JP3364864B2 - ISDN signal information monitoring method and apparatus - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and apparatus for monitoring ISDN signal information in a private automatic telephone exchange connected to ISDN.

[0002]

2. Description of the Related Art In recent years, many ISDN terminal devices connected to ISDN have realized a service unique to the ISDN terminal device based on the ISDN signal information, and the content of the ISDN signal information has an error. In some cases, it has been a hindrance in realizing the service.

As a result, it becomes necessary to analyze the ISDN signal information, but there is a problem that the contents of the ISDN signal information cannot be easily analyzed.

For example, even when the communication device connected to the ISDN is a private automatic telephone exchange (hereinafter referred to as PBX), there are many cases in which the ISDN terminal device is accommodated as an extension terminal device.

FIG. 1 is a relay system diagram for explaining the concept of analyzing ISDN signal information when an ISDN terminal device is accommodated in an extension of a PBX. In FIG. 1, IS
The PBX 10 is connected to the DN 108, and also the PB
The X10 accommodates the ISDN extension terminal device 20. In this configuration, in order to analyze the ISDN signal, I
SDN side reference point (T point) 11, extension side reference point (S point) 1
Analysis in 2 is required. Therefore, usually T point 11 and S point 1
In order to analyze the ISDN signal information of 2,
It has been common to connect an external device for monitoring and analyzing interface signal channel (hereinafter referred to as D channel) information.

Further, the conventional ISDN monitor control is a monitor system that focuses on a specific call for both the communication mode and the control signal, as described in Japanese Patent Application Laid-Open No. 1-149556. The communication device accommodated and connected to the ISDN does not have the function of monitoring the control signal.

[0007]

When the ISDN terminal device is accommodated in the PBX, it is necessary to connect an external device in order to analyze the T point, so that it is necessary to temporarily disconnect the line. However, if the number of communication channels controlled by the D channel (hereinafter referred to as the B channel) is large under the interface condition at the point T, a problem in operation occurs.

According to the present invention, when it becomes necessary to monitor ISDN signal information, the control device (software) in the communication device monitors the D channel, and the ISDN signal information is monitored without using an external device. An object of the present invention is to provide an information monitoring method and its device.

[0009]

An ISDN signal information monitor device of the present invention is connected to an I SDN , and the ISDN and I
ISD equipped with a communication device for exchanging SDN signal information
An N signal information monitor device, wherein the communication device is
A specific control message and special message is selected from the ISDN signal information.
Specifying means for specifying a constant information element, and the ISDN
The information of the ISDN signal to be picked up is monitored and the finger
The specific control message specified by the setting means and
And an extracting means for extracting the specific information element, and the extracting means.
The specific control message extracted by the stage and the specific control message
Storage means for storing information elements, and storage means stored in the storage means
The specific control message and the specific information element
Display means for displaying as character information .

Further, the ISDN signal information monitoring method of the present invention is connected to ISDN, and the ISDN and the ISDN signal are connected.
ISDN signal information with communication device for exchanging information
A monitoring method, wherein the I
Specific control message and specific from SDN signal information
Information elements of the ISDN and the communication device,
Monitor the exchanged ISDN signal information in advance
The specified control message and the specified information specified
When the report element is extracted, it is stored in the storage device and this
The specific control message and the special feature stored in the storage device.
Displaying certain information elements as character information on a display device
Is characterized by.

[0011]

According to the present invention, the IS in the control device in the communication device is
By incorporating the control means for monitoring the DN signal information, it is possible to monitor the ISDN signal information without affecting the call control even in a communication device in which a plurality of calls occur simultaneously without connecting an external device. It is easily possible.

[0012]

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

FIG. 1 is a diagram for explaining the reference points of the ISDN as seen from the PBX connected to the ISDN.

In the figure, ISDN 108 and PBX1
The reference point between 0 is called T point 11, and the reference point between the PBX 10 and the ISDN extension terminal device 20 is called S point 12.

FIG. 2 is a block diagram showing the overall configuration of the private branch exchange system.

In the figure, reference numeral 100 is a speech path switch of the PBX 10. Reference numerals 101, 102, and 103 are line circuits respectively connected to the speech path switch 100,
Reference numeral 101 is a line circuit for controlling the normal analog extension terminal device 21, and 102 is a line circuit for controlling the multi-function extension terminal device 22 having a display means. 103 is I
ISDN extension terminal device 2 equipped with SDN interface
It is a line circuit that controls 0. Reference numeral 107 denotes an ISDN basic interface composed of two communication channels (B channel) and one control channel (D channel), or an IS having an ISDN primary rate interface.
It is a trunk for DN (hereinafter referred to as ITRK) and ISD
N108 and the communication path switch 100 are connected. 1
Reference numeral 11 is a central control unit for controlling the entire PBX.
Reference numeral 9 denotes a storage device that sends and receives data to and from the central control unit 111 via the central control bus 110, and stores the processing state of control data and the like of the PBX 112.

