JP2001257802A - Isdn wiring system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ISDN wiring system which decreases the number of cores and extends a communication distance by transferring a U-point interface as the interface of an outdoor line between a plurality of terminal adapters. SOLUTION: A 1st terminal adapter 41 connected to the U-point interface of an ISDN line has an S/T-point interface to which the U-point interface of the ISDN line is connected and a U-point interface which transfers the U-point interface of the ISDN line and a 2nd terminal adapter 49 connected to the U-point interface of the 1st terminal adapter 41 has an S/T-point interface to which the U-point interface is converted and a U-point interface transferring the U-point interface; and the 1st terminal adapter 41 and 2nd terminal adapter 49 are wired by the two-core conductor of the U-point interface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an ISDN, which is being rapidly introduced as a social infrastructure of a communication network.
(Integrated Services Digi
The present invention relates to an ISDN wiring system such as an indoor wiring or a premises wiring of a tal network, and more particularly to an ISDN wiring system used as a home wiring system using one circuit or a long-distance wiring system in a premises.

[0002]

2. Description of the Related Art FIG. 6 is an explanatory diagram showing an example of a conventional ISDN wiring system. The U-point interface of the ISDN line is composed of two core wires (2W), and the terminal adapter (TA) 14 of the office building 12 provided on the premises 11 on the same premises such as a large premises or a farm DSU (Digital)
Service Unit) 13 and the DSU
Reference numeral 13 converts a 2-core U point interface into a 4-core (4W) S / T point interface. The terminal adapter 14 is on the same premises, a separate building 1 provided on the premises 11.
5 terminal adapter (TA) 16 with 4-core S / T
Connected by point interface. The terminal adapter 14 has two two-core analog ports 17,1.
An 8 / 4-core S / T point port 19 is provided, an analog port 17 is connected to an analog telephone (TEL) 20, and an analog port 18 is an analog telephone / G3.
A facsimile (FAX) 21 is connected, and a personal computer (PC) 22 is connected to the S / T point port 19. The terminal adapter 16 is provided with two 2-core analog ports 23 and 24 and a 4-core S / T point port 25, and the analog port 22 includes an analog telephone (TE).
L) 26, an analog telephone 24 / G3 facsimile (FAX) 27 is connected to the analog port 24,
A personal computer (PC) 28 is connected to the S / T point port 25.

FIG. 7 is an explanatory diagram showing another example of a conventional ISDN wiring system. This example is wiring in a home, and the U point interface of the ISDN line via the protector or the wiring board 31 is converted into the S / T point interface (4W) and the analog interface (2W × 2) by the switchboard 32. Eight-core (8W) wiring is provided around the living / dining room such as the rooms 1 to 3, the kitchen, the bathroom and the washroom. The rooms 1 and 2 are connected to telephones / faxes 33 and 34, and the living / dining room is connected to telephones / faxes 35 and a terminal adapter for ISDN (T
A) A personal computer (PC) 37 is connected via 36.

In the conventional ISDN wiring system, the connection between the terminal adapter 14 and the terminal adapter 16 is
Since the S / T point interface of the core wire is used, the possible wiring distance A between the communication devices from the first terminal adapter 14 to the last terminal adapter 16 cannot exceed 150 m. Therefore, in large premises, etc., 8
The ISDN line that can be connected to the terminal could not be used effectively. Moreover, it is necessary to lay a 4-core cable for the S / T point interface.

[0005] A plurality of communication devices can be connected to the ISDN line. The wiring distance from the DSU is 150 m for short-distance bus wiring when the distance between communication devices exceeds 50 m, and extended bus wiring when the distance between communication devices is 50 m or less. 550 m, so in a large campus, a plurality of lines are drawn even if it is not necessary from the viewpoint of traffic. In addition, it is originally a bus wiring, and is in a form in which a line can be established from the DSU in the manner of writing with a brush. However, depending on the position of the DSU which is the base point of the indoor wiring, it is possible to take measures such as taking back wiring form, taking measures such as wiring that mixes digital interface line and analog interface line, wiring with mixed wireless interface, etc. Or deal with it.

[0006]

When an ISDN line is used on a large site, in a factory, in a warehouse, or on a farm, the wiring distance between ISDN communication devices is at most 150.
m, so even if there is not much traffic,
The ISDN line could not be used effectively, such as by pulling a line separately.

