JP2001044989A - Terminating device for digital circuit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To use an existing analog terminal even when an analog circuit is changed to an integrated service digital network(ISDN) circuit by providing plural analog circuit interfaces. SOLUTION: This terminating device can be incorporated into a switch box and has the interfaces of U and S/T points of an ISDN circuit. Then a modular jack is connected to the interface of the S/T point of the ISDN circuit on the upper surface of the device, and a U point immediate decision terminal 3 and an S/T point immediate decision terminal 4 are connected to the U point of the ISDN circuit and a subscriber's ISDN terminal device respectively on the rear surface of the device. Then the terminating device is attached to an attachment frame 5, and the frame 5 fixed to a box buried in a wall surface, etc., by screws through the attachment holes. Finally, a decorative cover is put over the front face of the frame 5. Thus, the terminating device can be buried in the wall surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an ISDN (Int)
Egrated Services Digital
A digital line terminating device that serves as a demarcation point between a subscriber side and a network side in a Network line, provides a basic interface to the subscriber side, and performs transmission with the network side by a two-wire time division transmission system (ping-pong transmission). (DSU: Dig
ital Service Unit).

[0002]

2. Description of the Related Art Conventionally, various DSUs for performing digital transmission by connecting to an ISDN line are commercially available. FIG. 7 shows an example of a wiring configuration of the conventional DSU 13. Conventionally, the DSU is built in the wall or in the house information panel 14, so in an existing house, the analog line is used for ISDN.
When changing to a line, it is not easy to attach a DSU, and the wiring from the DSU to each modular outlet is
It was necessary to change all the 6 cores of analog to 8 cores of S / T interface.

In the conventional DSU, when analog equipment such as a telephone is connected to an ISDN line, it is necessary to connect the terminal to an ISDN line via a terminal adapter (TA) 15. Further, only one analog device can be connected to each analog port of the TA.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the following:
An excellent digital system that simplifies wiring work when joining an ISDN line, makes it easy to change from an analog line to an ISDN line in an existing house, and enables analog equipment to be connected to the ISDN line without using a TA. A line termination device is provided.

[0005]

According to the first aspect of the present invention, a modular jack having a plug insertion opening on the outer surface of a body into which a modular plug is removably inserted;
A terminal for connecting to the DN line and a terminal for connecting to the in-house ISDN terminal device are provided.
Point and S / T point interfaces.

According to a second aspect of the present invention, in the first aspect of the present invention, a single modular jack having a plug insertion opening into which a modular plug is removably inserted is provided on the surface of the body. The one modular jack has S
The / T point is connected, and a terminal connected to the ISDN line and a terminal connected to the ISDN terminal device in the house are provided on the back of the body.

According to a third aspect of the present invention, in the first aspect of the present invention, a plurality of modular jacks having a plug insertion opening into which a modular plug is removably inserted are provided on the body surface, An S / T point and an analog line are connected to the plurality of modular jacks, and an interface of U and S / T points of an ISDN line and an interface of an analog line are provided inside the housing. A terminal connected to the ISDN line, a terminal connected to the ISDN terminal device in the house, and a terminal connected to the analog terminal device are provided on the back surface.

According to a fourth aspect of the present invention, in the first to third aspects of the present invention, the body is a standardized wiring device for mounting a standardized wiring device. It has a mounting portion that can be mounted on the mounting frame, and is formed in a size corresponding to two standardized wiring devices.

According to a fifth aspect of the present invention, in the fourth aspect of the present invention, the vessel and the mounting frame for the wiring device are integrally formed. is there.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of a digital line terminal according to the present invention will be described with reference to FIGS.
The second embodiment will be described in detail with reference to FIGS.

[First Embodiment] A digital line terminal according to the present embodiment will be described below.

As shown in the three-dimensional exploded perspective views of FIGS.
It has interfaces (not shown) at the U point and S / T point of the DN line. The surface of the vessel 1 has S
A modular jack 2 connected to an interface at a / T point is provided. On the back side, a U point prompt decision terminal 3 connected to a U point of an ISDN line and an S / S terminal connected to an ISDN terminal device at home as shown in FIG. It has a T-point prompt decision terminal 4.