FIG. 4 shows a structure of a memory area reserved for storing ISDN signal information in the storage device 109 shown in FIG. Since this area stores ISDN signal information from the start to the end of the call, the area is assigned to each message.

FIG. 5 shows a message and a message stored in the ISDN signal information save area 40 shown in FIG.
3 shows an example of the configuration of information elements existing in the page.

In FIG. 5, reference numeral 50 shows a message stack structure for call setting, 51 is a protocol identifier, 52 is a call number, 53 is a message type, 54 is a transmission capability, 55 is a channel identifier, and 56 is a 56. Indicates the calling party number. Reference numeral 60 shows an information element stack structure of charge information, 61 is an information element identifier, 62 is a content length, and 63.
Indicates an extension / reservation / charge type, and 64 indicates a number digit.

Next, the concept of the ISDN signal information monitor system in the present invention will be described.

As points for monitoring ISDN signal information, there are T point 11 and S point 12 shown in FIG. 1, but the information on T point 11 shown in FIG. 1 is the information on S point 12 in FIG. It is generally known that the contents are transparently transmitted even when seen.
Therefore, if the PBX 10 shown in FIG. 2 is taken as an example, T
The information at the point 11 is extracted based on the accommodation position information of the ITRK 107, and the information at the S point 12 is extracted based on the accommodation position information of the line circuit 103. Here, the accommodation position defines a mounting position of a line circuit or a trunk, and is allocated for each circuit (channel). A line circuit 103 and an ITRK 107 having such an ISDN interface.
As described above, the ISDN signal information is S
Since the point is the same as the T point, the reference point for monitoring the ISDN signal information may be either the S point 12 or the T point 11. However, the line circuits 101 and 1 for accommodating extension terminal devices that do not have an ISDN interface, such as the analog extension terminal device 21 and the multi-function extension terminal device 22.
Regarding 02, since there is no interface on the S point, the T point is defined as the reference point for monitoring the ISDN signal information in consideration of these contents.

Next, the ITRK 10 serving as an interface trunk for transmitting / receiving the ISDN signal information on the T point 11
A trunk 7 is composed of a plurality of circuits (B channels). When calling from the analog extension terminal device 21, the multi-function extension terminal device 22 and the ISDN extension terminal device 20 accommodated in the PBX 10 to the ISDN 108, the PBX 1
Since the channel to be captured can be freely selected by controlling 0, it is easy to determine the channel to be monitored. However, when there is an incoming call from the ISDN 108 to the PBX 10, it is uncertain which channel of the ITRK 107 composed of a plurality of channels will be the incoming call target. Therefore, the target channel is extracted by the following method.

FIG. 6 shows an extension required for call control,
It is the figure which showed the specific part of the call control memory of a trunk.

First, when there is an incoming call from the ISDN 108 to the PBX 10, the incoming call mode is selected so that the incoming call destination becomes a specific extension call. For example, when the ISDN 108 is an office line subscriber network, a direct-in dial system, a dial-in system, or the like is used as an incoming call system for making the extension call. In the case of the present invention, the destination subaddress is used as a means for selecting the destination extension terminal device. This method is generally known as an incoming call method using a called subaddress. First, the destination extension terminal device shown above is referred to as an analog extension terminal device 21. The caller performs a dial operation for designating the analog extension terminal device 21 to the destination sub-address and makes a call to the PBX 10. Next, the central control unit 111 of the PBX 10 detects the called sub-address from the call setting message of the incoming signal. And the central controller 111
The destination analog extension terminal device 21 is selected from the detected destination subaddress. When the central control unit 111 executes the incoming call control by the call setting message, the ITRK1
The target channel of 07 and the target channel of the analog extension terminal device 21 form a linkage in the memory necessary for executing the call control allocated in the RAM area in the storage device 109, respectively, as shown in FIG. As shown in the figure, the call control memory is configured to store mutual accommodation position information.

Therefore, by referring to the call control memory of the analog extension terminal device 21, the receiving target trunk accommodation position information in this case is determined, and thus the channel of the target trunk can be guided.

As described above, by designating the accommodation position information of the extension terminal device, the monitored channel under the T point condition becomes clear.

From the above description, even when the PBX 10 is in operation and a plurality of calls are made, it is possible to easily determine the channel to be monitored by providing the means for designating the extension terminal device. It will be possible.

Next, the operation of the ISDN signal information monitor system according to the present invention will be described.

FIG. 3 is a diagram showing an area for registering the accommodation position information of the extension terminal equipment necessary for monitoring the ISDN signal information.

