JPH02116237A - Mounting information collecting system - Google Patents

Abstract

PURPOSE:To minimize the number of information collecting lines and the number of the pins of connectors and to simplify the connection of a backboard by collecting the mounting information of a channel unit from the detecting condition of a pulse detecting means. CONSTITUTION:An encoding decoding pulse is sent from a common unit to respective channel units and the sent timing is different according to respective channel units. At this time, a pulse returning means 6 is provided at a channel unit and a pulse detecting means 5 is provided at a common unit, and the inputted encoding decoding pulse is sent through a pulse returning means to a pulse detecting means. The pulse detecting means 5 discriminates the pulse position of the encoding decoding pulse, namely, the presence and absence of the mounting of the channel unit from a detecting time. Thus, since the number of the information collecting lines to connect respective channel units and the common unit and the number of the pins of the connector may be respectively 1, the connection of the backboard is simplified.

Description

[Detailed Description of the Invention] [Summary] For example, regarding a mounting information collection method used when collecting mounting information of a channel unit in a PCM 24 channel transmission device, the number of information collection lines and the number of connector bins are minimized. , with the aim of simplifying the connection of the bank board, by transmitting the encoded signal within the time slot specified by the input encoding/decoding pulse, or extracting the encoded signal from the specified time slot. When the implementation information collecting section collects information as to whether or not a channel unit to be decoded is installed, a pulse return means (6) for returning the code/decoding pulse is provided to each channel unit. A pulse detection means (5) is provided for detecting the code/decoding pulse sent back to the implementation information collection section,
Mounting information of the channel unit is collected from the detection state of the pulse detection means.

[Industrial application field]

The present invention relates to a mounting information collection method used when collecting channel unit mounting information in, for example, a PCM 24 channel transmission device.

FIG. 3 shows a channel bank configuration diagram (in the case of 24 channels), and FIG. 4 shows an operation explanatory diagram of FIG. 3.

The operation shown in FIG. 3 will be explained below with reference to FIG.

First, the codes and decoding corresponding to the #1 channel unit to #24 channel unit are performed from the transmitting signal code/decoding pulse generator 11 and the received signal code/decoding pulse generator in the common unit shown in FIG. 4th pulse
The data are sent out sequentially as shown in Figure - ■.

Therefore, for example, the encoder/decoder (hereinafter abbreviated as C0DEC) 131 in the #1 channel unit performs the following operation while the #1 encoder/decoder pulse is being input, that is, during the specified time slot. 8-bit 1.544 Mb/s audio signal using the 1.544 Mb/S transmitter clock shown in
It is converted into a PCM signal of Mb/s and sent.

Each C0DEC also converts the audio signal into a PCM signal and sends it out during its designated time slot in the same way as above, but these 24 PCM signals are wired-ORed, and the PCM signal as shown in Figure 4-■ is transmitted. A primary group multiplexed signal is obtained.

Note that decoding is an operation opposite to the above.

Next, when there is no response when collecting data on the operating status of each channel unit using the monitoring part (not shown) in the common unit, is it because the channel unit is not installed in the device and there is no response? , or if it is mounted but there is no response due to a failure, mounting information is required. To obtain this information, connect the bank board by minimizing the number of information collection lines and the number of connector pins. It is necessary to simplify the process.

[Conventional technology]

FIG. 5 shows a configuration diagram of a conventional example.

As shown in the figure, each channel unit has a ground air return pattern 31 on its built-in printed board.

For example, when the #1 channel unit 3 is installed in the device, the earth air supplied to this channel unit is transferred to the earth air through the earth air return pattern, the return line, and the corresponding pin of the connector 22 of the common unit 2. It is added to the detection circuit 21.

A corresponding ground air detector (not shown) in the ground air detection circuit detects ground air and collects information that the #1 channel unit is installed. Thereafter, the state of the ground air is similarly detected for other channel units, and mounting information indicating whether or not they are mounted is collected.

