JPS60196058A - Data transmission receiver - Google Patents

Abstract

PURPOSE:To use, when necessary, the titled device as an orignal telephone set when a telephone set arranged to a device for reception of data supplied from a specific device by deciding a call fed to the telephone of the receiver through a CPU, to open a telephone circuit for reception of data and to close the telephone circuit with a human being and attaining a call between human beings. CONSTITUTION:A means is provided to a CPU to decide a telephone call given from a human being in case the prescribed data is not received through transmission of data. When a call given from a human being is decided, a signal S3 is delivered to sound a sound generator B.U. At the same time, a signal S2 is delivered from the CPU to turn on a relay A. Then a contact (a) of the relay A has a make. Then the CPU decides whether or not the handset of a telephone TEL of a receiver is picked up. When the handset is picked up, an output signal S1 given from the CPU is turned off. Thus a relay CML is turned off and a contact cm1 has a break. Then the receiver is separated from the circuit L and the talking is possible between telephones at the reception and transmission sides respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a receiving device for data transmission using a telephone line, and particularly relates to an improvement in a telephone installed in the receiving device.

[Prior art]

An example of a conventional receiving device of this type will be explained based on FIGS. 1 and 2.

When an incoming call occurs on the telephone line, the incoming signal turns on relay R connected in series to capacitor C via capacitor C (2-1). When the microprocessor (CPU) detects the make of contact r of this relay R,
Emit output signal 81 to turn on relay CML and contact cm
Make l (2-2).

As a result, the telephone line is closed by the transformer T and data transmission becomes possible (2-3).

Therefore, the CPU performs data transmission with a transmitting device (not shown) via the transformer T, and when the data transmission is completed, the CPU turns off the output signal Sl from the CPU.
The ML relay is turned off, the contact point ML is broken, and the telephone circuit is opened (2-4).

By the way, when the above-mentioned receiving device is connected to a general subscriber telephone line, it is necessary to provide a telephone +f& to the above-mentioned receiving device, but when a call is received from a person to the above-mentioned telephone, the following inconvenience occurs. That is, since the receiving device receives and responds to an incoming call signal from a person using a telephone, there is an inconvenience that the telephone itself provided in the receiving device cannot be used for making calls.

[Summary of the invention]

The present invention has been made in view of the above-mentioned points, and provides a receiving device that allows the telephone to be used as a normal telephone when a person makes a call to the telephone provided in the receiving device for data transmission. The purpose is to

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 6 and 4.

In FIG. 3, the same parts as in FIG. 1 are given the same reference numerals, and detailed explanations of the same functions will be omitted.

Therefore, when a person calls the telephone TKLK of the receiving device, the same operations as in FIGS. 1 and 2 are performed up to the data transmission of (4-1) to (4-3) in FIG. 4. Next, since the call is from a person, the predetermined data is not transmitted to the receiving device, and therefore, a discriminating means fcPU is provided for discriminating this as a transmission abnormality.

That is, in (4-4), means is provided for determining that the call is from a person when the predetermined data from (4-3) is not received. Next, if the above-mentioned discrimination means indicates that the call is from a person, means is provided to output a signal S3, and this signal S3 causes the sounding device B-U to ring (4-5) o At the same time, the CPU outputs a signal S2. Then, turn on relay Af and make its contact a (
4-5). Further, a means (4-6) for determining whether or not the handset of the telephone device provided in the receiving device is removed is provided in all cpas, and when the handset of the telephone device is removed,
When relay B is turned on and its contact is turned on, cpσ detects this and turns off the output signal S from the CPU. This causes the CML relay to turn off.4-
7) The contact cml breaks and the receiving device and telephone line are disconnected. According to the above, the telephone on the receiving device side and the telephone on the transmitting side can communicate with each other.

Note that the above-mentioned sounding device B/σ is used to notify a person located near the receiving device that there is an incoming call from a person on the phone @ T E L of the receiving device, rather than data transmission from a specific device. Therefore, it is not necessarily limited to a sounding device, but may be an appropriate display device such as one that repeatedly blinks.

In addition, in the above embodiment, at the same time as the sound generation device sounds, the CPU
After outputting the signal S and turning on the relay A, the handset of the telephone device is picked up to turn on the relay B, and then the CML relay is turned off by the signal S, but the sound device jiB If the handset of the telephone is not picked up even after a certain period of time has elapsed after the -t and r rings, the CPU may be provided with means for detecting this, and the CML relay may be turned off to open the line.

〔Effect of the invention〕

As described above, when a telephone call is received from a person on a telephone set in a receiving device for receiving data from a specific device, the present invention distinguishes the call by CPO, opens the telephone line for data reception, and Since the telephone line with the telephone line was closed to enable people to talk to each other, it could be used as a telephone for telephone calls if necessary, which would increase the amount of free dust.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional data transmission receiving device, FIG. 2 is a flowchart showing the operation of the above device, FIG. 3 is a block diagram of a data transmission receiving device showing an embodiment of the present invention, and FIG. The figure is a flowchart of the above device. L...Telephone line R, CML, A, B--Relay T@11 transformer CPU--Microprocessor...Telephone agent Masuo Oiwa Figure 1 Figure 2

Claims (1)

[Claims] In a receiving device for data transmission using a telephone line, there is a discriminating means for discriminating the presence or absence of an incoming signal from a specific device for data transmission, and the telephone line is closed when the discriminating means determines that there is an incoming signal. means for starting data transmission from the specific device; and means for discriminating it as an incoming call signal from a person and transmitting a signal to cause the sounding device to sound if the predetermined data is not transmitted within a certain period of time; Means for opening the telephone line between the receiving device and the specific device transmitting data at the same time as the ringing of the sounding device, and means for closing the telephone line between the telephone provided in the receiving device and the telephone for communication on the transmitting side. A data transmission receiving device comprising: