JPH07107157A - Protocol monitor device - Google Patents

Abstract

(57) [Abstract] [Purpose] Used for maintenance and operation of ISDN exchanges, enabling area-free remote maintenance, and if you want to monitor only communications between specific user terminals, you can set the filter settings only by specifying the user address. I can do it. [Structure] An extraction unit 6 for extracting the communication content of a user terminal 1 accommodated therein is provided inside an ISDN exchange 2. The user setting information or the call request packet frame is extracted from the communication content extracted by the extraction unit 6, and the user address in the content of the extracted frame is the user address information of the user terminal 5 sent from the control terminal 9. The automatic filter unit 12 that determines whether or not the user address matches with the user address and specifies the filter parameter from the content of the frame and automatically sets the filter parameter is provided. Then, the automatic filter unit 12 monitors only the frame corresponding to the set filter parameter in the communication content extracted by the extraction unit 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a protocol monitor, and more particularly to a protocol monitor used for maintenance and operation of an ISDN exchange and capable of selectively monitoring communication between specific user terminals.

[0002]

2. Description of the Related Art Generally, when transmitting and receiving information via a communication line, etc., it must be carried out according to a predetermined protocol, and if necessary, it is verified whether the communication is carried out according to the protocol. Is performed. FIG. 2 shows a conventional configuration in which a protocol is monitored for communication between terminals connected to a switching network. In FIG. 2, two exchanges 22 and 24 are provided, which are connected to each other via a network 23. Each of the exchanges 22 and 24 has a user terminal 21,
25 are accommodated. To monitor the protocol for a specific user terminal 21, the maintenance person directly goes to the exchange 22 in which the specific user terminal 21 is accommodated, and the measuring instrument (protocol monitor) 26 is used for this exchange 22.
By connecting to.

In the case of ISDN, that is, at least the user terminal 21 is an ISDN terminal and the exchange 22
Is an ISDN switch. User terminal 21
When selectively trying to selectively monitor only the communication from the user to the user terminal 25 of the specific other party, in the case of the circuit switching service, the service access point identifier (SAPI) and the call number (CR) are used, and in the case of the packet switching service In that case, it is necessary to specify the logical channel number (LCN) and the logical channel group number (LCGN) as filter parameters, respectively, and to extract only the data having the specified filter parameters. These SAPI,
Each parameter of CR or LCN and LCGN is unique to a specific communication between users. Therefore, when monitoring only the communication from the specific user terminal 21 to the specific counterpart user terminal 25, the maintenance staff estimates the above-mentioned filter parameter by himself, sets the estimated value, and monitors it. I made it, and if the estimation was incorrect, I set it again.

As a protocol monitor device applied to ISDN, Japanese Unexamined Patent Publication No. 3-99552 discloses a device connected to a bus line in a house to monitor data on the bus line. Further, Japanese Patent Laid-Open No. 3-49329 discloses a packet communication using ISDN, in which a monitor device is provided in each ISDN exchange and the data obtained by these monitor devices are collated at a remote place.

[0005]

The above-mentioned conventional protocol monitoring method requires a person in charge of maintenance to directly monitor only communication between specific user terminals in ISDN regardless of circuit switching service or packet switching service. SAPI or CR, LCN or LCG
Since it is necessary to set a filter parameter such as N, there is a problem that it is difficult to perform remote maintenance. In addition, since the above-mentioned filter parameters are set based on the estimation, there is a problem that trial and error are involved and operability and workability are poor.

It is an object of the present invention to provide a protocol monitor device capable of automatically setting a filter from a remote place only by inputting a user address and selectively monitoring only communication between specific user terminals. It is in.

[0007]

A protocol monitor device of the present invention issues an instruction to perform a protocol monitor, and
Control terminal for outputting the first user address information corresponding to the terminal and the second user address information corresponding to the second terminal, the instruction from the control terminal and the user address information. Transmitting and receiving means for receiving the monitor result and transmitting the monitoring result to the control terminal; extracting means provided in the ISDN exchange for extracting the communication content of the first terminal according to the first user address information; A call setup frame or a call request packet frame is extracted from the communication content extracted by the means, and whether the user address in the content of the extracted frame matches the user address represented by the second user address information. If it is judged that they match, the filter parameter is specified from the content of the frame and automatically set, and thereafter, the communication parameters extracted by the extraction means are used. Of these, monitor means for monitoring only the frame corresponding to the filter parameter, accumulating means for accumulating the monitor result by the monitor means, and monitor result to the control terminal via the transmitting / receiving means according to an instruction from the control terminal. And a transfer means for transferring.

