JPS60192439A - How to monitor the state of disconnection of the communication path unit - Google Patents

Abstract

PURPOSE:To supervise the disconnecting state of each channel unit easily by feeding back a prescribed pulse to a multiplexer via a channel unit and using the feedback signal to supervise the disconnecting state of the said channel unit. CONSTITUTION:CH pulses P0-P4 corresponding to CH units 3(0)-3(4) are outputted from a multiplex circuit 4 in a prescribed order. When the said CH units 3(0)-3(4) are loaded in the normal state, while the CH pulses P0-P4 are inputted to the CH units 3(0)-3(4), the pulses pass through the respective gate circuits 5(0)-5(4) and are fed back to the multiplex circuit 4 via a bus 6. The presence of disconnecting state of any of the CH units 3(0)-3(4) is supervised by detecting the fed back CH pulses P0-P4. As the fed back CH pulses P0-P4, it is discriminated that the unit is inserted in the normal state when the level is, e.g., at low (''L'') level and the unit is disconnected when the level is at high (''H'') level.

Description

[Detailed description of the invention] (a) Technical field of the invention The present invention monitors the withdrawal state of the 9 channel unit.

The present invention relates to a communication path unit removal state monitoring method for controlling an inter-device connection procedure signal for transmitting a PCM data signal based on the monitoring result.

(b) Background of the Technology With the development of information processing technology, many information processing systems have been introduced that collect data from remote locations at a center and process it all at once. Furthermore, in recent years, as its usage has become more sophisticated and complex, the PCM transmission method, which transmits a large amount of information at high speed, accurately, and at once, has come to play an important role.

In this PCM transmission device, especially a time division multiplexing PCM transmission device, one sampling period (one period of the output waveform when transmitting data, 9 For example, in the case of 24 communication channels, 1/8 KHz = 1
25 ps), a plurality of communication path (hereinafter referred to as CI) pulses and one synchronization pulse are inserted.

Each C consists of one signal pulse (for dialing) and seven voice encoding pulses.

By monitoring and controlling the various pulse signals mentioned above, high-speed and accurate information transmission is achieved, but by introducing the latest integrated circuit technology, it is possible to develop a method for monitoring and controlling various pulse signals that is adapted to these methods. requested.

(c) Prior art and problems Next, as a conventional method for monitoring and controlling various pulse signals, C
□Explaining the unit removal status monitoring method as an example with reference to the drawings.

Figure 1 is a transmission system configuration diagram, Figure 2 is a time division multiplex PC
In the M output waveform diagram, (A) shows one sampling period (one frame), and (B) shows the output status of the CI pulse.

In the figure, 1 is an exchange and 2 is a PCM transmission device.

3 is C8, 3 (0) ~ 3 (n) is CH unit, 4
indicate multiplexing circuits, respectively. Note that a is one sampling period (1
(frame), b indicates a signal pulse, C indicates an audio pulse, d indicates a synchronization pulse, ■ indicates a clock pulse, ■ indicates a frame pulse, and PO and PL indicate a CH pulse, respectively. Note that the numbers (1 to 8) in FIG. 2 indicate bit numbers.

FIG. 1 shows an exchange 1. which connects calls between telephones (not shown). pcH transmission equipment W2, which is installed between exchanges 1 and transmits voice and signals in connection with a remote location. PC
CH3 (CHL nit 3 (0
) to 3 (including (n)).

It is comprised of a multiplexing circuit 4 that multiplexes PCM signals from CH3 and sends them out to the transmission path.

Generally, when transmitting and receiving PCM signals between PCM transmission devices W2, a connection procedure signal (a fixed signal that confirms the activation and idle status of the devices to be connected) is exchanged between them. Sends and receives signals.

In this case, 1, for example, CI units 3 (0) to 3 (
If CI unit n) is pulled out for some reason, it is necessary to send a connection procedure signal to the transmission line to close the connection to the corresponding CI unit 3(0) to 3(n).

Conventionally, such connection procedure signals, etc. were centrally controlled by a microprocessor (not shown) in the multiplexing circuit 4, so monitoring of the extraction status of CH units 3(O) to 3(n) was A microprocessor (not shown) in the multiplexing circuit 4 and CI units 3 (0) to 3 (n
) was done using a data bus between However, due to the miniaturization of microprocessors (not shown) and the decentralization of functions (decentralization of risks) due to the recent development of microprocessor (not shown) technology, CH unit 3
(O) to 3(n) are equipped with a microprocessor (not shown), and the connection procedure signal is transmitted to CH unit) 3(0).
~3 (n) Now controlled separately.

