JPH0470043A - Telephone command system - Google Patents

Abstract

PURPOSE:To cope with the construction of a telephone command system with a single type of telephone command device by performing the outgoing/incoming operations between the telephone command device and a telephone terminal equipment with the different DTMF signals of the telephone terminal equipments used as the address information. CONSTITUTION:A telephone command device 1 transmits a DTMF signal of a frequency corresponding to the prescribed address information contained in a telephone terminal equipment 3. Thus the equipment 3 is called out. The DTMF signal detected at an address extracting part 7 is inputted to a microprocessor 8 via a bus 12 and collated with its own address information stored previously in a storage 9. Thus a call addressed to the equipment 3 is recognized. Then the part 7 starts 8 telephone interface part 10 via the bus 12 to call out a telephone system 3-2 after confirming the coincidence between its own address information stored in an address of the storage 9 and the received address information. When the system 3-2 has an answer, a message channel is formed to the device 1 and a talking state is set.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a telephone command system, and particularly relates to a DTMF (Dual
Tone M+ilt F
The present invention relates to a telephone terminal device having an interface device that can be branched and connected based on a frequency (response) signal.

[Conventional technology]

Conventionally, in this type of telephone command system, a plurality of telephone terminal devices, which are slave devices installed at a slave station, are connected in a concatenated manner to a telephone command device, which is a live device installed at a master station. Each telephone terminal device is equipped with an oscillator that generates a unique oscillation frequency, and the telephone command device is equipped with the same number of oscillators as all the telephone terminal devices are equipped with. The connection from a telephone terminal to a telephone command device was identified by the oscillation frequency assigned to each telephone terminal device.

[Problem to be solved by the invention]

In the conventional telephone command device described above, each time a telephone terminal device is added, an oscillator corresponding to the telephone terminal device must be added to the telephone command device, and a space for accommodating the oscillator must be prepared in advance in the telephone command device. I needed to keep it. Therefore, as the telephone command device becomes larger and it is difficult to estimate the amount of expansion, it is not always possible to prepare an optimal expansion space.

An object of the present invention is to combine address information of a telephone command device and mutually different address information pDT provided in each telephone terminal device.
An object of the present invention is to provide a telephone command system that allows branch connection of a large number of telephone terminal devices by transmitting and receiving M'F signals.

[Means to solve the problem]

The telephone command device of the present invention is a telephone command system in which various commands are sent and received between telephone terminal devices of a plurality of slave stations branch-connected via a command line to a telephone command device installed at a master station. A command device sends predetermined address information of each of the telephone terminal devices as a DTMF signal via the command line, and the telephone terminal devices individually detect and prepare the address information from the command line. It is configured to compare the address information with own address information, and based on the result of the comparison, connect the telephone device included in the telephone terminal device and the telephone command device to form a communication path.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing a system configuration according to an embodiment of the present invention, and FIG. 2 is a block diagram of a telephone terminal device according to an embodiment of the present invention.

FIG. 1 shows a telephone command device 1 that is installed in a master station and transmits and receives various commands to and from the telephone terminal devices of each slave station, and a telephone device 3-2.4.
-2.5-2 to the command line 2 for branch connection 3-1.41.5-1. It consists of a telephone command device and a telephone terminal device 3.4.5 consisting of telephone devices 3-2.4-2.5-2 for exchanging commands.

Figure 2 is the command time! ! 2, a line interface section 6, a communication path 2-1, and an address identification signal path 2.
-2, an address extraction unit 7 that extracts address information addressed to the own telephone terminal device from the address identification signal line 2-2, and an address extraction unit 7 that extracts address information addressed to the own telephone terminal device from the address identification signal line 2-2; Microprocessor+f8 compares and collates the self-address recognition information from the address extraction unit 7, and receives the self-address recognition information from the telephone device 3-2.4-2.5-2.
a telephone interface unit 10 for activating a DTMF signal generating unit 11 for generating a predetermined DTMF signal;
．． It is composed of a telephone terminal device 3-1 consisting of a bus 12 and a PB signal transmission line 13, and command telephone devices 3-2.

Here, from the telephone command device 1 of the master station to the telephone terminal device 3 of the slave station
This will be explained using an example of a command for .

