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 Performance monitor system, transmission device and performance monitor method of transmission line

Details
Inventors: Kusano, Toshihiko;
Assignee: NEC Corporation (Tokyo, JP)
Primary Examiner: Hsu; Alpus H.
Assistant Examiner:
Attorney, Agent or Firm: Young & Thompson

The present invention is a transmission system with a performance monitor function. The system has an end office, an opposite office located opposite the end office and an intermediate office located between the end office and the opposite office. In the transmission system each of the end office, the opposite office and the intermediate office has a transmitter/receiver for transmitting/receiving information and a performance monitor for monitoring performance of a transmission line. The intermediate office has a switch for switching lines and a bypass for bypassing the switch and for transmitting/receiving a signal to/from an adjacent office while the performance monitor is operating.

DETAILED DESCRIPTION It is an object of the present invention to provide a novel transmission device with a performance monitoring function which readily and fully monitors the performance of unconnected lines as well as lines connected between transmission devices.
The transmission device with the performance monitor function of the present invention may comprise an end office transmitter-receiver, an opposite exchange transmitter-receiver located on the opposite side of the end office transmitter-receiver and an intermediate exchange located between the end office transmitter-receiver and the opposite exchange transmitter-receiver.
It is a further object of the present invention to remove the above-mentioned faults in the conventional device.
To this end, the transmission device with the performance monitor function of this invention comprises the performance monitor devices in the end office transmitter-receiver.
the opposite exchange transmitter-receiver and the intermediate exchange transmitter-receiver The intermediate exchange comprises bypassing means for bypassing the line connection section therein and transmits/receives a signal to/from the adjacent transmitter-receiver while the performance monitor device is operating.
More concretely, the transmission device with the performance monitor function of this invention comprises the end office transmitter-receiver for monitoring performance, the opposite exchange transmitter-receiver located on the opposite side of the end office transmitter-receiver part and the intermediate exchange transmitter-receiver located between the end office transmitter-receiver part and the opposite exchange transmitter-receiver part and comprising the line connection section for line connection.
Moreover, the end office transmitter-receiver comprises the performance measurement signal transmission section wherein the forward path performance monitor information including the performance monitor information and the forward route information is inserted in the forward path transmission data and transmitted to the above-mentioned adjacent intermediate exchange transmitter-receiver


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