Due to the change in the division of functions as mentioned above, C Unit 3 (O
) to 3(n), a new problem has arisen in that it is no longer possible to monitor the extraction status using the conventional data bus.

(d) Purpose of the Invention The object of the present invention is to provide a novel CI unit extraction state monitoring method that solves the above-mentioned problems. The withdrawal status is monitored, and the PC is
C) An object of the present invention is to realize a method for monitoring the state of C) l unit removal, which is capable of controlling an inter-device connection procedure signal for sending an M data signal.

(e) Structure of the invention The present invention provides a PCM that modulates an analog signal with a pulse code.
The channel unit is provided with means for feeding back to the multiplexer a predetermined pulse output from a multiplexing device for multiplexing signals to the channel unit.

The predetermined pulse is fed back to the multiplexing device via the channel unit, and this feedback signal is used.

C) A unit removal state monitoring method characterized in that the removal state of the communication channel unit is monitored, and an inter-device connection procedure signal for transmitting a PCM data signal is controlled based on the result of the monitoring state. I can do it.

(f) Examples of the invention The present invention will be explained below with reference to the drawings.

FIG. 3 shows an embodiment of the method for monitoring the withdrawal state of a CH unit in a PCM transmission device according to the present invention, in which (A) shows a functional block diagram and (B) shows a time chart.

In the figure, 5(0) to 5(n) are gate circuits.

6 each indicate a bus. The same numbers as in Figures 1 and 2 indicate the same contents, and ■ indicates all CI units 3 (0
) to 3(n) are inserted, ■ is CH unit 3 (O) and CB unit 3
CB unit removal information when (3) is removed, P
O to Pn indicate CI pulses, respectively.

This embodiment includes the constituent parts explained in FIG. Gate circuits 5 (O) to 5(
n), and a bus 6 which is a common path for carrying CH unit extraction information to be returned from each CI unit 3 (0) to 3 (n) to the multiplexing circuit 4.

Next, the operation of this embodiment will be explained based on FIG. 3(B). In addition, Fig. 3(B) shows 5CI (units [3(O) to 3(
4)) The case of implementation is shown.

From the multiplexing circuit 4 to each CH unit) 3 (0) to 3 (4
) corresponding CH pulses PO-P4 are output in a fixed order. This CH pulse PO~P4 is applied to each CH unit 3.
(0) to 3 (4) If the corresponding CH Uniso I-3(0) to 3 (4) is inserted in a normal operating state, each gate circuit 5(0) to 5(4)
The signal is returned to the multiplexing circuit 4 via the bus 6. By detecting this returned CI pulse PO~P4, 9C■
Monitor whether or not units 3 (O) to 3 (4) are being pulled out.

The CI pulses PO to P4 to be returned are 2, for example, low (
When it is at the "L" level, it is assumed that it is inserted in a normal operating state, and when it is at the high ("H") level, it is judged that it is in the pulled out state. Since ■ in FIG. 3(B) is at the "L" level, it means that all CH units 3 (0) to 3 (4) are inserted in a normal operating state, and ■ indicates that CH unit 3 ( 0) and CI unit 3 (3) are “H”
level, indicating that CI unit 3 (0) and CI unit 3 (3) are in the pulled out state. Based on this monitoring information, the connection signal output to the transmission path is controlled,
CH units 3 (0), 3 (3) in the pulled out state
) outputs a blocking signal to prevent connection.

(g) Effects of the Invention According to the present invention as described above, a PCM in which control functions such as connection procedure signals with opposing equipment are shared among each communication channel unit.
Even in the case of a transmission device, it is possible to provide a method for monitoring the removal state of each communication path unit in a package by which the removal state of each communication path unit can be monitored.

[Brief explanation of the drawings] Figure 1 is a transmission system configuration diagram, Figure 2 is a time division multiplex PC
The M output waveform diagram and FIG. 3 each show an embodiment of a method for monitoring the CH unit extraction state of a PCM transmission device according to the present invention. In the figure, 1 is an exchange and 2 is a PCM transmission device. 3 is CI, 3 (0) to 3 (n) are CI units,
4 is a multiplexing circuit, and 5(0) to 5(n) are gate circuits. 6 each indicate a bus. <A) CB) p6−−←−−−−J L− P′I

Claims (1)

[Claims] The communication path unit is provided with means for feeding back to the multiplexing device a predetermined pulse outputted from a multiplexing device that multiplexes a PCM signal obtained by modulating an analog signal with a pulse code to the communication path unit, 1. A method for monitoring a pulled-out state of a communication path unit, characterized in that the communication path unit is returned to the multiplexing device via the communication path unit, and the pulled-out state of the communication path unit is monitored based on the feedback signal.