| 摘要 |
PURPOSE:To quicken the transmission speed of a cell data by converting a data speed of an input cell data into a low speed and then accessing a memory. CONSTITUTION:A speed conversion 1 converts a data of an input cell into a data of a lower speed than the input cell speed, extracts a data equal to a header word length from an optional position, accesses a memory in an error check code arithmetic means 2 sequentially, and the error check code arithmetic means 2 generates a comparison error check code. The error check code arithmetic means 2 generates a relevant comparison error check code one by one word till an error check code in an input cell coincident with the comparison error check code. A cell frame generating means 3 regards it that cell synchronization is established when the coincidence is established and outputs an input frame at that time as a cell frame.
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