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AssigneeHitachi, Ltd.
InventorsToshiki Sugawara, Masaki Ohira, Yukio Nakano, Takashi Mori
Estimating the term…
In a synchronous multiplex network including a plurality of multiplex transmission apparatuses, an overhead is passed through intervening multiplex transmission apparatuses such that administration and maintenance operation information is transmitted and received through the overhead between arbitrary multiplex transmission apparatuses. The multiplex transmission apparatus receives a multiplexed signal comprising a payload having a plurality of main signals multiplexed therein and overhead bytes including a plurality of administration and maintenance operation information, performs termination processing for the administration and maintenance operation information and transmission processing for the payload, thereafter converts the multiplexed signal into a different multiplexed signal comprising a payload which has been processed for transmission and a plurality of administration and maintenance operation information, and transmits the different multiplexed signal. The multiplex transmission apparatus comprises an overhead passing processing circuit composed of a circuit for extracting predetermined administration and maintenance operation information from the received multiplexed signal, a crossconnecting circuit for crossconnecting information extracted by the extraction circuit stage, and an insertion circuit for inserting an output of the crossconnecting circuit into a predetermined location in the overhead of the multiplexed signal to be transmitted.
A multiplex transmission apparatus for receiving a first multiplexed signal comprising a first payload having a plurality of main signals multiplexed therein and a first overhead including a plurality of first maintenance information associated with administration and maintenance operations, performing termination processing for said first maintenance information and transmission processing for the main signals in said first payload, thereafter converting said first multiplexed signal into a second multiplexed signal comprising a second payload having multiplexed therein said main signals which have been processed for transmission, and a second overhead bytes including a plurality of second maintenance information associated with the administration and maintenance operations, said second maintenance information to be output to a far end communication apparatus, and transmitting said second multiplexed signal;
Dependencies are inferred from the claim text.