JPS6318854A - Remote maintenance and operation system for communication terminal equipment - Google Patents

Abstract

PURPOSE:To transfer automatically defect information, etc., to an information reception equipment by providing the information reception equipment connected with a communication terminal equipment and a general communication terminal protocol, identifying whether a digital communication or an analog communication is obtained, with a communicating terminal protocol and changing over it to one side communication with both the terminal equipment for the communication and the information reception equipment. CONSTITUTION:When a digital terminal 1A or 1B detects itself a fault, etc., the self-calling is executed to a digital subscriber line exchange 6A and the subscriber telephone number corresponding to an information reception equipment 7 is automatically dialed. When a digital communicating network 4 makes an incoming call to the information reception equipment 7, the information reception equipment automatically responds and the digital terminal 1A or 1B and a communicating path are stretched. Thereafter, by executing the transmission and reception between the digital terminal 1A or 1B and the information reception equipment 7, the defect fault, etc., are transmitted from the digital terminal 1A or 1B to the information reception equipment 7. When an analog terminal 3A or 3B self-detects the defect, etc., in the same way, the fault information, etc., are transmitted from the analog terminal 3A or 3B to the information reception equipment 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention enables efficient maintenance and operation of communication terminal devices.
The present invention relates to a remote maintenance/operation method for communication terminal equipment bTt for the purpose of improving communication terminal equipment bTt.

[Conventional technology]

Conventionally, the general maintenance method for communication terminals such as telephone equipment and data premises equipment is to notify the fault receptionist at the switching center within the communication network when a user or maintenance person discovers a malfunction in the terminal. 1. The failure receiver who receives the report performs a simple test based on the report information or from a test stand in the station through the communication line to determine whether the failure is occurring in the terminal or in the communication network equipment. Kiribun is checking to see if there are any.

In the case of a terminal failure, a maintenance person is dispatched to the site to repair or replace the malfunctioning terminal.

[Problem that the invention seeks to solve]

For this reason, for example, in a terminal such as a public telephone that is used by an unspecified number of people, even if the terminal is malfunctioning, another public telephone may be sufficient for communication, or in a terminal whose malfunction is difficult to detect just by looking at it, There was a problem in that the discovery of failures was delayed and the equipment operating rate was reduced.

Furthermore, when a user reports a malfunction, it is generally difficult for the person receiving the malfunction to grasp the exact nature and details of the malfunction. For this reason, maintenance personnel are often dispatched to the site to inspect and confirm the failure status, and then dispatched again to repair the system, resulting in problems such as delays in failure recovery and increased maintenance costs.

As a solution to the above problem, the present applicant previously proposed a method in Japanese Patent Application No. 59-19758 "Maintenance method for communication home equipment" (see Japanese Patent Application Laid-open No. 1977-17ZG7).
teeth.

This method involves installing a storage device within the station, having the terminal automatically transmit the information, and having the storage device receive and record failure information.However, with this method, it is difficult for maintenance personnel within the station to grasp the received failure information. Since the information is retrieved by accessing it again from the test stand, there is a lack of immediacy of failure information.

The present invention was made in view of the above circumstances, and its L1 purpose is to solve the above-mentioned problems in the conventional maintenance method,
The purpose of the present invention is to provide a quick and efficient remote maintenance and operation method for communication terminal equipment that can be realized without modifying the replacement equipment number.

[Means for solving problems]

The above object of the present invention is to provide a communication terminal device, an information receiving device for receiving (fl) failure information transmitted from the communication terminal device, and a communication network connecting the information receiving device and the communication terminal device. In a remote maintenance/operation system for a communication terminal device having equipment, the communication terminal device is accommodated in a digital communication network or an analog communication network, and the communication terminal device is connected to a corresponding subscriber line interface and self-detects failure. and an automatic transmitting/receiving means, the information receiving apparatus is accommodated in a digital communication network, and the information receiving apparatus is provided with a digital subscriber line interface, an automatic transmitting/receiving means, a processing means for received information, and a storage means. the communication terminal device and the information receiving device are connected by a general communication terminal protocol in the communication network equipment; After setting a communication path depending on whether the communication terminal device is a digital terminal or an analog terminal, failure information detected by the detection means in the communication terminal device is automatically transferred to the information receiving device. This is achieved through a remote maintenance and operation method for communication terminal equipment.