Further, since an interface such as RS232C cannot be extended too much, a terminal adapter for ISDN having the interface is installed near a personal computer. At home, study and study rooms are common. On the other hand, since telephones and the like are installed in a living room or a bedroom, a line once drawn into the study is distributed to each room from there. Therefore, the wiring inside the pipe runs from the outdoor to the study, and the PST from that to each room
N (Public Switched Telepho
ne Network) line will run indoors.

As a method for solving this problem, there has been proposed a method of clearing the wiring by mixing a digital interface line and an analog interface line.
Eight-core wiring is required, leaving problems in terms of both construction and cost. Further, this method does not solve the problem of extending the wiring distance.

The present invention has been made in view of the above circumstances, and reduces the number of core wires and extends the communication distance by transferring a U point interface which is an interface of an outdoor line between a plurality of terminal adapters. An object of the present invention is to provide an ISDN wiring system.

[0010]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention relates to a subscriber line side ISDN wiring system which connects to an ISDN line and performs communication, the terminal being connected to a U point interface of the ISDN line. The adapter is an S / N interface converted from the U point interface of the ISDN line.
It has a U-point interface for transferring a T-point interface and a U-point interface of an ISDN line, and is characterized in that a plurality of terminal adapters are wired with a two-core wire of the U-point interface.

Further, the present invention is characterized in that the terminal adapter is provided with an R-point interface in the ISDN wiring system.

Further, according to the present invention, in the above-mentioned ISDN wiring system, the terminal adapter has a function of detecting a destination address or a destination sub-address. The incoming or outgoing signal is not output to the U point interface.

Further, according to the present invention, in the ISDN wiring system, the terminal adapter has a function of detecting a calling address or a calling sub-address. The transmission or reception signal is not output to the U point interface.

Further, according to the present invention, in the ISDN wiring system, the terminal adapter has a function of detecting an incoming / outgoing address or an outgoing / incoming sub-address. The transmission signal is not output to the interface, but is received at the S / T point or the R point of the terminal adapter of the corresponding destination address or destination subaddress.

According to the present invention, a plurality of terminal adapters are wired with a U point interface, thereby eliminating the wiring distance limitation of the S / T point interface and reducing the number of core wires.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a structural explanatory view showing an embodiment of the present invention. That is, the U point interface (2W) of the ISDN line is connected to the DSU / OCU (Office Channel) of the first terminal adapter 41 on the subscriber line side.
l Unit) 42 DSUs, and this DSU
Converts the U point interface (2W) to the S / T point interface (4W) and is connected to the S / T point port 43. The U point interface (2W)
The port is connected to the analog ports 45 and 46 by analog conversion 44, and the data communication port (for example, USB, 23
2C etc.) 48. The OCU of the DSU / OCU 42 converts the S / T point interface (4W) converted by the DSU into a U point interface (2W) and amplifies it. By the U point interface (2W) converted and amplified by the OCU of the DSU / OCU 42, the OCU of the DSU / OCU 42 is connected to the DSU of the DSU / OCU 50 of the second terminal adapter 49, and this DSU is connected to the U point interface. (2W) is converted to an S / T point interface (4W) and connected to the S / T point port 51, and the U point interface (2W) is subjected to digital / analog conversion 52 to analog ports 53 and 54.
The U-point interface (2W) is speed-converted 55 by a data communication port (for example, USB,
232C etc.) 56. The DSU / OCU5
The OCU of 0 converts and amplifies the S / T point interface (4W) converted by the DSU to the U point interface (2W). By the U point interface (2W) converted by the OCU of the DSU / OCU 50, the D
The OCU of the SU / OCU 50 is connected to the DSU of the DSU / OCU 58 of the third terminal adapter 57.
The SU converts the U-point interface (2W) to the S / T-point interface (4W) and is connected to the S / T-point port 59. The SU converts the U-point interface (2W) to digital / analog conversion 60 and performs analog conversion. Ports 61 and 62, and further converts the U-point interface (2W) by speed conversion 63 or the like to a data communication port (for example, USB, 2W).
32C). The DSU / OCU 58
OCU converts the S / T point interface (4W) converted by the DSU into the U point interface (2W) and amplifies it.