To start monitoring the ISDN signal information, the operator first specifies the accommodation position of the extension terminal device as described above. When designating the extension terminal device, the extension number of the extension terminal device to be monitored is designated by dialing from any extension terminal device. Then, the central control unit 111 analyzes the dial information and derives the extension terminal device accommodation position information from the extension number.
As a result, the accommodation position information is registered in the extension terminal device accommodation position registration area 30 shown in FIG.

Next, when a call is made via the ITRK 107 shown in FIG. 2, the control for transmitting / receiving the ISDN signal information is activated. Based on the flow chart shown in FIG. 7, the ISDN signal information shown in FIG.
Control up to storage in the buarea 40 will be described.
First, the central control unit 111 refers to the extension terminal device accommodating position registration area 30 shown in FIG. 3 to determine whether or not there is a request for monitoring ISDN signal information (S10, S).
11). If there is registration, it is determined whether or not the accommodation positions of the registered extension terminal device and the extension / reception target extension terminal device match (S12, S13). If they match, it is determined whether the ISDN information element is a transmission condition or a reception condition (S14, S1).
5) If the transmission conditions are met, the ISDN transmission information is extracted from the ISDN signal information transmission buffer 70 provided on the RAM area in the storage device 109 for transmitting the ISDN signal information shown in FIG. 8 (S18). . Incidentally, ISDN
When the signal information is transmitted, the ISDN signal information is edited so that the information is once stored in the ISDN signal information transmission buffer 7.
It is stored in 0. If the reception condition is met, I connected to the T point by the method described above.
The target channel of TRK107 is determined (S16).
When the target channel is determined, the ISDN signal information output to the memory space on the hardware corresponding to the target channel is extracted (S17), and the ISDN transmission / reception information is I
It is stored in the SDN signal information save area 40 (S1
9). This control is continued while the call control is being executed.
In this way, the ISDN signal information is the ISD shown in FIG.
The signals are sequentially stored in the N signal information save area 40 in message units.

The stored message information is monitored by the multi-function extension terminal device 22 shown in FIG. The multifunctional extension terminal device 22 is an extension terminal device having a display means, and by operating the multifunctional extension terminal device 22,
Display control is executed by performing control to read the ISDN signal information stored in the ISDN signal information save area 40 shown in FIG. When the monitor result is actually displayed on the display unit of the multi-function extension terminal device 22, not only the data of transmission and reception are displayed as they are, but also various kinds of data are displayed.
It is also possible to convert it to a matte and display it as character information that allows the operator to understand the contents of the message at a glance. Further, the stored message information is used for canceling the registration from any extension terminal device in the control processing for canceling the accommodation position information registered in the extension terminal device accommodation position registration area 30 shown in FIG. Saved until the request is fulfilled.

Next, a description will be given of the operation in the case of performing the monitor control limited to a specific message and further to the information element within the specific message.

FIG. 10 is a schematic flowchart showing the execution of the above monitor control. S17 and S1 shown in FIG.
It is executed after 8.

FIG. 9 is an area for storing data necessary for realizing the above monitor control, and includes a message designation registration area 70 and an information element designation registration area 80.
Are allocated to a specific memory area in the storage device 109 shown in FIG.

When starting the above monitor control, first, the extension number of the extension terminal device to be monitored is designated by dialing from any extension terminal device. After that, a dial operation for designating a message and a dial operation for designating an information element are further performed from any extension terminal device, and an area for designating the information necessary for distinguishing the message and the information element is provided. Register with. As a result,
Each identification code is registered in the designated area indicated by.

Next, the operation of the monitor control limited to a specific message and an information element within a specific message will be described based on the flowchart shown in FIG.

First, after S17 and S18 shown in FIG. 7, it is determined whether or not a message is designated (S20, S21).
If no message is specified, the process shifts to monitor control for all messages (S30). If a message is designated, it is determined whether the transmitted / received message matches the designated message code (S).
22, S23). If it does not match, exit the monitor,
If they match, the message is stored in the ISDN signal information save area 40 shown in FIG. 4 (S14). Next, it is determined whether or not the information element is designated (S25, S2
6) If the information element is not specified, the monitor is terminated, and if the information element is specified, it is determined whether or not the specified information element exists in the message stored in S24 ( S27, S28). If it does not exist, the monitoring is terminated, and if it exists, the target information element is stored in the ISDN signal information save area 40 shown in FIG. 4 (S2).
9). Display control of stored messages and information elements is executed by the message display control described above.

As for the monitor control method for designating the specific message and the information element, an example in which one message information is designated is described, but a plurality of message information is designated. Even in the case, monitor control is possible.

Further, according to the present embodiment, the target for monitoring the ISDN signal information is specified and described as the extension terminal device having the display means. However, in the case of a communication device such as PBX, the communication device is used. It is also possible to substitute a maintenance console or the like that can access the internal memory.