[0008]

The transmitting / receiving means to which the control terminal for maintenance is connected is provided, and since the instruction for protocol monitoring, the user address information, and the monitor result are exchanged between the controlling terminal and the transmitting / receiving means, only the control terminal is remote. Area-free maintenance is possible. In this case, the control terminal and the transmitting / receiving means can be connected via the public packet network. Since the extraction means is provided in the ISDN exchange, it is possible to extract only the communication content of the first terminal specified by the first user address information. further,
The call setting frame (SET) is selected from the communication contents of the first terminal.
UP frame) or call request packet frame (CR
Packet frame) and determines whether the user address in the extracted frame content matches the user address represented by the second user address information. If they match, the filter parameter is specified from the content of the frame. Since it has a monitor means for monitoring only the frame corresponding to the automatically set filter parameter among the communication contents of the first terminal after that, the specific content from the specific terminal (first terminal) is specified. Counterpart terminal (second terminal)
Only communications to or from can be selectively monitored.

Generally, services provided by ISDN are roughly classified into circuit switching services and packet switching services. In the case of circuit switching services, call setup frames (S
The ETUP frame) is extracted, and the service access point identifier (SAPI) and call number (CR) are automatically set as filter parameters. On the other hand, in the case of the packet switching service, the call request packet frame (C
R packet frame) is extracted, and a logical channel number (LCN) and a logical channel group number (LCGN) are set as filter parameters.

[0010]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of a protocol monitor device according to an embodiment of the present invention.

ISDN exchanges 2 and 4 are interconnected via a network 3. The first ISDN exchange 2 accommodates the user terminal 1 of originating (or receiving) credit, and the second ISDN exchange 2
The exchange 4 accommodates a user terminal 5 with incoming (or outgoing) credit. Inside the first ISDN exchange 2, the ISD
An extraction unit 6 for extracting the communication content of a specific terminal accommodated in the N exchange 2 is provided. The terminal to be extracted by the extraction unit 6 can be arbitrarily set by inputting the user address of the terminal from the outside.

An exchange maintenance operation device 7 is connected to the first ISDN exchange 2. Switch maintenance and operation device 7
Is used for remote maintenance of the ISDN exchange 2, and is capable of exchanging necessary information with a control terminal 9 provided in a maintenance center at a remote location via the public packet network 8. . The control terminal 9 is used for maintenance and operation of the ISDN exchange 2. Specifically, the control terminal 9 issues a protocol monitor instruction to the exchange maintenance / operation device 7, sends user address information to the exchange maintenance / operation device 7, and It is configured to receive a monitor result from the maintenance operation device 7 and translate the monitor result to display it to a maintenance person.

A main body 10 of a protocol monitor device is connected to the exchange maintenance operation device 7. A line interface unit 11, an automatic filter unit 12, a control unit 13, and a storage unit 14 are provided inside the main body unit 10. The line interface section 11 is a section for interfacing with the exchange maintenance operation device 7, and receives the communication contents extracted by the extraction section 6 in the ISDN exchange 2. The automatic filter unit 12 extracts the call setting frame or the call request packet frame from the communication contents extracted by the extracting unit 6, and the user address in the contents of the extracted frame is the user who is sent from the control terminal 9. It is determined whether or not it matches the user address indicated by the address information, and if it matches, the filter parameter is specified from the content of the frame and automatically set. After the automatic setting of the filter parameter is performed, the automatic filter unit 12 monitors only the frame corresponding to the set filter parameter in the communication content extracted by the extraction unit 6. The accumulation unit 14 is for accumulating the monitor result of the automatic filter unit 12. The control unit 13 controls the operation of the entire main body unit 10, and receives an instruction and user address information from the control terminal 9 via the exchange maintenance operation device 7, and a monitor obtained by the automatic filter unit 12. The results are stored in the storage unit 14, and the monitor results stored in the storage unit 14 are transmitted to the control terminal 9 via the exchange maintenance operation device 7.
To transfer to.

Next, the operation of this embodiment will be described. A specific user terminal (first user terminal 1) accommodated in the first ISDN exchange 2 and a specific user terminal (second user terminal 5) accommodated in the second ISDN exchange 4
If you want to selectively monitor only the communication between
An instruction to monitor the protocol between the data terminals 1 and 5 from the control terminal 9 in the maintenance center to the exchange maintenance and operation apparatus 7 via the public packet network 8 and user address information for each of these user terminals 1 and 5. To send. The exchange maintenance operation device 7 accepts the instruction from the control terminal 9 and the user address information, and instructs the first ISDN exchange 2 to extract the communication content of the accommodated first user terminal 1. To do. In response to the extraction instruction, the extraction unit 6 refers to the user address information corresponding to the first data terminal 1 to extract the communication content of the first user terminal 1 and the main body via the exchange maintenance operation device 7. It is transmitted to the section 10. At the same time, the exchange maintenance operation device 7 transfers the user address information corresponding to the second user terminal 5 to the control unit 13.