[Effect]

In the present invention, unlike in the past, an information receiving device is provided that is connected to a communication terminal device using a general communication terminal protocol, and the possibility of digital communication or analog communication is identified using the communication terminal protocol. And, by switching both the communication terminal device and the information receiving device to digital communication or analog communication, failure information, etc. can be automatically transferred from either the analog terminal or the digital terminal to the information receiving device. It is.

〔Example〕

FIG. 1 is a connection configuration diagram of a maintenance and operation system for a communication terminal device showing an embodiment of the present invention.

In the figure, IA is a digital telephone terminal, IB is a digital non-telephone terminal, 2A to 2C are digital line termination devices, 3A is an analog telephone terminal, 3B is an analog non-telephone terminal, 4 is a digital communication network, and 5A to 5C are inside the office. , 6A and 6B are digital subscriber exchanges, and 7 is an information receiving device installed in the maintenance center and having a digital subscriber line interface.

Further, 8 is an analog communication network, 9A and 9B are analog subscriber line exchanges, and 10 is a communication path set within the digital communication network, a digital l link connection path, IIA,
1113 is a communication path via the digital communication network and analog communication network; 12 is a communication path of the analog communication network.

The outline of the operation of this system is as follows.

When the digital terminal IA or IB self-detects a fault or the like, it makes a self-call to the digital subscriber line exchange 6A in the digital communication network 1 via the digital line termination devices 2 and 5, and calls the digital subscriber line exchange 6B in the digital communication network 1. Digital line termination equipment 2G.

This corresponds to the information receiving device 7 accommodated via 5C. Automatically dial subscriber phone numbers.

When the digital communication network 4 receives this, it is transmitted via the digital 1 link connection path 10 or the analog communication network 8, for example, along the communication path IIA → 12 → IIB route, which will be described later (see FIG. 4). When an incoming call is made to the information receiving device 7, the information receiving device automatically responds and a communication path is established with the digital terminal IA or IB.

Thereafter, according to the communication procedure described later (see FIG. 3) between the digital terminal IA or IB and the information receiving device 7, a digital code signal is sent in the case of the digital 1-link connection bus 10, and a PB in other cases. Fault information and the like are transmitted from the digital terminal IA or IB to the information receiving device 7 by transmitting and receiving the double signal.

Furthermore, if the analog terminal 3A or 3B self-detects a failure, etc., similarly, a communication path is established via the communication path 11A→10 or 12→IIB route via the analog subscriber exchange 9 in the analog communication 1118. Fault information etc. are transmitted from the analog terminal 3A or 3B to the information receiving device 7.

FIG. 2 is a block diagram of a public telephone type digital telephone terminal, showing a specific example of the above-mentioned digital telephone terminal. In the figure, numeral 2 denotes a Digimol line termination device connected to the digital telephone terminal, 13 a digital interface control section to be described later, and 14 a device control section for controlling the entire device.

Further, 15 is a charge processing unit, 15a, 18a, 20a
and 23a is a failure detection sensor, 16 is a code converter, 1
7 is a communication circuit, 18 is a handset, 19 is an input/output control unit,
20 is a non-telephone function section, 21 is a communication line, 22 is a station power supply section, and 23 is a commercial power supply section. These functions will be explained in order below.

The above-mentioned digital interface control unit 13 assembles the outgoing/incoming call detection control and the inch channel and out channel digital code signals into a transmission format (not shown) and sends them to the digital line termination device, or vice versa. It has a function of receiving the code signal sent from the terminal device 2, decomposing and extracting it into an inch channel signal and an out channel signal, and performing error control of the out channel signal.

The device control unit 14 decodes and controls the generation of out-channel signals, decodes and controls the generation of inch channel code signals transmitted and received with the information receiving device 7 shown in FIG. ) It has the function of controlling the entire device, such as input/output control of the B dial, function buttons, various displays, audible sounds, etc., and non-R talk equipment control.

The tF alloy processing unit 15 has a function of controlling charge collection based on the billing information of the device control unit 14, and the failure detection sensor 15a constantly detects failures in the charge processing unit 15, such as telephone card jams, etc. Or it has a function to monitor when the device is operating. Note that 15b transmits failure information detected by the failure detection sensor 15a to the device control unit 1.
4 shows the signal line for notification.

The code converter 16 has a function of converting, for example, a 64 kb/s digital audio signal into an analog audio signal, and vice versa, and the telephone call circuit 17 has a function of amplifying the analog audio signal. It has the following.

