JPH02143634A - External storage device in exchange system - Google Patents

Abstract

PURPOSE:To use a storage device simultaneously from plural data terminal equipments by making the plural data terminal equipments accessible to the storage device via a channel switch. CONSTITUTION:When a data terminal equipment 101 makes a call to an exchange 10, and requests the connection to an external storage device 103, a main storage device 2 controls a channel switch 1 to connect the terminal equipment 101 and a control circuit control circuit 31 to start the communication. Then a data of the device 103 read by an external storage device control circuit 32 is supplied to the circuit 31 and given to the terminal equipment 101 via a switch 1. Simultaneously, when a data terminal equipment 102 is going to make access, the same operation is implemented and the terminal equipments 101,102 are accessible to the device 103 separately simultaneously.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an external storage device in an exchange, and more particularly to an external storage device in an exchange that can be arbitrarily accessed from a plurality of data terminals housed in the exchange.

[Conventional technology]

Conventional private branch exchanges (PBXs) were primarily intended for telephone calls.

On the other hand, recently, data terminals such as personal computers have been housed in PBXs, and data has been transmitted between them and other data terminals.

The system configuration in this case will be explained with reference to FIG. That is, the PBX exchange 100 accommodates a first data terminal 101 and a second data terminal 102.
An external storage device 103 is directly connected to the data terminal 102 . That is, the external storage device 103 is connected to the second data terminal 102 in a 1:1 relationship.

The external storage device 103 stores a database of various programs created by an operator using the first data terminal 102, for example.

In such a system, in order for the first data terminal 101 to use the database stored in the external storage device 103, the first data terminal 101 first sends a call to call the second data terminal 102. Set up a call route.

Next, by communicating according to a predetermined procedure, it becomes possible to commonly use the database stored in the external storage device 103.

[Problem to be solved by the invention]

By the way, in the conventional system configuration shown in FIG. 2, even if an attempt is made to access the external storage device 103 from the first data terminal 101, if the second data terminal 102 is not in a communicable state, the external storage device 103 is not accessed. could not be used.

Further, suppose, for example, that when the third data terminal 104 attempts to access the external storage device 103, the first and second data terminals happen to be in the middle of data communication.

In this case, the second data terminal 102 and the exchange 100
Since the communication path switch was connected by only one communication path, it could only be connected to one data terminal at a time. In other words, even if valuable databases were stored in an external storage device, only one data terminal could use the external storage device at any given time, and multiple data terminals could not use it at the same time.

[Means to solve the problem]

The present invention provides a communication path switch that passes various signals such as call signals and data transmission signals emitted from housed telephones and data terminals, and a communication path switch that stores data such as various programs, and which can be freely transmitted from a plurality of data terminals, etc. an external storage device in an exchange that is equipped with a storage device that can be accessed, and a control means that controls a call path switch to connect to a desired storage device using a predetermined access signal from a data terminal, etc. housed in the exchange. It is.

In this way, the exchange control allows access to the storage device from a plurality of data terminals, and the valuable database can be used simultaneously from a plurality of data terminals.

〔Example〕

The present invention will be explained below based on illustrated embodiments.

FIG. 1 is a block diagram showing an embodiment of an external storage device in an exchange according to the present invention. It should be noted that constituent members that have already been explained will not be explained again, and will simply be given the same reference numerals.

As shown in the figure, the exchange 10 includes a communication path switch 1, a main controller 2, an external storage device controller 3, and an external storage device 10.
It is composed of 3 etc.

The communication path switch 1 includes a first data terminal 101 and a second data terminal 101.
A data terminal 102 is housed therein.

A main control device 2 is connected to the communication path switch 1 and the external storage device control device 3 via a control bus 4, and the main control device 2 controls these devices.

The external storage device control device 3 is interposed between the communication path switch l and the external storage device 103°, and includes a communication control circuit 31 that is directly connected to two time slots of the communication path switch 1, and the external storage device 103. , and a control circuit 33 that controls the communication control circuit 31 and the external storage control circuit 32 described above.

The operation of this embodiment configured as above will be explained.

Now, the first data terminal 101 is connected to the external storage device 103.
The file will be transferred between.

First, the first data terminal 101 makes a call to the exchange 10 and requests connection to the external storage device 103. When the main controller 2 recognizes the call, it controls the communication path switch 1 and connects the first data terminal 101 and the external storage device controller 3.
The internal communication control circuit 31 is connected. Communication between the external storage device control circuit 3 and the first data terminal 101 is thereby started. The communication control circuit 31 is connected to the first data terminal 1
Upon receiving a “data read request” or “write request” on the external storage device 103 sent from 0I, the control circuit 33
convey that information to. The control circuit 33 analyzes the information, controls the external storage device control circuit 32 and the communication control circuit 31, and realizes file transfer between the data terminal 101 and the external storage device 103.

For example, if a “read request” is received, the control circuit 3
3 is the external storage device control circuit 32, and the external storage device 1
03, instruct "open file" and "read file".

The data on the external storage device 103 read by the external storage device control circuit 32 is passed to the communication control circuit 31 and sent to the first data terminal 101 via the communication path switch 1.
passed to. When the reading of the file is completed, the control circuit 33 sends the external storage device 103 to the external storage device control circuit 3.
``Instruct to close the file'' above.

As above, the external storage device 10 from the first data terminal 101
3, but even if the second data terminal 102 attempts to access at the same time, the same operation will be performed to access the first data terminal 102.
It becomes possible for the second data terminals 101 and 102 to access the external storage device 103 simultaneously and separately.

Further, for example, programs etc. created separately by the first data terminal 101 and the second data terminal 102 are stored as a database in the external storage device 103,
It is also possible to use them mutually.

Furthermore, by adding the external storage device control device and external storage device used in the present invention to an existing PBX system exchange, it becomes possible to construct a system that can share a database at a relatively low cost.

Although this embodiment has been described assuming that two data terminals are connected simultaneously to the external storage device control circuit 3, it is assumed that there are as many data terminals as there are time slots of the communication control circuit 31 connected to the communication path switch 1. Of course, they can be connected at the same time.

〔Effect of the invention〕

As described above, the present invention allows a plurality of data terminals to access a storage device via a call path switch, and allows a plurality of data terminals to use the storage device at the same time.

In addition, since the external storage device exists as part of the switch, even if there is a momentary power outage, the countermeasures against momentary power outages for the switch can be used as is, ensuring stable operation. be able to.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an external storage device in an exchange showing an embodiment of the present invention, and FIG. 2 is a block diagram of an external storage device in a conventional exchange. DESCRIPTION OF SYMBOLS 1... Call path switch, 2... Main control device, 3... External storage device control device, 31...
...Communication control circuit, 32...External storage device control circuit, 33...
...Control circuit, 101...First data terminal, 102...
...Second data terminal, 103...External storage device.

Claims (1)

[Scope of Claims] A communication path switch that passes various signals such as call signals and data transmission signals emitted from housed telephones and data terminals, etc., and a communication path switch that stores data such as various programs and connects a plurality of data terminals, etc. A switching system characterized in that it is equipped with a storage device that can be accessed arbitrarily from the storage device, and a control means that controls a communication path switch to connect to a desired storage device using a predetermined access signal from an accommodated data terminal or the like. External storage device.