JPH0771149B2 - Remote maintenance method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to maintenance in a subscriber line carrier system, and more particularly to a remote maintenance system for performing maintenance by remote control.

[Conventional technology]

Generally, the subscriber line carrier system is a carrier system for relieving long-distance subscribers. Specifically, it has a carrier structure in which a station device (CT: Central Terminal) installed in a telephone station and a subscriber device (RT: Remote Terminal) installed at a distant point are connected by a line.

Conventionally, the maintenance of the subscriber unit in the subscriber line carrier system is provided with a maintenance unit 31a in the subscriber unit 31 as shown in FIG.
It was done by operating 1a. That is, each subscriber device independently performs maintenance regardless of the station device 32.

[Problems to be Solved by the Invention]

Since the conventional maintenance system for the subscriber device 31 is a system in which each subscriber device 31 performs individual maintenance, it has the following drawbacks.

(B) If the station device 33 and the subscriber device 31 are made by different manufacturers, the station device 33 cannot perform maintenance by remote control. Therefore, maintenance had to be performed at a remote location where the subscriber unit 31 was located.

(B) When the subscriber device 31 is maintained by remote control from the station device 33, as shown in FIG.
A maintenance unit 33a of a station device 33 and a maintenance unit 31b of a subscriber device 31 to which a terminal 32 for maintenance is connected.
I had to set up a control line to connect with.

An object of the present invention is to provide a remote maintenance system capable of maintaining a plurality of subscriber devices from a station device by using one line of a public network in order to solve the conventional problems.

[Means for Solving the Problems]

The present invention is a remote maintenance system in a subscriber line carrier system, in which a terminal for maintenance, a station device connected to the terminal via a public network, and a call from the terminal connected to the station device are provided. A subscriber unit equipped with a channel unit having an automatic call reception function and a modem function and a control unit connected to this channel unit to control the maintenance unit, and a maintenance unit of its own connected to the channel unit of this subscriber unit by multipoint connection. Is provided with a plurality of subscriber devices, each of which is equipped with a control unit for controlling.

〔Example〕

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

FIG. 1 is a block diagram showing a remote maintenance system according to an embodiment of the present invention.

In this embodiment, the station device 2 connected to the public network 1
, A terminal 3 that uses one line of the public network 1, a subscriber device 4 that is connected to the station device 2 and exists in a long distance, and a plurality of subscriber devices 5 that are multipoint-connected with the subscriber device 4.
(1) to 5 (n). As a result, the subscriber device 4 and the subscriber device 5 (1) can be remotely operated from the terminal 3.
Up to 5 (n) can be maintained.

The terminal 3 is for maintenance. Terminal 3
It is composed of a keyboard 3a, a display 3b capable of monitoring a response, and the like.

The subscriber unit 4 has its channel unit 4a and station unit 2
Is connected to the station device 2 via the channel unit 2a. The channel unit 4a includes an incoming circuit 4b and a modem.
4c and are provided. The receiving circuit 4b automatically performs a receiving operation for a call from the terminal 3, and the public network 1 is used for the terminal 3.
It has a function to use one line. The modem 4c is a modem corresponding to the PCM signal line 6 that connects the channel unit 2a of the station device 2 and the channel unit 4a of the subscriber device 4.

The subscriber device 4 and the subscriber devices 5 (1) to 5 (n) include maintenance units 4d and 5 (1) a to 5 (n) a, respectively. These maintenance parts 4d and 5 (1) a-5
(N) a has control units 4e, 5 (1) b to 5 (n) b, respectively. Subscriber device 4a and control units 4e, 5 (1) b-5
(N) b is connected by a multipoint connection line 7, and the control units 4e, 5 (1) b-5 (n) b are connected to the maintenance units 4d, 5 (1) a-5 (n) a as terminals. The control corresponding to the operation of No. 3 is performed.

Next, the maintenance operation of this embodiment will be described. However, in order to facilitate understanding, a case will be described in which the subscriber device 5 (1) is maintained from the terminal 3.

First, a call is made from the terminal 3 to the subscriber device 5 (1).

The call signal from the terminal 3 is input to the channel unit 4a of the subscriber unit 4 via the public network 1, the channel unit 2a of the station unit 2 and the PCM signal line 6.

When a call signal is input to the channel unit 4a, the incoming circuit
4b automatically performs the incoming call operation and uses one line of the public network 1 to maintain the terminal 3 and the maintenance unit 5 of the subscriber unit 5 (1).
(1) Connect a with the channel unit 4a.

When this connection is completed, the subscriber device 4 sends a reply indicating the connection completion to the terminal 3.

After this reply, the operator of the terminal 3 transmits the data indicating the content of the maintenance using the keyboard 3a.

This data is sent to the subscriber unit 5 via the public network 1, the station unit 2, the PCM signal line b, the subscriber unit 4, and the multipoint connection line 7.
Input to the control unit 5 (1) a of (1).

The control unit 5 (1) a of the subscriber unit 5 (1) controls the maintenance unit 5 (1) a based on the received data so as to perform the maintenance indicated by the data.

In this way, the subscriber device 5 (1) can be maintained by remote control from the terminal 3.

〔The invention's effect〕

As described above, the remote maintenance system of the present invention is a terminal for maintenance, a station device connected to this terminal via a public network, and a station device connected to this station device.
A subscriber unit equipped with a channel unit having an automatic incoming call function for receiving a call from a terminal and a modem function, a control unit connected to the channel unit and controlling a maintenance unit, and a channel unit of the subscriber unit and multipoint connection Since the control unit for controlling its own maintenance unit is provided with a plurality of subscriber devices respectively mounted, the following effects can be obtained.

(A) By data communication using the public network, the maintenance of the subscriber device can be remotely controlled regardless of the station device.

(B) The maintenance of a plurality of subscriber devices can be performed only by using one line of the public network.

[Brief description of drawings]

FIG. 1 is a block diagram showing a remote maintenance system according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b) are block diagrams showing a conventional maintenance system. 1 ... Public network 2 ... Station device 3 ... Terminal 5,5 (1) to 5 (n) ... Subscriber device 4a ... Channel unit 4b ... Incoming circuit 4c ... Modem 4d, 5 (1) a-5 (n) a ... Maintenance section 4e, 5 (1) b-5 (n) b ... Control section 7 ... Multipoint connection line

Claims (1)

[Claims] 1. A remote maintenance system in a subscriber line carrier system, comprising a terminal for maintenance, a station device connected to the terminal via a public network, and a call from the terminal connected to the station device. A subscriber unit equipped with a channel unit having an automatic incoming call function and a modem function and a control unit connected to this channel unit to control a maintenance unit, and a self-maintenance unit that is multipoint-connected with the channel unit of this subscriber unit. A remote maintenance system, comprising: a plurality of subscriber devices, each of which is equipped with a control unit for controlling the unit.