The failure detection sensor 18a has a function of detecting when the cord for the handset 18 is cut due to mischief or the like, and the failure detection sensor 18b transmits the cord disconnection information detected by the sensor 18a to the device control. A signal line for notifying the unit 14 is shown.

The input/output control section 19 has a PB dial, various indicators, speakers, etc., and the failure detection sensor 19a has a function of detecting a failure of the input/output control section 19.

The non-telephone function unit 20 has a non-telephone communication function such as facsimile, and the failure detection sensor 20a has a function to detect a failure of the non-telephone function unit 20.

The communication line 21 is a four-wire communication line that connects the digital line termination device 2 and the digital interface control unit 13, and the station power supply unit 22 receives power from the communication network via the communication A21. It has the function of extracting DC power, converting it into DC voltage required by the terminal, and supplying it to the terminal.

The commercial power supply section 23 has a function of converting the commercial power AC 100V into a DC voltage required by the terminal and supplying it to the charge processing section 15 and the non-telephone function section 20, which consume a large amount of power. The failure detection sensor 23a has a function of detecting a failure of, for example, a backup battery for a power outage of a commercial power source (not shown).

The operation of the digital telephone terminal of this embodiment configured as described above will be explained below.

In the case of a general telephone conversation, for example, when the handset 18 is picked up, an activation detection switch that is linked to a hook switch (not shown) operates, and the connection between the digital line termination device 2 and the digital interface control section 13 is activated. Of the four communication lines 21 to be connected, the loop of the two wires to which DC voltage is applied from the line termination device 2 is closed.

Then, a direct current flows through the communication line 21, enters the input side of the local power supply section 22 as it is, and outputs a predetermined direct current voltage to the output side. As a result, the device control section 14, digital interface control section 13, and others that operate on the local power are brought into a power-on reset state and activated.Next, under the control of the device control section 14, the commercial power supply section 23 is activated.
is activated, the entire terminal becomes activated, and between the digital interface control unit 13, the digital line termination device 2, and the line termination device of the communication network (not shown),
Starts digital signal synchronization establishment operation.

When synchronization is established, a control signal based on a communication protocol (described later in FIG. 3) is transmitted and received between the device control unit 14 and a digital subscriber line exchange (not shown) using an out-channel signal. As explained earlier, a communication path is established between the terminal and the other party.

When the other party's terminal responds, the control signal is transmitted and received through the out channel, and the charge processing unit 15 performs a charge collection operation, and at the same time, conversation is started using the inch channel.

In addition, in the case of a general incoming call, when an incoming call is received from 5 communication networks, one of the four communication lines 21 connecting between the digital line termination device 2 and the digital interface control unit 13 supplies the DC power. Direct current voltage is applied to two wires other than the second wire from the digital line termination device 2 side, and this is detected by an incoming call detection circuit (not shown) in the digital interface control unit 13 to operate a power supply activation circuit. As a result, the station power supply section 22 is activated, and from then on, communication procedures are substantially the same as those for the terminal call origination, and one communication is started.

Next, we will explain the operation when the terminal automatically detects a failure.

There are two main types of failure detection methods; one is, for example, detection by a failure detection sensor 18a for monitoring the disconnection of the handset cord due to mischief, and failure detection sensor 23a for backup batteries during power outages. There is a method in which power is supplied from the commercial power supply unit 23 even when the terminal is not operating, and the malfunction is constantly monitored. Examples of the detection methods include detection of a card jam or the like by the failure detection unit 15a of the charge processing unit 15, and failure detection by the failure detection sensor 20a of the non-telephone function unit 20.

For example, when the failure detection sensor 18a, which is constantly monitored, detects a failure, it notifies the device control unit 14 of the information via the signal line 18b, so that a startup detection switch (not shown) is activated, and the device The control unit 14 becomes activated.

Detected fault information is immediately called out according to a pre-programmed procedure, or is stored in a memory element (not shown) in the terminal and automatically called out at the necessary time.
The information is transferred as failure information to the information receiving device 7 explained in FIG.

Note that the terminal's fault information transfer function is Digital 1.
If a link path can be established, digital code signals are transmitted and received, and if an analog communication network exists in one communication bus route, PB double signals of 1-inch channel or F S (Fre
quency S 1ft) signal.

The device control section 14 has a transmission/reception control function.

FIG. 3 shows the I N
S (Information Network Sy
stem) is an example of a communication protocol, and represents the signal sequence after the establishment of signal synchronization between a digital terminal and a digital subscriber line exchange.The solid line is an out-channel control signal, and the dashed line is an inch channel audible tone ( l
It represents number i.