U on the station side of the first terminal adapter 41
When an incoming call is received at a point, the terminal adapter 41 transmits the incoming call to the ISDN device connected thereto via the S / T point interface by the DSU function provided therein. At the same time, the signal from the U-point interface of the upper terminal adapter 41 is transferred via the U-point interface toward the lower terminal adapter 49. The DSU of the lower terminal adapter 49 converts the DSU into an S / T point and transmits an incoming call. If a similar terminal adapter is arranged here, the U point signal from the upper part can be further transferred to the DSU of the lower terminal adapter 57. By performing the transfer at the point U in this manner, the number of core wires of the cable becomes two, and the routable distance B
Can be extended by several kilometers.

Here, the terminal adapter and the lower DS
The departments where U (including terminal adapters) are installed are completely different, and it is necessary to distinguish each incoming call. In that case, it should be distinguished by the destination address,
The terminal adapter can deal with this by checking the address and determining whether to notify the S / T point of the incoming call or to forward the signal to the U point. In addition, if the ISDN device connected to the terminal adapter is used for a special purpose, even if the destination address is the same, it can be dealt with by knowing the incoming call by looking at the sub address.

It is to be noted that the transmission is preempted from either the upper terminal adapter or the lower terminal adapter. The terminal adapter of this example is S
In addition to the / T point, an R port interface port such as an analog port or a data communication port is provided.

FIG. 2 is a structural explanatory view showing another embodiment of the present invention. That is, the U point interface of the ISDN line is composed of two core wires (2W), and is connected to the DSU 74 of the terminal adapter 73 of the office building 72 provided on the premises 71 on the same premises such as a large premises or a farm.
Converts the U point interface (2W) to the S / T point interface (4W), and connects to a personal computer (PC) 76 via the S / T point port 75. In addition, the DSU7
Reference numeral 4 denotes a U point interface (2W) which is connected to TEL / FAXs 78 and 79 via two analog ports (2W) 77 via digital / analog conversion or the like. The OCU 80 of the terminal adapter 73 converts and amplifies the S / T point interface (4W) converted by the DSU 74 to the U point interface (2W). The OCU 80 of the terminal adapter 73 and the DSU 82 of the terminal adapter 81 in another building are connected by the U point interface (2W) converted by the OCU 80, and the DSU 82 changes the U point interface (2W) to the S / T point interface (4W).
To the PC (P / P) via the S / T point port 83.
C) 84 is connected. Further, the DSU 82 converts the U point interface (2W) into a TEL through two analog ports (2W) 85 through digital / analog conversion or the like.
/ FAX86,87. The OCU 88 of the terminal adapter 81 is the S / T converted by the DSU 82
Point interface (4W) to U point interface (2
W) and amplify. The OCU 88 of the terminal adapter 81 and the terminal adapter 89 of the new building are connected by the U point interface (2W) converted by the OCU 88.

In the present invention, the signal at point U is returned to the signal at point U again.
The distance B between the terminal adapter 81 and the DSU 82 of the separate building can be extended up to several kilometers, and the wiring is 2W.
Cable can be used.

FIG. 3 is a structural explanatory view showing another different embodiment of the present invention. That is, this example is wiring in a home, and wiring of a U point interface (2W) of an ISDN line via a protector or a wiring board 91 is used in rooms 1 to 3, kitchens, bathrooms / washrooms, and living / dining rooms. Provided around. Telephone / F in room 1 and room 2
AXs 92 and 93 are connected, and a telephone / FAX 94 and a PC 95 are connected to the living / dining room.

By using the present invention, 2 W wiring can be used.

FIG. 4 is an explanatory diagram showing an example relating to the use of the present invention. In the drawings, the same portions are denoted by the same reference numerals and description thereof will be omitted. In other words, by looking at the information elements included in the call setting message of the telephone, such as the address / subaddress and the transmission capability, it controls whether the information is to be transferred to the lower terminal adapter or to which terminal adapter to receive the call.

This example is based on the premise that the distance between the terminal adapters is long. If the user rings the bell without knowing the destination of the call, and goes off-hook in a place other than the intended place, he will be troubled by the subsequent transfer. . Here, a different telephone number is given to each terminal adapter, and each terminal adapter takes in its own address if it is its own destination address, and takes over the signal to the next terminal adapter otherwise. Of course, instead of using a plurality of telephone numbers, it is also possible to identify an incoming call using a subaddress.