By the way, the digital line termination device is shown in FIG.
As shown in FIG. 5, a mounting frame 60 made of synthetic resin can be used to embed in a wall or the like. The mounting frame 5 is used when a standardized, double-sized wiring device is buried in a wall or the like. In this embodiment, the upper part of the cover (not shown) bulges in a shape in which the central part in the end direction is exposed from the opening of the mounting frame 5 so that the body 1 is attached to the mounting frame 5, and the both edges are lowered by one step. Two sets of locking pieces (not shown) are protrudingly provided sideways from the side. That is,
The locking piece at one end is inserted into an insertion hole (not shown) of the mounting frame 5, and the locking piece at the other end is inserted into the locking hole (not shown) by utilizing the flexibility of the mounting frame 5. The digital line termination device is attached to the attachment frame 5 by locking. The mounting frame 5 includes a release piece 65 for releasing the locking piece from the locking hole.
Removably attached to. Also, a pair of fitting holes (not shown) are formed at the base end portions at both ends of the central portion swelled above the cover, and the digital line termination device can be mounted on the wall surface even if a metal mounting frame is used. And so on.

The digital line terminal is mounted on a wall or the like as follows. First, the digital line terminator is mounted on the mounting frame 5 as described above, and then the mounting frame 5 is screwed and fixed to an embedding box buried in a wall or the like through a mounting hole. If the decorative cover 6 is attached to the front, the digital line terminating device is embedded in a wall or the like. In the present embodiment, the case where the body 1 and the mounting frame 5 are separated from each other has been described. However, the same effect can be obtained even if they are integrated.

Thus, as shown in FIG.
It can be stored in the individual switch box,
Further, since the terminal up to the U-point prompt decision terminal 3 of the present apparatus is the U-point of the ISDN line, it is connected by a 6-core cable 9 like the analog line.

The modular jack 2 connected to the interface of the ISDN S / T point is for connecting a router (not shown) in which the number of connectable units is set to one. Can be easily constructed, and an ISDN terminal such as a G4 fax including TA can be directly connected by using the modular plug 8. The number of S / T point prompt decision terminals 4 to be connected to the in-home ISDN terminal device is set to seven including the number of connectable units including the connection to the modular jack 2 connected to the interface of the ISDN S / T point. An ISDN bus wiring, electrically connected to a preceding bus wiring to the ISDN modular jack in an outlet having an 8-pole 8-core ISDN modular jack and a 6-pole 2-core analog telephone line modular jack; Connected to an ISDN terminal via a modular jack for communication, and directly to an ISDN terminal.

Thus, in an existing house, when changing from an analog line to an ISDN line, the IS
The wiring up to the U-point prompt decision terminal 3 connected to the U-point of the DN line can be used as it is, so that the wiring work can be simplified. However, the S / T quick connection terminal 4 on the back side of the device shown in FIG.
As for the / T bus wiring, since the 8-core cable 10 is used, the cable needs to be changed.

[Second Embodiment] As shown in the three-dimensional exploded perspective views of FIGS. 4 and 5, the present apparatus can be built in a switch box 7, and the U point, S / T point, and analog line of ISDN are used. Interface (both not shown). A modular jack 2 connected to the interface of the ISDN S / T point and a modular jack 11 connected to the interface of the analog line are provided on the surface of the body 1.
And a U-point prompt terminal 3 connected to the U-point of the ISDN line, an S / T point prompt terminal 4 connected to the in-home ISDN terminal device as shown in FIG. And an analog TEL prompt decision terminal 12 connected to the terminal.

By having an analog line interface, the present device can connect analog equipment by internal digital / analog conversion in addition to the function of the conventional DSU.
r) It has a function.

Since the body 1 has the same structure as that of the above-described first embodiment, it is possible to store this apparatus in a two-switch box as shown in FIG. Becomes Also, up to the U-point prompt decision terminal 3 of this device is IS
Since it is the U point of the DN line, it is connected by the 6-core cable 9 like the analog line. Further, when an analog telephone is connected to a modular outlet other than the present apparatus, a 6-core cable 9 may be used as a cable to be relayed from the analog TEL quick connection terminal 12 on the rear side of the present apparatus shown in FIG.

Modular jack 11 for analog TEL
Is directly connected to analog equipment such as a telephone, a fax machine and a modem, and an analog TEL prompt terminal 12 provided on the back side is electrically connected to a preceding wiring to a modular jack for an analog telephone line at another outlet. ,
It is connected to analog equipment via the analog telephone line modular jack.