To explain the connection procedure, first, the originating terminal sends a calling signal to the originating exchange (step 1), and an acceptance signal is returned from the originating exchange (step 2). In response to this, the originating terminal sends communication class information to the exchange (step 3).
A ready-to-dial signal is returned (step 4). and,
When the calling terminal sends a dial signal (step 5),
After that, the calling party identification number (calling ID) is used as a common line signal between stations within the communication network.

Transfer communication class, called party identification number (called ID), etc. (
Step 6).

In response, the terminating exchange sends an incoming call signal to the terminating terminal (step 7), activates the 5 terminating terminals, and when the terminating terminal returns a confirmation signal to the terminating exchange (step 8), the call is forwarded from the originating exchange. By sending the received communication class information to the destination terminal (step 9), the destination terminal can determine what type of terminal the originating terminal is and what kind of communication it is requesting, for example.
The possibility of communication, such as telephone communication, text communication, or facsimile communication, is determined, and if mutual communication is possible, a call confirmation is returned to the receiving exchange (step 10).

Furthermore, by human operation or automatic reception operation, the destination terminal returns a response signal to the destination exchange to start communication (step 11), and an end-to-end communication path is set.
Start communication using inch channel (step 12)
~15).

Although communication class information is not shown here, transmission function specification information including transmission speed type, digital 1 link path setting request, etc., and compatibility confirmation information for mutually confirming the possibility of communication are included. be.

Therefore, according to this protocol, before an end-to-end communication path is set, it is possible, for example, to confirm a digital 1-link path and to identify whether a partner terminal is an analog terminal or a digital terminal.

In addition, consistency confirmation information is
This is an out-channel signal that is transmitted from end to end without any processing such as signal format conversion, and since the digital exchange is not particularly involved in how to use the signal and the user can use it freely, it is possible to create new ways to use the signal. However, there is no need to modify the communication network such as switching equipment.

FIG. 4 is a configuration diagram of the information receiving device 7. In the figure, 24 is a digital interface control section having substantially the same function as the digital interface control section 13 shown in FIG. 2, and 25 is a device that controls the entire device. control unit, 26
27 represents a code converter, 27 represents a 9j changeover switch, and 28 represents an analog code converter.

These functions will be explained in order below.

The device control unit 25 decodes and controls the generation of ARA 1-channel signals, decodes and controls the generation of inch-yannel code signals transmitted and received with digital terminals, and generates inch-yannel PB double signals transmitted and received with analog terminals. or FS
Control of decoding and generation of signals, transfer control of retransferring received information to other information receiving devices (not shown), etc., as necessary;

It has a function to control call control, etc.

The code converter 26 has the same function as the code converter 16 shown in FIG. 2, and the changeover switch 27 determines whether the inch-channel analog signal is output to the communication circuit side or to the device control unit side. The analog code converter 28 has a function of converting the code of the analog signal of the PB multiplied signal transmitted and received from the terminal.

Further, 29 is a telephone circuit, 30 is a handset, 31 is an operation unit for a maintenance person etc. to remotely control the terminal under test or operate the information receiving device itself, and 32 is an input/output control unit for information sent and received from the terminal. 33 is a display unit that performs display output, and 34 stores information.

An information storage section 35 indicates a printer section that prints out the information as required.

Next, an example of the operation of the information receiving device 7 when failure information is transferred from the digital telephone terminal (hereinafter simply referred to as "terminal") LA will be described.

First, according to the communication procedure described in FIG.
When an incoming call signal arrives, the digital interface control unit 24 detects the incoming call, automatically returns a response signal, and
It enters into a communication procedure with the destination digital exchange 6B shown in FIG. 1, and notifies the device control unit 25 of this fact.

In response to this, the device control unit 25 determines from the communication class information described in connection with FIG. After switching the changeover switch 27 to the analog code converter 28 side and preparing to transmit/receive using an analog 4G signal, etc., a communication state is entered with a calling terminal (not shown) in order to receive fault information, and information is transmitted and received.

The device control unit 25 analyzes the failure information, and outputs the received information to the display unit 33 and printer unit 35 via the input/output control unit 32 as necessary, or temporarily stores it in the information storage unit 34 and performs operation. Depending on the operation of the unit 31, the information is outputted to each of the output units, or a call is automatically made to a preset transfer destination via the digital interface control unit 24 and retransferred.

