JPH0397356A - Telephone equipment provided with intercom and telephone set - Google Patents

Abstract

PURPOSE:To prevent data destruction and malfunction by stopping the transmission of succeeding data when a pulse timing of a received collision discrimination data and a pulse timing of collision discrimination data sent by itself are deviated. CONSTITUTION:A communication data discrimination section 7 applies data fetch processing from a communication data reception section 6. When it is confirmed that other telephone set is not sending a data with a signal from the communication data reception section 6, a collision discrimination data generating section 5 outputs a collision discrimination data and it is sent to a common line 11 via the communication data transmission section 5. Then a data representing the state of own telephone set is outputted from a communication data transmission section 3 and sent to the common line 11 and when a telephone set of a set number 2 is going to send a 1st pulse just after a telephone set of a set number 3 sends a 1st pulse, since the 1st pulse from the telephone set of the set number 3 is received also by the telephone set of the set number 2, the telephone set of the set number 2 stops the data transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION - Field of Industrial Application The present invention relates to a telephone device with an intercom that is capable of making internal calls and is constituted only by a plurality of terminal telephones connected to a common line.

2. Description of the Related Art Traditionally, telephone systems for selectively connecting multiple terminal telephones to outside lines have been ones that use a private branch exchange as shown in Fig. 6, or those that use a control device as shown in Fig. 7. There are home telephones, etc., which are configured from terminals. Both devices are connected to an outside line and are composed of a device (hereinafter referred to as the main device) that has a switching function and a plurality of terminal telephones, and are capable of making calls with the outside line and between terminal telephones. In a system equipped with such a main device, the main device can manage the usage status of each phone, that is, whether it is in use or idle, based on the data sent from each terminal phone. The electricity is on.

There is also a telephone system with an intercom that consists only of terminal telephones without a main device, and it is possible to make internal calls between each terminal telephone as well as to make external calls.

Problems to be Solved by the Invention However, in such a telephone system with an intercom without a main device, each telephone only transmits and receives a ringing signal when an extension is called, and only sends and receives a ringing signal between multiple telephones connected in parallel. Data representing the status of each telephone, such as which set is using an outside line, is not transmitted or received, and therefore cannot be displayed to the user. Even if the configuration is configured to send and receive data representing the status of the telephone, in such a shared line system, multiple telephones send data on a single line, so data collisions may occur. destruction is likely to occur. That is, when a plurality of telephones start transmitting data at the same time, there is no way to detect this and the data is destroyed, causing malfunctions.

The present invention has been made in view of the above-mentioned prior art, and it is an object of the present invention to provide a telephone device with an intercom that prevents data from being destroyed and does not malfunction.

Means for Solving the Problems In order to achieve this object, the intercom telephone device of the present invention generates collision determination data for each telephone, consisting of a plurality of pulses having different pulse intervals for each telephone. a collision determination data generating means; and a communication data transmitting means for first transmitting the collision determination data generated by the collision determination data generating means and then transmitting data representing the state of the telephone at that time to a common line to which each telephone is connected in parallel. , a data receiving means for receiving various data on the common line, and when the pulse timing of the collision determination data received from the common line and the pulse timing of the collision determination data transmitted by itself are different, the communication data is An attempt was made to stop the sending means from transmitting any further data.

Effect By setting up the structure as described above, if the collision determination data received by the data receiving means and the collision determination data transmitted by itself do not match, the determination means transmits data to others. It is possible to recognize the presence of a telephone and cancel subsequent data transmission.

EXAMPLE An example of the present invention will be described below with reference to the drawings.

FIG. 1 is a functional block diagram of a telephone comprising an intercom telephone device according to an embodiment of the present invention. In FIG. 1, reference numeral 1 indicates a key manual section for operating the telephone. 2 is a key data processing unit that performs processing corresponding to each key of the telephone; 3 is a status data generation unit that generates data representing the status of its own telephone; and 4 is an output data signal according to the operation and situation of the telephone. 5 is a communication data sending unit; 5 is a collision determination data generating unit; 6 is a communication data receiving unit for receiving data output from other telephones and the telephone; 7 is a communication data receiving unit for receiving data outputted from other telephones and itself; 7 is a content analysis of input data and data processing by a method to be described later. 8 is a control section that controls the telephone according to signals from the communication data discrimination section and the key data processing section; 9 is a voice communication section; and 10 is a signal input/output line.

FIG. 2 is a diagram showing a data discrimination signal for detecting a data collision and a transmission pattern of the subsequent data signal. The first two pulses Pi and P2 are data collision determination signals, followed by the original data signal.

When the first pulse for collision determination is sent out, the communication data determination section 7 is configured to perform data acquisition processing for at least nT seconds plus some time. Furthermore, if the next pulse is detected nT seconds after the first pulse is sent out, the communication data discriminator 7 considers itself to have priority; If an external pulse is detected before nT seconds have elapsed since it was sent, it is assumed that another signal has priority. Further, even in the standby state, if an external pulse is received, data is not transmitted for a predetermined period thereafter.

In FIG. 3, 11 is a common line provided for the intercom function, and each signal input/output line 10 of the telephone terminal configured as described above is connected to a common line as shown in FIG. 11.

Next, the operation will be explained. Note that the explanation here will be based on a system that can connect up to five devices. First, during initial setup,
From the key power section 1 of each telephone to the set number n of that telephone
(n=1 to 5). As a result, the time between two pulses of the collision determination signal in the data signal shown in FIG. 2 is set to nT seconds for the set with set number n.

Next, the operation when one telephone in the intercom system sends data will be explained.