In the main body unit 10, the communication contents of the first user terminal 1 extracted by the extracting unit 6 are first accepted by the line interface unit 11. Under the control of the control unit 13, the automatic filter unit 12 sets the call setting (SET) in the case of the circuit switching service from the extracted communication content.
UP) frames are extracted, and in the case of a packet switching service, call request (CR) packet frames are extracted, and the destination (source) user address described in the content of these extracted frames is the second user terminal. A search is performed to see if it matches the user address of. As a result of this search, if a call setup frame or a call request frame with a matching user address is found, filter parameters are extracted from the found frame and automatically set. In the case of circuit switching service, the service access point identifier (SAPI) and call number (CR) are extracted as filter parameters, and in the case of packet switching service, the logical channel number (LCN) and logical channel group number (LCGN) are extracted. It is extracted as a filter parameter.

When the automatic setting of the filter parameters is completed, the automatic filter unit 12 starts monitoring according to the set filter parameters. That is, although the communication content extracted by the extraction unit 6 is sequentially input to the automatic filter unit 12, the automatic filter unit 12 selects only the frames corresponding to the automatically set filter parameters among the frames of the input communication content. To monitor. The monitoring result is temporarily stored in the storage unit 14 via the control unit 13. At the same time, the header information to which the time information and the frame number are added is created, and the header information is used as the exchange maintenance operation device 7
At the control terminal 9, which is transmitted to the control terminal 9 via, the header information is translated and displayed.

The maintenance person confirms the displayed header information, gives an instruction from the control terminal 9 if necessary, and stores the data in the storage unit 1.
The monitor results accumulated in 4 are searched. as a result,
The necessary monitor result is transferred from the storage unit 14 to the control terminal 9 via the control unit 13 and the exchange maintenance operation device 7,
Translated and displayed.

[0018]

As described above, according to the present invention, the transmission / reception means to which the control terminal for maintenance is connected is provided, and the instruction for performing the protocol monitor, the user address information, and the monitor result are provided between the control terminal and the transmission / reception means. Are exchanged,
This has the effect of enabling area-free remote maintenance. Further, a call setup frame or a call request packet frame is extracted from the communication content of the first terminal, and whether the user address in the content of the extracted frame matches the user address represented by the second user address information. If it matches, a filter parameter is specified from the content of the frame and automatically set, and thereafter, a monitor that monitors only the frame corresponding to the automatically set filter parameter in the communication content of the first terminal. Since it has the means, there is an effect that the filter setting by the user address becomes possible.

[Brief description of drawings]

FIG. 1 is a block diagram showing a protocol monitor device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a conventional configuration when a protocol is monitored.

[Explanation of symbols]

 1,5,21,25 User terminal 2,4 ISDN exchange 3,23 Network 6 Extraction unit 7 Exchange maintenance and operation equipment 8 Public packet network 9 Control terminal 10 Main unit 11 Line interface unit 12 Automatic filter unit 13 Control unit 14 Storage unit 22,24 Exchanger 26 Measuring instrument

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI Technical display location H04L 12/26 H04M 3/22 Z H04Q 11/04

Claims (2)

[Claims] 1. A protocol monitor device used for maintenance and operation of an ISDN exchange, which issues an instruction to perform a protocol monitor and corresponds to first user address information corresponding to a first terminal and a second terminal. A maintenance control terminal for outputting second user address information, a transmission / reception unit for receiving the instruction and each user address information from the control terminal and transmitting a monitor result to the control terminal, the ISDN exchange An extracting unit provided in the extracting unit for extracting the communication content of the first terminal according to the first user address information; and a call setting frame or a call request packet from the communication content extracted by the extracting unit. A frame is extracted, and the user address in the content of the extracted frame matches the user address represented by the second user address information. Monitor means for identifying and automatically setting a filter parameter from the content of the frame if the two match and thereafter monitoring only the frame corresponding to the filter parameter in the communication content extracted by the extracting means. A protocol monitor device comprising: a storage unit for storing a monitor result of the monitor unit; and a transfer unit for transferring the monitor result to the control terminal via the transmitting / receiving unit. 2. The protocol monitor device according to claim 1, wherein said control terminal translates and displays a monitor result, and said control terminal and said transmitting / receiving means are connected via a public packet network.