FIG. 5 corresponds to claim 1 of the present invention,
2 is a flowchart of an operation for automatically transferring failure information etc. from the terminal IA, explaining the operation of the first embodiment.

For example, when the failure detection sensor 1lla detects a failure (step 41) as shown in FIG. , automatically dials the pre-programmed subscription number of the information receiving device 7 (step 44).

Next, according to the communication procedure shown in FIG. 3, the digital 1 link path is confirmed (Step 45), and a response signal from the information receiving device 7 is received (Step 46). starts communicating the digital code signal using the 1-inch channel path, and the failure information is transferred from the terminal IA (step 47).

On the other hand, if the digital 1 link path is not set up, when an out-channel signal indicating that an analog network is intervening is received from the digital subscriber exchange 6A shown in FIG. 1 (step 48), the terminal IA The digital subscriber exchange 6A is notified by an out-channel signal that communication is to be carried out (step 49), and upon receiving a response signal (step 50), a P
Fault information is transferred to the information receiving device 7 using an analog 4g signal such as a B signal or an FS signal (step 51).

After the transfer is complete, enter the communication path disconnection procedure and end the communication (
Step 52).

FIG. 6 corresponds to claim 2 of the present invention,
12 is a flowchart of the operation of the information receiving device 7 when receiving information and when retransmitting information, explaining the operation of the second embodiment.

At the same time as the information receiving device 7 detects an incoming call (step 53), it is determined whether it is a digital 1 link path or not based on the out-channel communication class signal explained in FIG. 3 (step 54).

If it is a digital 1 link path, a response is automatically returned in step 55), and a digital mode is selected in the information receiving device 7 (step 56), and communication for receiving fault information etc. is performed using a digital code signal. , receives the necessary information (step 57).

If it is not a digital 1 link path, a response is automatically returned (step 58), an analog mode is selected (step 59), and failure information by an analog PB signal etc. is received (step 60).

Then, a call disconnection procedure is entered (step 61), and the line is released.

Next, in step 62, the information receiving device 7 determines whether or not to retransmit the received information based on preset criteria.
), if not retransferred, output to various input/output means such as the display, step 63), and end (step 64).

If it is determined that the transfer is to be re-transferred, a digital 1 link pass is requested for the transfer destination stored in advance, and a white call is made and an automatic dial is made (step 65).

When the digital 1 link path is set (step 66), it waits for receiving a response signal from the other party (step 67), and retransfers the transfer information from terminal IA using a digital code signal (step 68). ).

Also, if the digital 1 link path cannot be set,
The information receiving device 7 communicates even through an analog network;
Notify the other party (step 69), wait for a response from the other party (step 70), and retransmit the received information using an analog signal (step 70).
Step 71).

When the information transfer is completed, a call disconnection procedure begins (step 72) and ends.

According to each of the embodiments described above, a communication terminal accommodated in a digital communication network and having a digital subscriber line interface and information reception'! A maintenance system configuration consisting of A station, and
By providing both the communication terminal and the information receiving device with functions for transmitting and receiving digital code signals and analog PB signals, it is possible to identify whether or not a digital 1 link path is established at both the originating and receiving terminals. Depending on the route of the communication path, it is possible to automatically select whether fault information, etc. is to be transferred using a digital code signal or an analog PB signal. Also, from communication terminals accommodated in analog networks, analog PB signals etc. are used to
Another advantage is that fault information and the like can be easily transferred to the information receiving device.

Furthermore, in order to provide the above-mentioned information receiving device with a subscriber number and accommodate it in the communication network, maintenance and operation methods have to be changed.

Another advantage is that when adding functions, etc., it is possible to do so by simply modifying or changing one communication terminal and information receiving device, without requiring modification of the communication network.

In addition, by providing the information receiving device with a retransfer function, it is possible to centrally manage maintenance by retransferring information at night, during holidays, or when there are few maintenance personnel. Using the signal, the information receiving device side can also identify whether the call is a test call for fault information transfer or a general call, so general calls from other than the maintenance system or calls due to pranks will be treated as inch-channel communication. Since the information receiving device side can determine the location of the path setting, it also has the effect of automatically preventing erroneous connections and the like.