For this reason, when changing from an analog line to an ISDN line in an existing house, the wiring up to the modular outlet built into the device and the part using the analog line can be used as it is, simplifying the wiring work. Can be However, as shown in FIG.
S / T from / T immediate connection terminal 4 to another modular outlet
As for the bus wiring, since the 8-core cable 10 is used, the cable needs to be changed.

In this embodiment, an example of a digital line termination device having one analog line interface has been described. However, there may be a case where a plurality of analog line interfaces are provided. For example, if the analog port is 2
If ports are provided, wiring can be performed independently for two systems, and the degree of freedom of preceding wiring is increased.

As described above, it becomes possible to connect an analog device to an ISDN line without using a TA.

[0025]

As described above, according to the first to third aspects of the present invention, since a plurality of analog line interfaces are provided, an existing analog terminal can be used even when an analog line is changed to an ISDN line. It has the effect of being able to do it.

According to the fourth and fifth aspects of the present invention, the dimensions of the housing are formed to be the module dimensions of a ready-made embedded wiring device, and the housing is used for embedding a ready-made embedded wiring device. By making it detachable from the mounting frame, there is an effect that the embedding work can be easily performed in the same manner as the existing embedded wiring device.

[Brief description of the drawings]

FIG. 1 is a first diagram of a digital line termination device according to the present invention.
It is the three-dimensional disassembled perspective view seen from the front side of embodiment.

FIG. 2 is a three-dimensional exploded perspective view of the digital line termination device as viewed from the back side.

FIG. 3 is a diagram illustrating an example of a wiring configuration.

FIG. 4 shows a second example of the digital line terminal according to the present invention.
It is the three-dimensional disassembled perspective view seen from the front side of embodiment.

FIG. 5 is a three-dimensional exploded perspective view of the digital line termination device as viewed from the back side.

FIG. 6 is a diagram illustrating an example of a wiring configuration.

FIG. 7 is a diagram showing an example of a wiring configuration of a DSU in a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 S / T point modular jack 3 U point prompt decision terminal 4 S / T point prompt decision terminal 5 Mounting frame 6 Makeup cover 7 Switch box 11 Analog TEL modular jack 12 Analog TEL prompt decision terminal

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[Procedure amendment]

[Submission date] August 9, 2000 (200.8.9)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0003

[Correction method] Change

[Correction contents]

In the conventional DSU, when analog equipment such as a telephone is connected to an ISDN line, it is necessary to connect the terminal to an ISDN line via a terminal adapter (TA) 15.

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Koji Ikeda 1048 Kazumasa Kadoma, Osaka Pref. Matsushita Electric Works, Ltd. Terms (reference) 5K027 AA10 BB01 CC02 KK03 KK07 5K030 GA05 GA08 HC05 JA08 JL08 KA14 5K046 AA01 CC05 5K101 LL03 MM04 9A001 BB06 CC04

Claims (5)

[Claims] 1. A modular jack having a plug insertion port into which a modular plug is removably inserted, a terminal connected to an ISDN line, and an in-house ISDN.
A terminal for connecting to a terminal device is provided.
A digital line termination device comprising an interface of a line U point and an S / T point. 2. A modular jack having a plug insertion opening into which a modular plug is removably inserted, wherein the modular jack has an S / T.
2. The digital line termination device according to claim 1, wherein points are connected, and a terminal connected to an ISDN line and a terminal connected to an in-house ISDN terminal device are provided on a rear surface of the body. 3. A plurality of modular jacks having a plug insertion slot into which a modular plug is removably inserted, and a plurality of modular jacks are provided on the plurality of modular jacks.
A / T point and an analog line are connected, and an interface at the U and S / T points of the ISDN line and an analog line interface are provided inside the housing, and the ISDN line is connected to the back of the housing. 2. The digital line terminal according to claim 1, further comprising a terminal connected to the terminal, a terminal connected to the ISDN terminal in the house, and a terminal connected to the analog terminal. 4. The standard body according to claim 1, wherein the body has a mounting portion that can be mounted on a mounting frame for a wiring device that is standardized so that a standardized wiring device can be mounted. 4. The apparatus according to claim 1, wherein said apparatus is formed in a size corresponding to two instruments.
Digital line termination device as described 5. The digital line termination device according to claim 4, wherein said body and a mounting frame for said wiring device are integrally formed.