JPS62271549A - Switching system for digital subscriber - Google Patents

Abstract

PURPOSE:To supply a subscriber a service by an analogue telephone set by connecting the analogue telephone set in the subscriber's house to an analogue interface subscriber converter when a fault occurs in a mesh terminal equipment or an ISD subscriber converter. CONSTITUTION:When the fault occurs in the mesh terminal equipment 7, a subscriber's private side switching controller 8 controls a subscriber's private side switching unit 5, and connects a two-wire subscriber line 9 to the analogue telephone set 6. Then, an office side switching controller 4 detects the fault of the ISD subscriber converter 3, controls an office side switching unit 1 and connects the subscriber line 9 to the analogue interface subscriber converter 2. As a result, the telephone set 6 and the converter 2 are connected through the subscriber line 9. When the fault occurs in the converter 3, the switching unit 1 is similarly switched, and so is the switching unit 5, whereby the telephone set 6 and the converter 2 are connected through the subscriber line 9. Thus, the service by the analogue telephone set can be supplied to the subscriber.

Description

Detailed Description of the Invention 3. Detailed Description of the Invention [Field of Industrial Application] The present invention relates to a switching system, and in particular to an ISDN (Int
5 services DjgjtaJ
The present invention relates to a switching system for digital subscriber lines in a digital integrated communication network (Digital Integrated Communication Network).

[Conventional technology]

FIG. 2 shows an example of a conventional subscriber line switching system.

Referring to FIG. 2, a subscriber line exchange 10 equipped with an analog subscriber line interface is a 211iI type subscriber line 1.
1 to the terminal 12'a of the in-house switching device 12. A terminal 12b of the in-house switching device 12 is connected to an analog telephone 13, and a terminal 12c is connected to a network control device 14. A fault detector 15 for detecting a fault in the network control device 14 is provided, and this fault detector 15 is connected to the network control device 14 and the home switching device 12.

By the way, when the in-home switching device 12 connects the two-wire subscriber line 11 to the network control device 14 (that is, when the terminals 12& and 12e of the in-home switching device 12 are connected),
When a fault occurs in the network control device 14, the fault detector 15 detects this fault. When the fault detector 15 detects a fault, it switches and controls the in-house switching device 12 to connect the two-wire subscriber line 11 to the analog telephone 13 (connecting the terminals 12a and 12b of the switching device 12). ).

As a result, even if a failure occurs in the network control device 14, the subscriber can receive service through the analog telephone 13.

[Problem that the invention seeks to solve]

In the case of the above-mentioned switching system, only the transmission of analog signals is considered in the 2a type subscriber line 11. In other words, when a digital signal is transmitted on a two-wire subscriber line ll (i.e., in the case of an ISDN system), the analog telephone 13 is connected to the two-wire subscriber line 11 by the premises switch 1.
There is a problem in that even if a subscriber connects via 2, he or she cannot receive the service.

The object of the present invention is to provide an ISDN system in which digital signals are transmitted over a two-wire subscriber line.

To provide a switching system capable of receiving service by an analog telephone even if the analog telephone is connected to a two-wire subscriber line in the event of a failure of a device inside the premises.

[Means for solving problems]

The switching system according to the present invention includes an in-house switching device connected to one end of a two-wire subscriber line, and a network termination device and an analog telephone connected to the in-premise switching device.

Connects to the in-house switching controller that detects faults in the network termination equipment and switches the in-premises switching device, and the station-side switch connected to the other end of the 2-wire subscriber line and the 1-station side switch. ISDN subscriber line exchange and analog interface subscriber line exchange, and a station side switching controller that detects failures in the ISDN subscriber line exchange and controls switching of the single station side switch.

The switching controller inside the premises switches between the network terminal equipment and the analog telephone, while the switching controller at the single station switches between the network terminal equipment and the analog telephone.
The system is characterized in that it can be used by switching between an SDN subscriber line exchange and an analog ink-face subscriber exchange.

〔Example〕

The present invention will be explained below with reference to Examples.

Referring to FIG. 1, an embodiment to which the present invention is applied includes: 1 office side switch l, analog interface subscriber line exchange 2, ISDN subscriber line exchange 31 and office side switching controller 4.
．． Inside switch 5. Analog telephone 6, network termination device 7.
and an indoor switching controller 8.

The central office switching device 1 is connected to an analog interface subscriber line exchange 2 through a terminal IP.

It is connected to the ISDN subscriber line exchange 3 via the terminal 1f/. The first-office side switching device l is switched and controlled by the one-office side switching controller 4 connected to the ISDN subscriber line exchange 3.

The in-home switching device 5 is connected to an analog telephone 6 through a terminal 5c, and is connected to a network termination device 7 through a terminal 5b. The in-home switching device 5 is switched and controlled by the in-home switching controller 8 connected to the network termination device 7. A terminal 1a of the office side switch l and a terminal 5a of the in-home switch 5 are connected via a two-wire subscriber line 9.

Here, the ISDN subscriber line exchange 3 and the network termination device 7 (
In other words, the terminals 1a and 1b of the 1st station side switch l are connected,
When the terminals 5a and 5b of the in-house switching device 5 are connected, if a fault occurs in the network termination device 7, this fault will be detected by the in-home switching controller 8. When the indoor switching controller 8 detects a fault, it controls switching of the indoor switching device 5 to connect the two-wire subscriber line 9 to the analog telephone 6.

When the analog telephone 6 is connected to the two-wire subscriber line 9, the ISDN subscriber line exchange 3 in which the two-wire subscriber line 9 is accommodated cannot receive digital signals from the network termination device 7. the result.

The two-wire subscriber line 9 is connected to the analog interface subscriber line exchange 2 under switching control. It will be connected via this path 9.

On the other hand, if a failure occurs in the ISDN subscriber line exchange 3, first the in-office switch l is switched over and then the in-home switch 5 is switched in the same manner as described above, so that the analog telephone 6 and the analog An interface subscriber line exchange 2 is connected via a two-wire subscriber line 9.

〔Effect of the invention〕

As explained above, one aspect of the present invention is the network termination device or I
When a failure occurs in the SDN subscriber line exchange.

Since the analog telephones in the subscriber's premises are connected to the analog interface subscriber line exchange, there is an advantage in that services can be provided using the subscriber S Gogo analog telephones.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of a switching system according to the present invention, and FIG. 2 is a block diagram of a conventional switching system. DESCRIPTION OF SYMBOLS 1... Office side switching device, 2... Analog interface subscriber line exchange, 3... ISDN subscriber line exchange, 4
... Office side switching controller, 5... Home side switching device, 6...
・Analog telephone, 7... Network termination device, 8... In-house switching controller, 9... 2-wire subscriber line, 10...
Subscriber line exchange, 11...2-wire subscriber line, 12...
・・In-house switch, 13・Analog telephone, 14・
...Network control device.

Claims (1)

[Claims] A premises switching device to which one end of a 1- and 2-wire subscriber line is connected, a network termination device and an analog telephone connected to the premises switching device, and a fault in the network termination device are detected, and a fault in the network termination device is detected. an in-house switching controller for switching and controlling the in-side switching device; an office-side switching device connected to the other end of the two-wire subscriber line; and an ISDN subscriber line exchange and analog connected to the office-side switching device. Interface subscriber line switch and the IS
a central office side switching controller that detects a fault in a DN subscriber line exchange and controls switching of the central office side switching device; 1. A digital subscriber line switching system, characterized in that the ISDN subscriber line exchange and the analog interface subscriber line exchange are switched and used by the office-side switching control device.