JPH04200059A - Home bus system - Google Patents

Abstract

PURPOSE:To connect all single telephone sets subject to adaptability recognition to the system and to detect the polarity inversion at one position in a master set by providing a control means opening a bypass means and operating a terminal equipment only with a polarity discrimination command from the terminal equipment to the system. CONSTITUTION:A master set 29 is provided with a polarity inversion detection section 32 detecting the polarity inversion of an external line to detect the reply of an opposite party, a bypass means 31 bypassing the polarity inversion detection section 32 and a CPU 3 operating a terminal equipment (automatic notice device or the like) 36 to open bypass means 31, 34 with only a polarity discrimination command from the terminal equipment 36. Thus, since the bypass means 31 is closed in the normal operating state, e.g. in the talking by a single telephone set 50, only a DC resistance of the single telephone set 50 is in existence as the DC resistance when viewed from the external line. Moreover, in the case of the terminal equipment 36 requiring the polarity inversion, the bypass means 31 is released to bring the polarity inversion detection section 32 into the operating state. Thus, all single telephone sets subject to adaptability recognition are connected and the polarity inversion is detected at one location.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF THE INVENTION The present invention relates to a home bus system that is installed in a home and allows calls, reports, etc. to be made by connecting to an outside line.

2. Description of the Related Art Home bus systems of this type include a main device that connects a home bus consisting of a control channel and an information channel to an outside line, and a terminal device that is connected to the home bus. .

In such a home bus system, when an automatic notification device is installed as a terminal device, when this automatic notification device is connected to an outside line via the main device, it detects the polarity reversal of the outside line and detects the other party's response. However, it is necessary to operate the automatic reporting device function.

FIG. 2 shows a method for detecting polarity reversal of an outside line in the conventional home bus system, and is an example in which each terminal is provided with a polarity reversal detection section.

In FIG. 2, the symbol l is the main device, and this main device 1
includes a di relay 2, a CPU 3, and a communication interface 4. The main device 1 connects the outside line and the information channel 5 of the home bus through the DI relay 2. The communication interface 4 of the main device 1 is connected to the control channel 6 of the home bus and sends and receives control signals. CPU 3 controls communication interface 4 .

The terminal device 7 includes a communication path switch 8, a polarity reversal detection section 9, a communication section 1o, a communication interface 11, and a CPU.
12.

In FIG. 2, the outside line is the di relay 2 of the main device 1.
The communication path switch 8, polarity reversal detection section 9, and communication section 10 of the terminal 7 are connected via the terminal 7, and the polarity reversal of the outside line is detected by the polarity reversal detection section 9 and transmitted to the CPU 12. Note that 13 is a terminal.

In such a home bus system, when various terminals that require polarity reversal are connected, each terminal has a polarity reversal detection section, but this is wasteful for the system as a whole. However, there was a problem in that the cost increased.

FIG. 3 is a configuration diagram of a home bus system that solves the problems of the conventional home bus system shown in FIG.
This section shows how to detect polarity reversal all at once using the main device.

In FIG. 3, reference numeral 14 is a main device, and the main device 14
are di relay 15, polarity reversal detection section 16, CPU 17
, a communication interface 18. The main device 14 is
It is connected to a home bus consisting of an outside line, an information channel 5, and a control channel 6. This home bath has
A terminal 19 is connected. This terminal device 19 includes a communication path switch 20, a communication section 21, and a communication interface 2.
2. It consists of a CPU 23. Further, an SLT adapter 24 is connected to the home bus. This SLT adapter 24 includes a communication path relay 25, a communication interface 26, and a CPU 27. Further, the standalone telephone 28 is connected to the information channel 5 via the communication path relay 25.

This conventional example will be explained. For example, when the terminal 19 is in a call, the polarity reversal detection section 16 of the main device 14 detects an outside line.
, di relay 15, then information channel 5, terminal 1
It is drawn into the communication part 21 via the communication path switch 20 of 9. On the other hand, the signal detected by the polarity reversal detection section 16 is C
PU 17, communication interface 18, control channel 6, communication interface 22, and CPU 23.
It is transmitted to In this way, polarity reversal can also be detected using the conventional method described above.

Problem to be Solved by the Invention However, in the home bus system having the outside line polarity reversal detector shown in FIG. 3, when connecting to the outside line, the polarity reversal detector in the main device is always connected in series with the outside line. Become. Therefore, in the case of the above home bus system, SL
When attempting to connect a general stand-alone telephone through the T adapter, the DC resistance value seen from the outside line is the sum of the DC resistance of the polarity reversal detection section and the stand-alone telephone, and all stand-alone telephones that have been certified as compatible are connected. This has the disadvantage that the number of individual telephones that can be connected is limited.

The present invention solves these conventional drawbacks, and provides a home bus that is configured so that all independent telephones that have received compliance certification can be connected, and polarity reversal can be detected at one location within the main device. The purpose is to provide a system.

Means for Solving the Problems In order to achieve the above object, the present invention includes a main device for connecting a home bus consisting of a control channel and an information channel to an outside line, and a terminal device connected to the home bus. In the home bus system, the main device includes a polarity reversal detection unit that detects a polarity reversal of the outside line and detects a response from the other party, a bypass means that bypasses the polarity reversal detection unit, and a polarity determination unit from the terminal device. The present invention is characterized by comprising a control means for opening the bypass means and operating the terminal only in response to a command.