Sending out a DTMF signal of a frequency corresponding to predetermined address information included in the telephone terminal device 3 from the telephone command device 1;
Call the telephone terminal device 3. The sent DTMF signal is
Address identification signal path 2 of command line 2 as shown in FIG.
-2 to the address extractor 7 of the interface device 3.
is input. DTMF detected by address extraction unit 7
The signal is input to the microprocessor 8 via the lotus 12, where it is compared and collated with its own address information stored in advance in the storage device 9, and is determined to be a call to the telephone terminal device 3. When the address extraction unit 7 matches its own address information stored in advance in the storage device 9 with the received address information, it activates the telephone interface unit 10 via the lotus 12 and calls the telephone device 3-2. When the telephone device 3-2 that receives the call responds, a reachable channel is formed between it and the telephone command device 1, and a conversation is established.

Next, a case where the telephone command device 1 is called from the telephone terminal device 3 will be explained.

When the telephone device 3-2 goes off-hook to make a call, for example, the telephone interface section 10 detects an off-footer,
The off-hook detection information is read by the microprocessor 8 via the lotus 12. At the same time, the telephone interface section 10
sends a dial tone to the telephone devices 3-2. The telephone device 3-2 hears the dial tone and subsequently sends out a predetermined DTMF signal indicating the address of the telephone command device 1.

This dial signal is sent to the telephone interface unit 10, PB
is input to the address extraction unit 7 via the signal transmission line 13,
Further, in the microprocessor source 8 which is input to the microprocessor source 8 via the bus 12, it is compared with the address information of the telephone command device 1 stored in advance.
As a result of the verification, when it is recognized that the address is that of the telephone command device 1, the microprocessor 8 sends a DTMF signal corresponding to the address of the telephone command device 1 from the DTMF generation circuit 11 via the address extraction unit 7. Line interface section 6. It is sent to the telephone command unit 1 via the address identification signal path 2-2 of the command line 2. A communication path is thus formed between the telephone terminal device 3 and the telephone command device 1.

The connection between the telephone command device 1 and the telephone terminal device 4 or 5 is carried out in a similar manner. This is prevented by polling from device 1. In addition, the telephone command device 1 and the telephone device 3
-1. ．． 4-2. If there is no connection to or from the telephone terminal device 5-2, the normality of the telephone terminal device is monitored by polling from the telephone command device 1.

Above is the telephone terminal device 3.4. ．． As explained above, it goes without saying that the present invention does not limit the number of terminals that are branch-connected to the command line 2. According to the present invention, different DTMF signals provided in each telephone terminal device are used as address information, and calls are made and received between the telephone command device and the telephone terminal device, so that each time the telephone terminal device is added, the telephone command device Since there is no need to add an oscillator compatible with the telephone terminal device, the telephone command device can be appropriately designed, and one type of telephone command device can support horizontal construction of the telephone command system.

In addition, when adding telephone terminal equipment, D
Since it is sufficient to allocate TMF signals, it is possible to easily branch and connect a large number of telephone terminal devices without adding a command line.

[Brief explanation of drawings]

FIG. 1 is a process diagram showing one embodiment of the present invention. 21J is a block diagram of an interface device showing an embodiment of the present invention. 1...Telephone command device, 2...Command line, 2-1 communication path,
2-2...address identification signal path, 3. ．． 4゜5...Telephone terminal device, 3-1.4-1.5-1...Interface device, 3-2.4-2.5-2...Telephone device, 6.
...Line interface section, 7...Address extraction section, 8
...Microprocessor, 9--Storage device, 10-Telephone interface section, 11...DTMF signal generation section, 1
2...Has, 13...PB signal sending line.

Claims (1)

[Claims] In a telephone command system in which various commands are sent and received between a telephone command device installed in a master station and telephone terminal devices of a plurality of slave stations branch-connected via a command line, predetermined commands are sent and received from the telephone command device. The address information of each telephone terminal device is sent as a DTMF signal via the command line, and the telephone terminal device individually detects the address information from the command line and collates it with its own address information provided in advance. A telephone command system characterized in that, depending on the result, a telephone device included in the telephone terminal device and the telephone command device are connected to form a communication path.