JP2844753B2 - ISDN line monitor method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ISDN line monitoring system in a digital electronic exchange that interfaces with a primary group interface ISDN network.

[Conventional technology]

Conventionally, as shown in FIG. 6, this type of line monitor has a monitor between an ISDN network 1 and an ISDN line interface device 7 connected to a time division switch 3 controlled by a central control unit 4 of a digital exchange. The device 8 is connected, and a channel number is designated from the monitor device 8 to perform monitoring. Then, when monitoring another line, the monitor device 8 is moved near the corresponding ISDN line interface device 7 and the connection is changed to specify a desired channel number.

[Problems to be solved by the invention]

As described above, in the conventional method, when performing the line monitoring, the maintenance person of the exchange switches the monitoring device to the vicinity of the ISDN line interface device to which the line to be monitored is connected each time and changes the connection. There is the inconvenience of having to do it.

SUMMARY OF THE INVENTION An object of the present invention is to provide an ISDN line monitoring method which can be easily performed without moving and changing connection of a monitoring device of a desired line according to designation from the monitoring device and which can improve the efficiency of maintenance operation. It is in.

[Means for solving the problem]

According to the ISDN line monitoring method of the present invention, in a ISDN line monitoring method in a digital electronic exchange that interfaces with an ISDN network of a primary group interface, first receiving means for receiving line information to be monitored, a line number given in advance, Storage means for storing, a comparing means for comparing the line information and the line number and outputting when they match, an arbitrary one of the plurality of B channels of the primary group interface according to an instruction of the comparing means Selecting means for selecting a signal, multiplexing means for multiplexing one bidirectional signal for each of the B channel and D channel selected by the selecting means, and output control means for controlling the output of the signal multiplexed by the multiplexing means. An ISDN line interface device comprising: a transmitting unit for transmitting the line information to be monitored to the first receiving unit; Second receiving means for receiving the first signal output by the output control means, separating means for separating the first signal into B-channel and D-channel signals, and D signal separated by the separating means. A monitor device comprising: analysis means for analyzing a channel signal; interface means for monitoring a voice or data signal; and switching means for switching a B-channel signal to the interface means according to the analysis result of the analysis means. It is a configuration to have.

The first receiving means is connected to the transmitting means, and the output control means is connected to the second receiving means.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

Referring to FIG. 1 showing an embodiment of the present invention, an ISDN line interface device 2 connected to a time division switch 3 controlled by a central control device 4 of a digital exchange.
Is connected to the ISDN network 1 of the primary interface, and the output line of the ISDN line interface device 2 is connected to another ISDN network.
The output line and the input line of the DN line interface device 2 are respectively connected to the monitor device 5 in a duplex manner.

Here, when the user wants to monitor an arbitrary line, the maintenance person inputs a line number and a desired B channel number from the monitor device 5 so that all the ISDN line interface devices 2 connected to the monitor device 5 can be monitored. When a B channel selection instruction and a multiplex number output instruction are given, the corresponding ISDN line interface device 2 detects this and outputs a multiplex signal. The output is separated by the monitor device 5 to monitor a desired line.

FIG. 2 is a diagram showing the configuration of the ISDN line interface device 2 in FIG. In FIG. 2, the ISDN line interface device 2 is applied to a primary group interface of "23B + D", an ISDN interface circuit 21 for interfacing with the ISDN network 1, and a time division switch 3 connected to the ISDN interface circuit 21. Time-division switch interface circuit 22 that interfaces with
A D-channel control circuit 23 connected to the ISDN interface circuit 21 for transmitting and receiving D-channel control information to and from the central controller 4, and a B-channel selection for selecting any one of the B channels from B1 to B23 Circuit 24 and B
A signal multiplexing circuit 25 for multiplexing one bidirectional signal of each of the B channel and the D channel selected by the channel selecting circuit 24, an output control circuit 28 for controlling the output of the signal multiplexed by the signal multiplexing circuit 25, A signal receiving circuit 29 for receiving line information to be monitored, and a line number storage circuit for storing a line number given to each ISDN line interface device 2 in advance
27, and a line number comparison circuit 26 that compares the line information and the line number and outputs the result when they match.

FIG. 3 is a diagram showing a configuration example of a multiplexed signal. In FIG. 3, F is a synchronization flag signal, Bn and D are channel signals to the ISDN network 1, and Bn 'and D' are channel signals from the ISDN network 1.

FIG. 4 is a diagram showing an example of the configuration of an output control signal transmitted from the monitor device 5 to the ISDN line interface device 2. In FIG. 4, "LINE No." indicates the line number to be monitored, and "CONTROU" indicates B channel selection and ON / OFF control of multiplexed signal output.

FIG. 5 is a diagram showing a configuration of the monitor device 5 in FIG. 5, a signal transmitting circuit 57 for transmitting line information to be monitored to a signal receiving circuit 29 (FIG. 2), an output control signal transmitting circuit 58 for controlling the signal transmitting circuit 57, and an output control circuit 26 (for A signal receiving circuit 56 for receiving the signal output in FIG. 2) and a signal received by the signal receiving circuit 56
Signal separating circuit for separating into channel and D channel signals
51, a D-channel analysis circuit 55 for analyzing the D-channel signal separated by the signal separation circuit 51, a voice monitoring circuit 53 for monitoring voice, and a data signal monitoring circuit 54 for monitoring data signals. And a signal switching circuit 52 for switching the signal of the B channel to the voice monitoring circuit 53 or the data signal monitoring circuit 54 in accordance with the analysis result of the D channel analysis circuit 55.