Operation The present invention has the following effects due to the above-described configuration. In other words, in normal usage conditions, for example when talking with a stand-alone telephone, the bypass means is closed, so the DC resistance seen from the outside line is only the DC resistance of the stand-alone telephone, and any stand-alone telephone that has been certified as conforming can be connected. is possible. In addition, in the case of a terminal device that requires polarity reversal (such as an automatic reporting device), by sending a polarity reversal detection command from the terminal device, the bypass means is released and the polarity reversal detection section is activated, allowing the outside line to be connected. detects the polarity reversal of
The terminal can receive the detection signal.

Example The invention will now be described with reference to embodiments of the accompanying drawings.

FIG. 1 shows the configuration of an embodiment of the home bus system of the present invention.

In the home bus system shown in FIG. 1, the main device 29 is
a di relay 30 that connects the outside line and the information channel 5;
A polarity reversal detector 32, a relay contact 31 and a relay coil 34 as bypass means for bypassing the polarity reversal detector 32, a communication interface 33 that connects to the control channel 6 and performs bus communication, and a C that controls them.
It is composed of PU35.

An automatic notification device 36 is connected to the home bus consisting of an information channel 5 and a control channel 6. The automatic notification device 36 includes a communication path switch 37, a voice and data transmitter 38, a communication interface 39, and a CPU 40.

Further, a telephone 41 is connected to the home bus, and this telephone 41 includes a communication path switch 42, a communication section 43, a communication interface 44, and a CPU 45. Similarly, the SLT adapter 46 connected to the home bus includes a communication path relay 47, a communication interface 48,
It consists of a CPU 49 and can connect a standalone telephone 50 to the information channel 5 by a communication path relay 47.

Next, the operation of the above embodiment will be explained.

When the automatic notification device 36 makes a call, the call command issued by the CPU 40 is sent to the control channel 6 through the communication interface 39.

This outgoing command on the control channel 6 is transmitted to the CPU 35 through the communication interface 33. CPU3
5 causes the di relay 30 to close. Thereby, the automatic notification device 36 is connected to the outside line. After dialing, the automatic notification device 36 sends a polarity reversal detection command onto the control channel 6.

Thereby, in the main device 29, the CPU 35 drives the relay coil 34 to release the contact 31. As a result, the polarity reversal detection section 32, di relay 30. The information channel 5, the communication path switch 37, and the audio/data transmitting section 38 are connected to each other. Therefore, when the other party responds, the polarity of the outside line is reversed, and this is detected by the polarity reversal detection section 32. This detection signal is sent to the CPU 33
is transmitted on control channel 6 via communication interface 33 under the control of . The detection signal on this control channel 6 is sent to the CPU via the communication interface 39.
40 will be informed. As a result, the CPU 40
The data sending unit 38 is activated and a report is sent to the outside line.

Next, a case where the standalone telephone 50 is used will be explained.

When using a standalone telephone 50, use the SLT adapter 46
From then on, the polarity reversal detector command is not sent out on the control channel 6. Therefore, in the main device 29, the CPU 35
Since there is no polarity reversal detector command, relay coil 3
4 is not driven, the relay contact 31 remains closed. As a result, outside line L1 relay 31, cli relay 30.
A loop is formed by the information channel 5, the telephone relay 47, and the independent telephone 50. Therefore, there is no DC resistance between the outside line and the standalone telephone 50, and the DC resistance value seen from the outside line is only for the standalone telephone 50.

Note that when the home bus telephone 41 is used, the operation is the same as that of the stand-alone telephone 50 because polarity reversal is not normally required. Therefore, outside line L1 relay 31, di relay 30. A loop is formed by the information channel 5, the communication path switch 42, and the communication section 43.

As described above, in this embodiment, when a device that requires polarity reversal, such as an automatic notification device, is operating, the polarity reversal detection section of the main device is activated, and a stand-alone telephone or home bus system telephone is activated. When the polarity reversal detection section is used, the polarity reversal detection section can be bypassed to prevent a resistor from being connected in series.

Effects of the Invention As is clear from the above embodiments, the present invention provides a polarity reversal detection section in the main device of the home bus system and also provides a means for bypassing the polarity reversal detection section, so that polarity reversal detection can be performed at one location. In addition, when it is not related to polarity reversal of a stand-alone telephone, etc., the bypass means can be used to bypass the circuit, thereby preventing a resistor from being connected in series. Therefore, the present invention is effective in cases where the DC resistance value has already been determined,
Home bus telephones also have the advantage of being able to be designed with a margin for DC resistance.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the home bus system of the present invention, and FIGS. 2 and 3 are block diagrams showing conventional home bus systems. 5... Information channel, 6... Control channel, 2
9... Main device, 31... Contact (bypass means), 3
2... Polarity reversal detection unit, 34... Relay coil (bypass means), 36... Automatic notification device, 41... Telephone, 46... 5LTP adapter, 50... Independent telephone. Name of agent: Patent attorney Akira Okaji Two idiots Figure 2 Figure 3

Claims (1)

[Scope of Claims] A home bus system comprising: a main device that connects a home bus including a control channel and an information channel to an outside line; and a terminal connected to the home bus; a polarity reversal detection section that detects a response from the other party by detecting a polarity reversal of the terminal; a bypass means that bypasses the polarity reversal detection section; and a polarity reversal detection section that bypasses the polarity reversal detection section; A home bath system comprising: a control means for operating a home bath system;