JPS63129748A - Digital data communication system - Google Patents

Abstract

PURPOSE:To attain data communication by transmitting and collating terminal attribute data so as to revise the data into the received attribute data in case of the connection with a terminal equipment set with the data having a different attribute data in the line exchange connection. CONSTITUTION:A control signal separated from a data signal by an exchange interface section 7 is sent to the control circuit 9 of a control section 3 to control the line connection and the terminal attribute data of the transmitting side terminal equipment sent from the line terminator M of the transmitting side at incoming connection and the terminal attribute data set in a terminal attribute data set section in its own station terminal equipment are collated. If it is discriminated that the attribute data is difference, the attribute data of the originating terminal sequipment is output to the receiver terminal equipment together with the incoming signal. Whether the attribute data is revised and replied depending on the data or a rejection signal to the incoming call is sent as disabled communication is discriminated.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a digital data communication system, and particularly to a terminal attribute data matching system.

[Prior Art] Conventionally, this type of data communication system has only connected terminals having certain predetermined attribute data, and therefore the attribute data of the terminals has not been compared.

[Problem that the invention seeks to solve]

In the conventional digital data communication method described above, only the connection of predetermined data terminals is taken into consideration and there is no attribute data matching function, so if a data terminal with a different attribute is called, the line will be connected. The drawback was that data communication was not possible.

An object of the present invention is to provide a digital communication system that allows data communication even for data terminals with different attributes.

[Means for solving problems]

The present invention includes means for setting terminal attribute data, means for transmitting the set terminal attribute data to a communication partner's line termination device, and means for comparing the received terminal attribute data with the attribute data of the own terminal. This digital data communication system is characterized by having means for transmitting the received attribute data of the other terminal to the local terminal when there is a difference between the attribute data of the two terminals.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of the line terminating device M according to the method of the present invention, and FIG. 2(a) is a block diagram showing the line terminating device M of FIG.
Fig. 2(b), which is a relay system diagram to which this is applied, shows the signal format. In FIG. 1 and FIG. 2(a), the signal from the data terminal T is transmitted to the data terminal interface section 1 using TTL.
In the communication path section 2, the line control signal from the terminal interface section 1 is converted into a signal by a signal conversion section 4, and then sent to the control section 3. Further, the data signal from the terminal interface section 1 is sampled by the sampling circuit 5, and then sent to the exchange interface section 7 with the F bit, the ER multiplied signal S bit, and the Its signal added to the envelope circuit 6.

The line control signal converted by the signal conversion section 4 is sent to the control section 3 and analyzed by the firmware program of the control circuit 9. The terminal attribute data is set by the terminal attribute data setting section 8 and read by the control circuit 9.

The line control signal and terminal attribute data analyzed by the control circuit 9 are converted into a control signal format for use between the digital exchange and the line termination device M, and sent to the exchange interface section 7 of the communication path section 2. The exchange interface section 7 multiplexes the digital data signal converted to 64 bps by sampling and envelope and the control signal and sends it to the digital exchange D4.

Further, a signal in which a digital data signal and a control signal are multiplexed from the exchange is separated into a data signal and a control signal by the exchange interface section 7. The data signal is separated into ER and RS signals from the F bit and S bit by the envelope section 6, converted to the data rate of the terminal by the sampling circuit 5, and sent to the data terminal interface section 1. - The power control signal is sent to the control circuit 9 of the control unit 3 to control the connection operation of the line, and in particular, when an incoming call is connected, the terminal attribute data of the sending terminal sent from the line termination device M on the sending side The terminal attribute data set in the terminal attribute data setting section 8 is compared with the terminal attribute data on the station terminal side.

If it is determined that there is no problem with data communication by comparing the attribute data of both terminals, an incoming signal is sent to the data terminal through the data terminal interface 1.

Furthermore, if it is determined that the attribute data are different through comparison, the attribute data of the calling terminal is output to the receiving terminal along with the incoming signal. Based on this data, the terminal side determines whether to respond by changing the attribute data or to send out a rejection signal for the incoming call, indicating that communication is not possible.

〔Effect of the invention〕

As explained above, the present invention transmits and checks terminal attribute data, so that even when connected to a terminal with different attribute data settings in a single circuit switching connection, it is possible to change to the received attribute data and perform data communication. can.

In addition, by sending the line number of the calling terminal in the terminal attribute data, it can be used as an automatic terminal ID transmission function, and since this IO cannot be sent artificially, it has the function of protecting data confidentiality. It has the effect of

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a line termination device according to the method of the present invention, FIG. 2(a) is a relay system diagram of the present method, and FIG. 2(b) is a signal format. DESCRIPTION OF SYMBOLS 1... Data terminal interface section, 2... Communication path section, 3... Control section, 4... Signal conversion section, 5... Sampling circuit, 6... Envelope circuit, 7...
Exchange interface section, 8...attribute data setting section,
9...Control circuit

Claims (1)

[Claims] (1) means for setting terminal attribute data; means for transmitting the set terminal attribute data to the communication partner's line terminating device; and means for comparing the received terminal attribute data with the attribute data of the own terminal; 1. A digital data communication system comprising: means for transmitting attribute data of a partner terminal received to a local terminal when there is a difference in attribute data between the two terminals.