[Problem to be solved by the invention]

As mentioned above, in order to transmit the presence or absence of earth air indicating whether or not the channel unit is installed, each channel unit has a pattern for earth air return, and the common unit has 24 earth air detectors and a 24-pin connector 22. At the same time, a total of 24 information collection lines must be wired on the bank board between the common unit and each channel unit.

That is, since the number of information collection lines and the number of pins of the connector are large (24), there is a problem that the connection of the bank board becomes complicated.

An object of the present invention is to minimize the number of information collection lines and the number of connector pins, thereby simplifying the connection of bank boards.

[Means to solve problems]

FIG. 1 shows a block diagram of the principle of the present invention.

In the figure, 6 is a pulse return means for returning the code/decoding pulse, and 5 is a pulse detection means for detecting the returned code/decoding pulse.

Then, each channel unit is provided with a pulse return means, and the mounting information collection section is provided with a pulse detection means, and the mounting information of the channel unit is collected from the detection state of the pulse detection means.

[Effect]

As mentioned above, encoding/decoding pulses are sent to each channel unit from a common unit.

As shown in Figure 4-0, the timing at which signals are sent differs for each channel unit.

Therefore, in the present invention, the channel unit is provided with a pulse return means 6, and the common unit is provided with a pulse detection means 5, and the input encoded/decoded pulse is sent to the pulse detection means via the pulse return means.

The pulse detection means 5 detects the pulse position of the encoding/decoding pulse,
That is, it is determined from the detection time whether the channel unit is installed or not.

This simplifies the connection of the backboard because the number of information collection lines and the number of pins of the connector connecting each channel unit and the common unit are only one each.

Here, the open collector transistor circuit 61 represents a component of the pulse return means 6, and the pulse detector 51 represents a component of the pulse detection means 5. The operation shown in Figure 2 will be explained below, but since the operation of each channel unit is the same, 11
This will be explained using a channel unit as an example.

First, the open collector transistor circuit (hereinafter abbreviated as open collector circuit) of each channel unit has a collector open state when not in operation, so
Even if several open collector circuits are connected to one information collection line, they will not affect each other.

Next, when the corresponding code/decoding pulse is input to the open collector circuit 61, this circuit is turned on and is passed through the 11 information collection lines to the pulse detection circuit 5 in the common unit.
It will be returned to 1.

The pulse detection circuit 51 detects the presence or absence of the returned code/decoding pulse in synchronization with the transmission timing cycle of the code/decoding pulse, and detects 1 if the code/decoding pulse is present, and O if the pulse is absent. Output as result.

Then, such operations are performed for all channel units, and the detection results are stored in a memory (not shown).
By updating the retained detection results, the latest mounting status of the channel unit can be accurately grasped. Note that since only one information collection line is required, the number of pins of the connector 52 may be one.

That is, the number of information collection lines and the number of connector pins can be minimized, and the connection of the bank board can be simplified.

〔Effect of the invention〕

As described above in detail, the present invention has the advantage that the number of information collection lines and the number of connector pins can be minimized, and the connection of the backboard can be simplified.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the principle of the present invention. FIG. 2 is a configuration diagram of an embodiment of the present invention, Figure 3 is a channel bank configuration diagram. Fig. 4 is an explanatory diagram of the operation of Fig. 3; FIG. 5 shows a configuration diagram of a conventional example. In the figure, 5B pulse detection means; ■

Claims (1)

[Claims] A channel unit is implemented that transmits a coded signal within a time slot specified by an input code/decoding pulse, or extracts and decodes a coded signal from a specified time slot. When the implementation information collection section collects information on whether or not the encoding/decoding pulse is sent back to the implementation information collection section, a pulse return means (6) is provided to send back the encoding/decoding pulse to each channel unit. A mounting information collection system characterized in that a pulse detection means (5) for detecting pulses for encoding/decoding is provided, and mounting information of a channel unit is collected from the detection state of the pulse detection means.