JPH01288132A - Communication equipment - Google Patents

Abstract

PURPOSE:To connect plural communication equipments to one line by discriminating the propriety of the connection to the communication equipment of the next stage based on the discrimination of data address. CONSTITUTION:If an address data sent from a transmitter differs from an address of a receiver, an address discrimination means 2a of a CPU 2 sets a call generating means 5 for a prescribed time, e.g., for one sec, and an output is given to a communication equipment of the next stage. An incoming call detection means detects of the communication equipment of the next stage detects the signal and a closing circuit is closed. The CPU 2 of the communication equipment energizes a relay 6a and deenergizes a relay 3a to connect the line to the communication equipment of the next stage only and then the data transmission is implemented. Then the CPU 2 of the communication equipment deenergizes the relay 6a to open the line.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication device that automatically responds to an incoming call on a line and transmits data.

[Conventional technology] A conventional device of this type is shown in FIG.

In the same figure, (1) is a capacitor (1a) and a relay (
1b) and its normally open contact (IC), (2) is a CPLI, (3) is a closing means consisting of a relay (3a) and its normally open contact (3b), and (4) is a transformer. A communication device that shows a transmission means and has these configurations!
It works like this:

The operation will be explained below based on the flowchart shown in FIG.

First, when a call arrives on the line, the relay (lb) operates (Sl) via the capacitor (1a), which is connected to the contact (IC).
) is detected by CPt1 (2), it turns on relay (3a) (Sl) and closes its contact (3b) to close the line. After that, the CPU (2) turns off the relay (3a) after transmitting data with the other party,
Open the contact (3a) and open the line (S3, S4)
.

[Problems to be Solved by the Invention] Conventional communication devices are configured as described above, so when multiple communication devices are connected to the same line, all the communication devices connect to the line in response to an incoming call to that line. The connection will be closed and normal data communication will not be possible. That is, it was not possible to connect multiple reporting devices to the same line.

The second invention was made to solve the problems in the conventional example as described above, and even if multiple communication devices are connected to the same line, each device can respond normally to incoming calls and transmit data. The purpose is to provide a communication device that can.

[Problems to be Solved by the Invention] A communication device according to the present invention includes an incoming call detection circuit that detects incoming calls on a line, a closing unit that closes the line in response to the operation of the incoming call detection unit, and a data transmission unit that transmits data. A communication device comprising: address determining means for determining the address of data; call generating means for transmitting a call signal to the next device when the address does not match the address of the device; and after operation of the call generating means; and connection means for connecting the line to the next stage device.

[Operation] In the communication device according to the present invention, the address of the received data is determined by the address determining means, and if the address matches, the data is transmitted between the own device and the transmitting device, and if the address does not match, the next stage communication is performed by the call generating means. At the same time as sending a call signal to the device, data transmission is performed between the next-stage device and the transmitting device by means of the connection means.

[Embodiment 1] Hereinafter, an embodiment of the present invention will be described based on FIG. 1, in which the same parts as in FIG. 3 are denoted by the same reference numerals. In FIG. 1, the CPU (2) is provided with an address determining means (2a) for determining the address of the transmitted data, and when the address matches the address, the transmitted data is taken into the device, and when it does not match, it is sent to the next stage device. The call originating means (5) and the connecting means (6) are operated for transmission. Here, the call generating means (5) is configured to make a call only while receiving an on signal from the CPU (2), and the connecting means (6) has a relay (6a) and a contact (6b), Relay (6a
) turns on to connect the line to the incoming call detection circuit of the next device.

The operation of the above embodiment will be explained based on FIG.

When a call arrives on the line, the relay (3a
) is turned on, data is transmitted to and from the post-transmission device (
51-S3). At this time, when the device receives data with a predetermined address, such as roll, data transmission continues because the addresses match (S5, S3°), and after the transmission is completed, the relay (
3) and open the telephone line (S4).

On the other hand, if the address data transmitted from the transmitting device is different from the address ('QQIJ) of the receiving device, for example, r002. is transmitted, the CPU (
The address determining means (2a) of 2) turns on the call generating means (for example, a 16 tlz calling circuit) for a certain period of time, for example, one second, and outputs it to the next stage communication device (S6). The next-stage communication device detects this signal using an incoming call detection means, and closes the closing circuit. CPIJ (2) of the communication device is turned on by turning on relay (6a) and turning off relay (3a) (57, S8)
, data transmission is performed by connecting the line only to the next communication device. Then, the communication device f:PU (2) turns off the relay (6a) after a certain period of time and opens the line <S9.
510).

Note that although the above embodiment has been described for the case of two communication devices, the case of three or more communication devices can be implemented using the same flow.

[Effects of the Invention] As described above, according to the present invention, it is possible to connect multiple communication devices to one line because it is determined whether or not to connect to the next communication device based on the determination of the data address. As a result, line maintenance costs can be reduced, and since the three devices are configured with the same circuit, it is possible to standardize the types of devices.

[Brief explanation of the drawing]

Fig. 1 is a configuration diagram showing one embodiment of the present invention, Fig. 2 is an operational flowchart, and Figs.
FIG. 2 is a conventional configuration diagram and an operation flowchart corresponding to FIG. (1) is an incoming call detection means, (2) is a CPU, (2a) is an address determination means, (3) is a closing means, (4) is a data transmission means (transmission transformer), and (5) is a call generation means. ,(
Ii) is a connection means having a relay (6a) and a contact (Iib). Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] Address determination for determining the address of data in a communication device comprising an incoming call detection means for detecting an incoming call on a line, a closing means for closing the line in response to the operation of the incoming call detection means, and a data transmission means for transmitting data. means, call generation means for transmitting a call signal to the next-stage device when the address does not match the address of the device, and connection means for connecting a line to the next-stage device after the operation of the call generation means. Characteristic communication device.