As described above, according to the present embodiment, the ISDN signal information is monitored in the communication device connected to the ISDN which is composed of various extension terminal devices such as PBX and a plurality of ISDN trunks. Without the need for an external device for
Monitor control of SDN signal information can be easily realized.

[0042]

As is apparent from the above embodiment, the present invention has the following effects when the ISDN signal information is monitored and analyzed in the communication device connected to the ISDN.

(1) A communication device that does not require connection of an external device for analyzing ISDN signal information and accommodates an extension terminal device having a display means can easily perform monitor control of ISDN signal information. Become.

(2) Furthermore, since it is possible to prevent a momentary disconnection of the line due to the connection of an external device, it becomes possible to perform monitor control without disturbing the communication device in the operating state.

[Brief description of drawings]

FIG. 1 ISDN as seen from PBX connected to ISDN
It is the figure which showed the reference point.

FIG. 2 is a block diagram showing an overall configuration of a private branch exchange system to which the ISDN control information monitoring system of the present invention is applied.

FIG. 3 is a diagram showing an area for registering an accommodation position of an extension terminal device required for monitoring ISDN signal information.

FIG. 4 is a diagram showing an area for saving ISDN signal information.

FIG. 5 is a diagram showing a configuration example of a message and information element of ISDN signal information.

FIG. 6 is a diagram illustrating a specific portion of a call control memory for an extension and a trunk, which is necessary when performing call control.

FIG. 7 is a flowchart for explaining monitor control of ISDN signal information.

FIG. 8 is a diagram showing an area for accumulating the ISDN signal information when the information is transmitted.

FIG. 9 is a diagram showing an area for designating a message or the like when monitoring ISDN signal information.

FIG. 10 is a flow chart for explaining a variation of monitor control of ISDN signal information.

[Explanation of symbols]

10 ... PBX, 11 ... T point, 12 ... S point,
100 ... Call path switch, 101-103 ... Line circuit control device, 107 ... ISDN trunk,
108 ... ISDN, 109 ... Storage device, 110
... Central control bus, 111 ... Central control device, 20
・ ・ ・ ISDN extension terminal device, 21 ・ ・ ・ Analog extension terminal device, 22 ・ ・ ・ Multifunctional extension terminal device, 30 ・ ・ ・
Extension terminal accommodation location registration area, 40 ... ISDN
Signal information save area, 50 ... Call setup message stack configuration, 51 ... Protocol identifier, 52 ...
・ Call number, 53 ... Message type, 54 ... Transmission capability, 55 ... Channel identifier, 56 ... Calling number,
60 ... Information element stack structure of charge information, 61 ...
Information element identifier, 62 ... content length, 63 ... extension / reservation / charge type, 64 ... number digit, 70
.. ISDN information transmission buffer, 80 ... Message designation registration area, 90 ... Information element designation registration area

   ─────────────────────────────────────────────────── ─── Continued front page       (56) Reference JP-A-5-37631 (JP, A)                 JP 62-38052 (JP, A)                 JP-A-3-177147 (JP, A)                 JP-A-2-261248 (JP, A)                 JP-A-2-210937 (JP, A)                 JP-A-3-173257 (JP, A)                 JP-A-4-135353 (JP, A)                 JP-A-4-326648 (JP, A)                 JP-A-4-211562 (JP, A)                 JP-A-4-260259 (JP, A)                 JP-A-5-48714 (JP, A)

Claims (3)

(57) [Claims] 1. A connected to the I SDN, the ISDN and ISD
An ISDN signal information monitoring device including a communication device for exchanging N signal information , wherein the communication device includes a specific control message and a control message from the ISDN signal information.
And ISDN signal information exchanged with the ISDN, and a specifying means for specifying a specific information element.
Monitor and the specific specified by the specifying means.
Extraction for extracting control message and said specific information element
Means, the specific control message extracted by the extracting means, and
Storage means for storing a specific information element, the specific control message stored in the storage means, and
Display means for displaying the specific information element as character information
And an ISDN signal information monitor device. 2. The communication device comprises a terminal device,
The display means is provided in the terminal device.
The ISDN signal information monitor device according to claim 1. 3. ISDN and ISD connected to ISDN
ISDN communication equipped with a communication device for exchanging N signal information
A method for monitoring signal number, wherein whether the ISDN signal information is previously stored in the communication device.
Specific control message and specific information element from
The communication device communicates with the ISDN through the I
The SDN signal information is monitored to monitor the SDN signal information.
When the control message and the specific information element are extracted,
This is stored in a storage device, and the
A specific control message and the specific information element
ISDN characterized by displaying as a report on a display device
Signal information monitoring method.