JPH04135353A - Isdn line monitoring system - Google Patents

Abstract

PURPOSE:To unnecessitate the movement of a monitor device and the switch of connection and to improve efficiency for maintenance by connecting an ISDN line monitor device to output signal lines from plural ISDN line interface devices and monitoring all the channels of an arbitrary ISDN line by the ISDN line monitor device. CONSTITUTION:An ISDN line interface device 2 of a digital electronic exchange houses ISDN terminals 1 of a basic interface respectively, a signal multiplexing circuit 24 multiplex the signals of two B channels B1 and B2 and one D channel D to be transmitted/received with the ISDN terminals 1, and an output control circuit 25 controls the transmission of the signals multiplexed by the signal multiplexing circuit 24 based on an instruction from a central processing unit 4 of the digital electronic exchange. Then, an ISDN line monitor device 5 is connected to output signal lines 2a from the plural ISDN line interface devices 2 and monitors all the channels of the arbitrary ISDN line 1a. Thus, when monitoring the desired ISDN line, it is not necessary to move the monitor device and to switch the connection, and maintenance is made efficient.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an ISDN line monitoring system in a digital electronic exchange that accommodates ISDN lines.

[Conventional technology]

Conventionally, when monitoring an ISDN line in this type of exchange, a line monitor device 8 is installed between the line to be actually monitored, that is, the ISDN terminal 1 and the interface device 7, as shown in FIG. Ta.

[Problem to be solved by the invention]

In the conventional ISDN line monitoring method described above, the ISD
Since a line monitor device must be installed between the N terminal and the ISDN line interface device, the line monitor device must be moved to the location of the line to be monitored, which is inconvenient in terms of maintenance and operation. .

[Means to solve the problem]

The ISDN line monitoring method of the present invention provides the ISDN line interface device of a digital electronic exchange that accommodates the ISDN terminals of the basic interface.
a first means for multiplexing two B-channel and one D-channel signals to be transmitted and received from a terminal; and transmitting the multiplexed signal by the first means based on instructions from a central processing unit of the digital electronic exchange. an ISDN line monitor device is connected to the output signal line from the plurality of ISDN line interface devices; and the ISDN line monitor device monitors all channels of an arbitrary ISDN line. be.

Further, the ISDN line monitoring system of the present invention includes a first interface system that multiplexes two B channel signals and one D channel signal to be sent to and received from the ISDN terminal in an ISDN line interface device of a digital electronic exchange that accommodates an ISDN terminal of a basic interface. a second means for comparing a control instruction line number included in a control signal from an ISDN line monitor device with a predetermined line number of the ISDN line interface device; and a comparison by the second means. a third means for controlling transmission of the signal multiplexed by the first means based on the result of the plurality of said I
The ISDN line monitor device is connected to the output signal line from the SDN line interface device; the ISDN line monitor device monitors all channels of a given ISDN line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a relay system diagram showing one embodiment of the present invention. Referring to FIG. 1, the ISDN terminals 1 each have an ISDN
It is housed in the line interface device 2. ISDN
A multiplexed monitor signal of the connected ISDN line 1a is output from the line interface device 2, and the output line 2a is connected to the ISDN line monitor device 5 after connecting multiple ISDN line interface devices 2. There is. When it is desired to monitor any ISDN line 1a, by inputting the line number from the maintenance console 6, the central processing unit 4 gives a multiplex signal output instruction to the corresponding ISDN line interface device 2. As a result, the ISDN line monitor device 5 selects the desired line 1.
A can be monitored.

In the ISDN line interface device 2, as shown in the detailed configuration in FIG.
The signal from S/T point IFFINTAACE circuit 21RIB
,,B2. Separated into D channel signal, 64Kbps
Call channel B1. B2 is connected to the time division switch 3 via the time division switch interface circuit 22.

Information on the 16 Kbps signal channel D is delivered to the central processing unit 4 via the D channel control circuit 23. S/T
Points B, , B2 . D
The channel transmission and reception signals are further sent to the signal multiplexing circuit 24 and multiplexed. The signal multiplexing circuit 24 outputs a multiplexed signal and a synchronous clock signal, and the output of these signals is controlled by the output control circuit 25 in response to instructions from the central processing unit 4.

FIG. 3 shows an example of the structure of the multiplexed signal. In the figure, F is a synchronization flag signal, B1. B2. D is a channel signal from ISDN terminal 1, and Bt'+B2'D' is a channel signal to ISDN terminal 1.