〔Effect of the invention〕

As described above, according to the present invention, a communication terminal device,
A remote maintenance/operation system for a communication terminal device, which includes an information receiving device that receives failure information transmitted from the communication terminal device, and a communication network facility that connects the information receiving device and the communication terminal device; In this method, the communication terminal device is accommodated in a digital communication network or an analog communication network, and the communication terminal device is provided with a corresponding subscriber line interface, a means for self-detecting a failure, and an automatic transmission/reception means. The above information receiving device is accommodated in a digital communication network, and the information receiving device is provided with a digital subscriber line interface, an automatic transmission/reception means, a received information processing means, and a storage means. The information receiving device is connected in the communication network equipment using a general communication terminal protocol, and between the communication terminal device and the information receiving device, the communication terminal device is a digital terminal. After setting a communication path depending on whether it is an analog terminal, failure information detected by the detection means in the communication terminal device is automatically transferred to the information receiving device, so there is no need to modify the replacement equipment. This has the remarkable effect of realizing a quick and efficient remote maintenance and operation method for communication terminal equipment that can be realized in the future.

Also, if an analog network is involved, or.

Since it is possible to receive fault information etc. from communication terminals accommodated in the analog network, maintenance and operation methods can be extended to existing analog terminals, and connected communications can be retransmitted from the information receiving device as necessary. This has the advantage that maintenance can be consolidated regardless of path, and maintenance and operation costs can be reduced.

[Brief explanation of drawings]

Fig. 1 is a connection configuration diagram of a maintenance/operation system for communication terminal equipment showing one embodiment of the present invention, and Fig. 2 is a diagram of a digital '6
j. A diagram showing a specific configuration example of a mobile phone terminal, FIG. 3 is a diagram showing an example of an INS communication protocol for explaining the operation of the embodiment, FIG. 4 is a configuration diagram of an information receiving device, and FIG. FIG. 6 is a flowchart of the 2003 work for automatically transferring failure information etc. from the terminal IA, which explains the first embodiment of the invention, and FIG. It is an operation flowchart at the time of information retransmission. IA, IB: digital terminal, 3A, 3B: analog terminal, 4: digital communication network, 6A, 613: digital subscriber exchange, 7: information receiving device, 8: analog communication network, 9A, 9B: analog subscriber exchange, 10. IIA
, IIB, 12: Communication path, 13.24: Digital interface control section, 14, 25: Device control section,
15a, 18a, 20a, 23a: Failure detection sensor, 27: Changeover switch, 31: Operation unit, 3
2: Input/output control unit.

Claims (2)

[Claims] (1) A communication terminal having a communication terminal device, an information receiving device that receives failure information transmitted from the communication terminal device, and a communication network facility that connects the information receiving device and the communication terminal device. In remote equipment maintenance and operation systems,
The communication terminal device is accommodated in a digital communication network or an analog communication network, and the communication terminal device is provided with a corresponding digital or analog subscriber line interface, means for self-detecting failure, and automatic transmission/reception means, and , the information receiving device is accommodated in a digital communication network, and the information receiving device is provided with a digital subscriber line interface, automatic transmission/reception means, received information processing means, and storage means, and the communication terminal device and the An information receiving device is connected with a general communication terminal protocol in the communication network equipment, and whether the communication terminal device is a digital terminal or an analog terminal is connected between the communication terminal device and the information receiving device. Remote maintenance of a communication terminal device, characterized in that after setting a communication path depending on the communication terminal device, failure information detected by the detection means in the communication terminal device is automatically transferred to the information receiving device. Operation method. (2) A communication terminal that includes a communication terminal device, an information receiving device that receives failure information transmitted from the communication terminal device, and communication network equipment that connects the information receiving device and the communication terminal device. In the remote maintenance and operation system of equipment,
The communication terminal device is accommodated in a digital communication network or an analog communication network, and the communication terminal device is provided with a corresponding digital or analog subscriber line interface, means for self-detecting failure, and automatic transmission/reception means, and , the information receiving device is accommodated in a digital communication network, and the information receiving device is provided with a digital subscriber line interface, an automatic transmitting/receiving means, a processing means for determining the necessity of retransfer, and a storage means. , the communication terminal device and the information receiving device are connected in the communication network equipment using a general communication terminal protocol, and the communication terminal device and the information receiving device are After setting a communication path depending on whether the device is a digital terminal or an analog terminal, failure information detected by the detection means in the communication terminal device is automatically transferred to the information receiving device, and if necessary, the failure information is transferred to the information receiving device. A remote maintenance and operation method for a communication terminal device, which is characterized by retransferring information from an information receiving device to another information receiving device.