (4), the telephone terminal apparatus of the master station (6) In a two-layered communication system in which a call is made between a call terminal device (8) of the slave station (4), the relay station (3) is connected to a data terminal device (9), A telephone terminal device (8) equivalent to the telephone terminal device (8) of the slave station (4)
10), a telephone terminal device (11) equivalent to the telephone terminal device (6) of the master station (1), and a switching circuit (12), the telephone terminal device (6) of the master station (1) and the relay station (3
) between each slave station (4) and the call terminal device (8), and the call terminal device (11) of the relay station (3).
A call switching control method characterized in that the switching circuit (12) switches the call path between the terminal device (8) of each slave station (4) and the call terminal device (8) of each slave station (4).