JP3278596B2 - Line / plug discriminator for modular jack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal device in a wired service network, and more particularly to a terminal device in a terminal device of a wired service network employing different connection terminal structures and different protocols.

[0002]

2. Description of the Related Art In a conventional wired service, terminal devices employing different protocols are provided with dedicated connection terminal structures, for example, modular jacks. FIG. 3 illustrates the concept.

For example, different protocols PR1 and PR
2 and PR3, the terminal devices 21A and 21A connected to the wired service network NW and adopting each protocol.
For B and 21C, different modular jacks, for example, ETERNET jack 20A, public line 2-wire jack 20B, public line 4-wire jack 20
C is provided exclusively for each. This is because if a unique modular jack is set in accordance with the type of protocol in the terminal device, the terminal device 100A connected to the terminal device and used can be connected to the corresponding modular plug 2.
This is to ensure that the connection to 01A allows the user to receive a wired service according to the set protocol.

[0004]

The above-mentioned prior art has the following problems.

[0005] The first problem is that the modular plug of the wired service network of the protocol PR1 is connected to a different protocol PR2.
Is to destroy the terminal device when connected to the modular jack. The reason is that when an analog line terminal device is connected to a digital line, excess current flows. In addition, a digital network and an analog network are generally mixed, but one of the reasons is that they cannot be visually distinguished.

A second problem is that when a terminal device used in Japan is used outside of Japan, the terminal is destroyed. The reason for this is that the connection method is different in spite of being the same type of modular jack built into the terminal device used in Japan.

SUMMARY OF THE INVENTION An object of the present invention is to provide a modular jack which can automatically support different protocols and different modular plug / jack structures and receive a wired service without breaking the terminal device itself with one terminal device. To provide a line / plug discriminator.

[0008]

SUMMARY OF THE INVENTION A plug / line discriminator for a modular jack according to the present invention comprises current value detecting means for detecting a current value flowing through each connection pin of a modular jack connected to a line, The modular jack is connected by comparing the data, the memory storing the specifications of the connection pins of the existing plug, and the value of the current flowing through each connection pin and / or its change with the data of the line stored in the memory. Determine whether the line is a digital line or an analog line,
Further, the type of the modular plug is determined by comparing the current value and / or its change with the specification of the connection pin of the existing plug stored in the memory, and an I / F protocol corresponding to the determined line and the modular plug is determined. And a line / plug discriminating means for starting communication at

According to an embodiment of the present invention, the line / plug discriminator for the modular jack has voltage value detecting means for detecting the voltage value of each connection pin of the modular jack, instead of the current value detecting means. The line / plug determining means determines the type of the line to which the modular jack is connected and the type of the modular plug from the voltage value and / or its change.

When the modular jack is connected to the line,
The line type and plug type are automatically detected from the current value (or its change) flowing through the connection pin of the modular jack or the voltage value (or its change) of the connection pin of the modular jack, and the I value corresponding to those is detected. Communication starts with the / F protocol.

[0011]

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

FIG. 1 shows a line / plug discriminator for a modular jack according to an embodiment of the present invention, which comprises a current detecting section 12, a memory 14, and a CPU 15.
Constitutes the control unit 16.

The current detector 12 detects a current flowing through each connection pin of the modular jack 11. The memory 14 stores data (current patterns) of existing lines and specifications of pins of existing plugs. The CPU 15 controls the current detection unit 1
2 is compared with the data of the existing line stored in the memory 13 to determine whether the line to which the modular jack 11 is connected is a digital line or an analog line. Further, the CPU 15 is provided with the current detecting unit 1.
The specification of each pin of the connected plug is determined from the current value of each connection pin notified from 2. For example, in the case of a four-wire system, it is determined that the X1 pin is a power line, the X2 pin is a GND line, and the X3 and X4 pins are data lines. Further, the specification result of each pin is compared with the specification of the connection pin of the existing plug stored in the memory 14, and the type of the connected plug is determined. Further, the CPU 15 starts communication using the I / F protocol corresponding to the determined line type and the connected plug.

The type of the line and the type of the plug may be determined only from the change in the current value or from the current value and the change.

Referring to FIG. 2, a line / plug discriminator for a modular jack according to another embodiment of the present invention uses a voltage value of each connection pin of modular jack 11 instead of current detecting section 12 in FIG. The CPU 15 has a voltage detection unit 13 for detecting the voltage value and / or a change in the voltage value notified from the voltage detection unit 13. The line to which the modular jack 11 is connected in the same manner as in the embodiment of FIG. And the type of the connected plug are determined.

[0016]

As described above, according to the present invention, it is possible to determine whether the line to which the modular jack is connected is a digital line or an analog line, thereby connecting the modular plug of the wired service network of the protocol PR1 to a different protocol PR2.
When connected to a modular jack, the terminal device is not destroyed, and the modular jack itself determines the plug type and automatically uses the connection method corresponding to the connected modular plug, so it is used in Japan If the used terminal device is used abroad, there is an effect that the terminal is not destroyed.

[Brief description of the drawings]

FIG. 1 is a block diagram of a modular jack line / plug discriminator according to an embodiment of the present invention.

FIG. 2 is a block diagram of a modular jack line / plug discriminator according to another embodiment of the present invention.

FIG. 3 is a schematic diagram of a wired service network.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Modular jack 12 Current detection part 13 Voltage detection part 14 Memory 15 CPU 16 Control part 21A, 21B, 21C Terminal equipment 22A Jack for ETHERNET 22B Modular jack for public line 2 wires 22C Modular jack for public line 4 wires 100A Terminal equipment 201A Modular plug

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-60-64592 (JP, A) JP-A-8-46719 (JP, A) JP-A-8-125733 (JP, A) 50954 (JP, U) Shokai Sho 62-103348 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) G01R 31/02 H04M 1/24

Claims (2)

(57) [Claims] 1. A current value detecting means for detecting a current value flowing through each connection pin of a modular jack connected to a line, a memory storing data of an existing line and specifications of a connection pin of an existing plug. Comparing the current value flowing through each connection pin and / or its change with the data of the line stored in the memory to determine whether the line to which the modular jack is connected is a digital line or an analog line; The current value and / or
Alternatively, the type of the modular plug is determined by comparing the change with the specification of the connection pin of the existing plug stored in the memory, and communication is started by the I / F protocol corresponding to the determined line and modular plug. Line / plug discriminator for modular jacks having a line / plug discriminating means. 2. A voltage value detecting means for detecting a voltage value of each connection pin of the modular jack in place of the current value detecting means, wherein the line / plug discriminating means comprises a voltage value and / or a change thereof. 2. The modular jack line / plug discriminator according to claim 1, wherein the type of the line to which the modular jack is connected and the type of the modular plug are determined.