| 摘要 |
The invention provides a termination equipment for use in a data network such as a SONET data network. The termination equipment has a data input for receiving a plurality of data frames, each data frame including an overhead component and a payload component. An overhead processor performs a termination operation on the overhead components of the data frames. The overhead processor has a control input to receive control information designating at least one data slot of the overhead component to be preserved during the termination operation. The overhead processor is responsive to the control information to perform a selective termination operation on the plurality of data frames, preserving data in the at least one data slot designated for preservation. The selective termination operation produces an output data stream containing payload data from the payload components of the plurality of data frames and data from the at least one data slot designated for preservation.
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