FIG. 5 is an explanatory diagram showing another example of the use of the present invention. In the drawings, the same portions are denoted by the same reference numerals and description thereof will be omitted. In other words, by looking at the information elements included in the telephone call setup message, such as the address / subaddress and the transmission capability, it controls whether the information is to be delivered to the upper (network) side or through which network.

The terminal adapter detects a calling number from a communication device under the terminal adapter, and usually transfers a signal to an upper terminal adapter. When the transmission number is recognized as belonging to the lower terminal adapter registered in advance, this signal is transferred to the lower terminal adapter or DSU. On the other hand, each terminal adapter has a function of recognizing a calling number and, when recognizing an incoming call to a subordinate communication device, terminating there and not transferring it to a destination. Therefore, communication between extensions is also possible.

[0029] Naturally, the terminal adapter at the top can recognize the transmission number, and convert or add information for selecting a network or a network operator, and transmit the information.

As described above, by further extending the interval between communication devices that can be connected to one ISDN line,
It can improve traffic per line, reduce the burden on users, and increase the efficiency of social infrastructure. In addition, indoor relaying over long distances becomes possible with the minimum number of core wires, and the ISDN line will further expand its application field.

[0031]

As described above, according to the present invention, the ISDN which reduces the number of core wires and extends the communication distance by transferring the U point interface which is the interface of the outdoor line between a plurality of terminal adapters. A wiring system can be provided.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory diagram showing an embodiment of the present invention.

FIG. 2 is a configuration explanatory view showing another embodiment of the present invention.

FIG. 3 is a configuration explanatory view showing another different embodiment of the present invention.

FIG. 4 is an explanatory diagram showing an example regarding the use of the present invention.

FIG. 5 is an explanatory diagram showing another example of use of the present invention.

FIG. 6 is a configuration explanatory view showing an example of a conventional ISDN wiring system.

FIG. 7 is a configuration explanatory view showing another example of the conventional ISDN wiring system.

[Explanation of symbols]

 41 First terminal adapter 42,50,58 DSU / OCU 43,51,59 S / T point port 44,52,60 Digital / analog conversion 45,46,53,54,61,62 Analog port 47,55 , 63 Speed conversion, etc. 48, 56, 64 Data communication port 49 Second terminal adapter 57 Third terminal adapter 73 Office building terminal adapter 81 Separate building terminal adapter 89 New building terminal adapter

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 5K030 GA19 HA01 HC04 JT01 MA05 MA09 MD09 MD10 5K034 AA12 EE13 FF11 GG04 KK04 KK12 5K101 LL03 MM06 PP03 9A001 CC04

Claims (5)

[Claims] 1. In a subscriber line side ISDN wiring system for performing communication by connecting to an ISDN line, a terminal adapter connected to a U point interface of the ISDN line is a terminal adapter converted from a U point interface of the ISDN line.
An ISDN wiring system having a U-point interface for transferring a / T-point interface and a U-point interface of an ISDN line, and wiring between a plurality of terminal adapters with a two-core wire of the U-point interface. 2. The ISDN wiring system according to claim 1, wherein an R point interface is provided in the terminal adapter. 3. The terminal adapter has a function of detecting a destination address or a destination sub-address, and when a call is received or transmitted to a destination address or a destination sub-address registered in advance, the received or transmitted signal is transmitted to a U point interface. 3. The ISDN wiring system according to claim 1, wherein the signal is not output. 4. A terminal adapter having a function of detecting a calling address or a calling sub-address, and for a call or a call from a calling address or a calling sub-address registered in advance, the calling or called signal is transmitted to a U point interface. 3. The ISDN wiring system according to claim 1, wherein the signal is not output. 5. The terminal adapter has a function of detecting an incoming / outgoing address or an outgoing / incoming sub-address, and does not output the outgoing signal to the U-point interface for an outgoing call from an incoming / outgoing address or outgoing / incoming sub-address registered in advance. 3. The ISDN wiring system according to claim 2, wherein an incoming call is made to an S / T point or an R point of a terminal adapter having a corresponding destination address or destination sub-address.