JPS6348927A - Panel unconnection detecting system - Google Patents

Abstract

PURPOSE:To confirm the presence or absence of mounting of a transmission channel board by receiving and detecting a specific data given in a time slot of an unconnected channel so as to raise an alarm in the transmission/reception system sending each channel data multiplexingly and receiving it demultiplexingly. CONSTITUTION:If the n-th channel of a frame of a transmission station is not connected, a multiplexing panel inserts an all '0' data to a time slot inserted to the n-th channel and the result is sent. Then a data corresponding to the n-th channel is demultiplexed by a demultiplexing panel of a reception station, the data is detected by the all '0' detection circuit 11 of the reception channel panel 10, an alarm representing unmounted n-th channel of the transmission channel panel is raised from an alarm sending circuit 12 to allow the reception side to confirm the presence or absence of the transmission channel mounting.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a function of detecting disconnection of a channel transmitter board of a transmitting station in a digital transmission path and displaying the detected disconnection to a receiving station as a type of alarm.

[Conventional technology]

Conventionally, uninstalled (unconnected) channel transmitter boards could not be detected at the receiving station. Therefore, it was not possible to determine which channel is currently usable. [Problem to be solved by the invention] In the conventional branching described above, since the receiving station cannot determine which channels are currently unusable, You need to check which channels are available.

Therefore, there is a drawback that it takes time and effort to respond to urgent cases.

[Failure to solve the problem]

According to the present invention, when the n-th transmission channel board is removed at the transmitting station, all 0's are inserted in the multiplexing board where the data of the n-th channel is inserted, and the data is sent to the transmission path. Conversely, at the receiving station, the data of the nth channel is separated by a separation board and all 0 data is sent to the receiving channel board.

The receiving channel board uses the all 0 detection function to detect all 0s.
If it is determined that this is the case, an alarm will be issued.

〔Example〕

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

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1 indicates a transmitting station rack, which includes n transmitting channel boards 3, an n channel multiplexing board 5 that multiplexes the output of each channel, and a transmitting board that sends the multiplexed data to a transmission path 9. 7. Reference numeral 2 denotes a receiving station rack, which includes a receiving board 8 for receiving multiplexed data, a separating board 6 for separating received channel multiplexed data into n channels, and n receiving channel boards 4. The transmitting station 1 and the receiving station 2 are connected by a transmission line 9.

FIG. 2 shows the separation board 6 of the receiving station 2 and the n-th receiving channel board.

If the n-th transmission channel board is not connected at the transmitting station, the multiplexing board 5 pushes all log data into the time slot where the data of the n-th channel is inserted, and the multiplexed data including that data is sent to the transmitting board. 7 to the transmission line 9. After that, all 0s of the nth channel are sent to the separation board 6.
data is separated and output to the n-th receiving channel board 10.

At this time, the all 0 detection circuit 11 detects the data,
The alarm sending circuit 12 is controlled to issue an alarm.

〔Effect of the invention〕

As described above, the present invention has the advantage that the receiving station can confirm which transmission channel board of the transmitting station is installed or not based on the 11th report.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a transmission system to which the present invention is applied, and FIG. 2 is a block diagram of a receiving station separation board and receiving channel board shown in FIG. 1. ■...Transmitting station rack, 2...Receiving station rack, 3...n transmission channel boards, 4...
・n reception channel boards, 5... multiplexing board, 6
...Separation board, 7...Transmission board, 8...
...Receiver board, 9...Transmission line, 10...
- Receiving channel board, 11... All 0 detection circuit, 12... Alarm sending circuit, 13... Code conversion circuit. Dojuku I section lθ Kume 2 figure

Claims (1)

[Claims] a transmitting station having a plurality of transmitting channel boards and a multiplexing board that multiplexes output channel data of the transmitting channel boards and to which any of the transmitting channel boards can be connected; and a transmitting station connected to the transmitting station via a transmission path. , in a method for detecting unconnected transmission channel boards in a transmission system comprising a receiving station having a separation board that separates the multiplexed channel data and a plurality of reception channel boards that receive the separated channel data; , when the n-th transmission channel board is not connected in the transmitting station, inserting all '0' data into the time slot in which the n-th channel data is inserted in the multiplexing board and sending it to the transmission path; In the receiving station, the data of the n-th channel is separated by the separation board and sent to the receiving channel board, and the receiving channel board separates the data of the nth channel.
A panel disconnection detection method is characterized in that when 0' detection is performed and it is determined that all 0's are detected, an alarm is issued.