The output control circuit 26 is connected to the signal receiving circuit 56 and the signal receiving circuit 29 is connected to the signal transmitting circuit 57 in a duplex manner.

The operation will be described below. The signal of the primary group interface with the ISDN 1 is
To B23 and a B channel signal and a D channel signal. The signal of the D channel is supplied to the D channel control circuit 23.
Transmitted to the central control unit 4 via the
The signals of the B channel up to B23 are B signals from the monitor device 5.
According to the channel selection instruction information, the B channel selection circuit 24
One designated B channel is selected and multiplexed with the D channel signal by the signal multiplexing circuit 25. In this case, the selection instruction information of the line to be monitored and the B channel is input from an input device such as a KEY, and is connected to the monitor device 5 from the output control signal transmission circuit 58 via the signal transmission circuit 57. All ISDN line interface devices 2
Output control signal. This output control signal is received by the output control signal signal receiving circuit 29, compared with the signal from the line number storage circuit 27 by the line number comparing circuit 26, and only when the line number matches, the multiplex signal from the signal multiplexing circuit 25 is output. The signal and the synchronizing clock signal are output, and the output is controlled by the output control circuit 26. The multiplexed signal and the clock signal for synchronizing the multiplexed signal via the output control circuit 26 are received by the signal receiving circuit 5 and separated by the signal separating circuit 51 into signals of respective channels. The D-channel analysis circuit 55 converts the D-channel signal into
For example, a call, a response, and the like are analyzed and displayed on an output device such as a CRT in a form that is easy for a maintenance person to understand. The signal switching circuit 52 switches the connection to the data signal monitoring circuit 54 depending on whether the communication channel Bn is voice or data. In the case of voice, it is monitored by an audio device such as a speaker, and in the case of a data signal, it is monitored by an output device such as a CRT.

〔The invention's effect〕

As described above, according to the present invention, the output control means and the signal receiving means of the plurality of ISDN line interface devices connected to the primary group interface are combined and connected to the monitor device, and the ISDN line interface devices are provided in advance to each ISDN line interface device. Compares the line number and the line information sent from the monitor device, and sends the multiplexed signal to the monitor device, and separates the multiplexed signal into a monitorable signal only when they match. With such a configuration, it is possible to easily monitor a desired line without moving or changing the connection of the monitor device by designation from the monitor device,
The efficiency of maintenance operation can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention, and FIG.
FIG. 3 shows a configuration example of a multiplexed signal, and FIG. 4 shows an example of a configuration of an output control signal transmitted from a monitor device to the ISDN line interface device. FIG. 5 is a diagram showing the configuration of the monitor device in FIG. 1, and FIG. 6 is a conventional ISDN
It is a figure for explaining a line monitor system. 1 ... ISDN network, 2,7 ... ISDN line interface device,
3 ... Time-division switch, 4 ... Central control unit, 5,8 ...
Monitor device, 6 maintenance terminal, 21 line interface circuit, 22 time-division switch interface circuit,
23 ... D channel control circuit, 24 ... B channel selection circuit, 25 ... Signal multiplexing circuit, 26 ... Line number comparison circuit, 27
…… Line number storage circuit, 28 …… Output control circuit, 29 …… Signal receiving circuit, 51 …… Signal separation circuit, 52 …… Signal switching circuit, 53 …… Sound monitor circuit, 54 …… Data signal monitor circuit, 55 ... D channel analysis circuit, 56 ... Signal reception circuit,
57: Signal transmission circuit, 58: Output control signal transmission circuit.

Claims (2)

(57) [Claims] In an ISDN line monitoring system in a digital electronic exchange that interfaces with an ISDN network of a primary group interface, first receiving means for receiving line information to be monitored, and storage means for storing a previously assigned line number. Comparing means for comparing the line information and the line number and outputting when they match, and selecting means for selecting an arbitrary one of the plurality of B channels of the primary interface according to an instruction of the comparing means An ISDN line comprising: multiplexing means for multiplexing one bidirectional signal for each of the B channel and D channel selected by the selecting means; and output control means for controlling the output of the signal multiplexed by the multiplexing means. An interface device; transmitting means for transmitting the line information to be monitored to the first receiving means; and output control means. Second receiving means for receiving the input first signal, separating means for separating the first signal into B-channel and D-channel signals, and analyzing the D-channel signal separated by the separating means Analysis means to perform
An ISDN line monitor system comprising: a monitor device having interface means for monitoring a voice or data signal, and switching means for switching a B channel signal to the interface means in accordance with an analysis result of the analysis means. . 2. The ISDN line according to claim 1, wherein said first receiving means is connected to said transmitting means, and said output control means is connected to said second receiving means. Monitor method.