First, the communication data discriminating section 7 performs data acquisition processing from the communication data receiving section 6. When it is confirmed by the signal from the communication data receiving section 6 that no other telephone is transmitting data, the collision determination data generating section 5 outputs the collision determination data shown in FIG. It is sent out to the common line 11 via. Then, data indicating the status of the own telephone is outputted from the communication data sending unit 3 and sent to the common line 11.

Here, for example, as shown in FIG. 4(b), set number 3
Figure 4 (
The case where the telephone set number 2 attempts to send data as shown in a) will be explained. When the telephone with set number 3 sends out the first pulse for collision determination, the communication data determination section 7 of the telephone then performs data acquisition processing for at least 3T seconds plus some time. By the way, in this case, immediately after the phone with set number 3 sends out the first pulse, the phone with set number 2 tries to send out the first pulse, but in reality, the phone with set number 3 sends out the first pulse. Since the first pulse from the set number 2 will also be received by the telephone set number 2, the telephone set number 2 will stop transmitting data and no collision determination data will be transmitted. Since the telephone with set number 3 detects the next pulse only 3T seconds after the first pulse is sent, it considers itself to have priority. After the telephone set number 3 transmits the second pulse, it transmits the data signal.

However, for example, as shown in FIG. 5, when another telephone starts transmitting data at the same time as the other telephone, the first pulse PI of the collision detection data in the data signal
overlap. In this case, the priority order is not determined at the stage when the first pulse is sent out. However, since the interval until the second pulse is sent out differs for each set, one of the telephones will always send out the second pulse first. Then, the phone whose communication data discrimination unit detects that the second detected puzzle is different from its own output determines that it does not have priority, and uses the data after the second pulse of the collision detection signal. Sending will be canceled.

This allows the data on the other phone to be sent without being destroyed.

For example, as shown in FIGS. 5(a) and (b), set number 2
Considering the case where a telephone with set number 3 and a telephone with set number 3 send data at the same time, the interval between two pulses of collision detection data is 2T seconds for the telephone with set number 2 and 3T seconds for the telephone with set number 3. Upon receiving the second pulse of the collision detection signal from the set number 2 phone, the set number 3 phone determines that another phone is sending data, and stops sending any further data. Only the second telephone transmits data.

Effects of the Invention As described above, the present invention provides a state data generation means for each telephone, which generates data representing the state of the telephone at that time, and a collision detection method consisting of a plurality of pulses having different pulse intervals for each telephone. Collision determination data generation means that generates data, first the collision determination data generated by the collision determination data generation means, and then data generated by the status data generation means are transferred to a common line to which each telephone is connected in parallel. Communication data sending means and communication data receiving means for receiving various data carried on the common line are provided, and the pulse timing of the collision determination data received by the communication data receiving means and the collision determination data transmitted by itself are provided. By configuring the communication data sending means to stop sending out subsequent data if the pulse timing of The user can immediately check the usage status of other phones, and the determination means uses the collision determination data received by the data receiving means and the collision determination sent by the user. If the data does not match, it recognizes that there is another phone that sent the data, and can stop sending the data from now on.This prevents data content from being destroyed due to data collisions, and prevents the data from being destroyed. Malfunctions caused by destruction can be eliminated, and its practical effects are great.

[Brief explanation of drawings]

Figure 1 shows the functional block structure of an example of a telephone that constitutes the telephone device with intercom of the present invention; Figure 2 shows the structure of collision detection data and data signals of the telephone device with intercom. The figure is a schematic configuration diagram of a telephone device with an intercom according to the present invention, FIGS. 4 and 5 are explanatory diagrams illustrating the data transmission timing of two telephones in the telephone device with an intercom, and FIG. 6 is a diagram of a conventional telephone device with an intercom. FIG. 7 is a schematic diagram of a telephone system using an exchange. FIG. 7 is a diagram of a conventional home telephone. Fig. 1 6 1...Key human power section 2...Key data processing section 3...Status data generation section 4...Communication data sending section 5...Collision determination data generation section 6...Communication data Receiving unit 7...Communication data determining unit 8...Control unit 9...Voice communication unit 10...Signal input/output line 11...Common line collision identification signal

Claims (2)

[Claims] (1) A telephone device in which a plurality of telephones are each connected to a common line, and each telephone is provided with state data generation means for generating data representing the state of the telephone at that time, and a pulse interval that is different for each telephone. a collision determination data generation means for generating collision determination data consisting of a plurality of pulses, first the collision determination data generated by the collision determination data generation means, and then the data generated by the status data generation means, which are sequentially transmitted to each telephone. communication data sending means for transmitting communication data onto a common line connected in parallel; communication data receiving means for receiving various data carried on the common line; and pulse timing of collision determination data received by the communication data receiving means. and a discriminating means for controlling the communication data transmitting means to stop transmitting subsequent data if the pulse timing of the collision discriminating data sent by the telephone is out of sync. Device. (2) a state data generating means for generating data representing its own state at that time; a collision determination data generating means for generating collision determination data consisting of a plurality of pulses having its own unique pulse interval; communication data sending means for sequentially outputting the collision determination data generated by the collision determination data generating means and then the data generated by the state data generating means to the signal input/output line; and receiving various data input from the signal input/output line. communication data receiving means for transmitting data; and if the pulse timing of the collision determination data received by the communication data receiving means and the pulse timing of the collision determination data transmitted by itself are different, subsequent data by the communication data transmitting means is transmitted. 1. A telephone set comprising: a determining means for controlling to stop transmission of the telephone.