Referring to FIG. 4 showing the detailed configuration of the ISDN line monitor device 5, a plurality of multi-connected ISDN [i! A multiplexed signal and a synchronized clock signal sent from one of the interface devices 2 are received by a receiving circuit 56, and separated into signals for each channel by a signal separating circuit 51. Signal channel D is analyzed by a D channel analysis circuit 55 and displayed on an output device such as a CRT in a form that is easy for the operator to understand. In addition, the switching circuit 52 also uses the communication channel B1.
．． Depending on whether B2 is an audio signal or a data signal,
Later stage audio monitor circuit 53 and data signal monitor circuit 5
Switch the connection to 4. If it is a voice, it is monitored by an audio device such as a speaker, and if it is a data signal, it is monitored by an output device such as a CRT.

Next, referring to FIG. 5 showing another embodiment of the present invention,
Each ISDN terminal 1 is accommodated in an ISDN line interface device 2. The ISDN line interface device 2 outputs a multiplexed monitor signal of the connected ISDN line 1a, and the output line 2a is connected to multiple ISDN lines.
I while connecting multiple DN line interface devices 2.
It is connected to the SDN line monitor device 5. In this embodiment, when you want to monitor any ISDN line 1a, by inputting the line number from the ISDN line monitor device 5, you can monitor multiple ISDN lines from the ISDN line monitor device 5.
A multiplex signal output instruction is output to the DN line interface device 2 via the signal line 5a. Based on this signal, the corresponding ISDN line interface device 2 performs output control of the multiplexed signal. This allows the ISDN line monitoring device 5 to monitor the desired line 1a.

ISDN line interface device 2 in this embodiment
has the configuration shown in FIG. 6, and the same components as those of the interface device 2 shown in FIG. 2 are designated by the same reference numerals. The output control circuit from the ISDN line monitor device 5 is received by the signal receiving circuit 2θ, and compared with the signal from the line number storage circuit 28 by the line number comparison circuit 27, and only when they match, the output control circuit 25 controls the output.

FIG. 7 shows a configuration example of an output control signal output from the ISDN line monitor device 5 to the ISDN line interface device 2. LINE No. specifies the desired line number, and C specifies output on/off control.

The ISDN line monitor device 5 is constructed as shown in FIG. 8, and the same components as in FIG. 4 are indicated by the same reference numerals. When selecting the line 1a to be monitored, input the line number from the input device KEY to all ISDN line interface devices 2 connected from the output control signal sending circuit 58 via the signal sending circuit 57. An output control signal is sent out.

〔Effect of the invention〕

As explained above, according to the present invention, a monitor signal is multiplexed by an ISDN line interface device for accommodating an ISDN terminal, multiplexed signal outputs are multi-connected to a plurality of ISDN line interface devices, and any ISDN line interface can be connected to an arbitrary ISDN line interface. By sending the device status signal to the ISDN line monitoring device, it is possible to easily monitor a desired ISDN line without moving the monitor device or changing connections, and efficiency in maintenance and operation can be improved.

[Brief explanation of the drawing]

1, 2, 3, and 4 show one embodiment of the present invention, and FIGS. 5, 6, 7, and 8 show other embodiments of the present invention. The figure shown in FIG. 9 is a diagram showing a conventional example. 1 ・ISDN terminal, 1a...4SDN line, 2
... I SDN line interface device, 3... Time division switch, 4-way central processing unit, 5... ISDN line monitor device, 6... Maintenance console, 21...
S/T point interface circuit, 22... Time division switch interface circuit, 23... D channel control circuit, 24... Signal multiplexing circuit, 25... Output control circuit,
26... Signal receiving circuit, 27... Line number comparison circuit, 28... Line number storage circuit, 51... Signal separation circuit, 52... Signal switching circuit, 53... Audio monitor circuit, 54... Data signal monitor circuit, 55... D channel analysis circuit, 56... Signal receiving circuit, 57...
Signal transmission circuit, 58... Output control signal transmission circuit.

Claims (1)

[Scope of Claims] 1. A first means for multiplexing two B channel signals and one D channel signal to be sent to and received from the ISDN terminals to an ISDN line interface device of a digital electronic exchange that respectively accommodates the ISDN terminals of the basic interface. and second means for controlling transmission of the signals multiplexed by the first means based on instructions from a central processing unit of the digital electronic exchange; output signal lines from the plurality of ISDN line interface devices. An ISDN line monitoring method is characterized in that an ISDN line monitor device is connected to the ISDN line monitor device; and all channels of a given ISDN line are monitored by the ISDN line monitor device. 2. The ISDN line interface device of the digital electronic exchange that accommodates the ISDN terminal of the basic interface has two B channels for transmitting and receiving with the ISDN terminal;
a first means for multiplexing two D channel signals;
a second means for comparing a control instruction line number included in a control signal from an N line monitor device with a predetermined line number of the ISDN line interface device;
a third means for controlling the transmission of the signals multiplexed by the first means based on the comparison result by the means; and a third means for controlling the transmission of the signal multiplexed by the first means; an ISDN line monitoring method, characterized in that all channels of an arbitrary ISDN line are monitored by the ISDN line monitoring device.