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US 5,940,456 AGranted
Synchronous plesiochronous digital hierarchy transmission systems
AssigneeUT Starcom, Inc.
InventorsRobert Xuebo Chen, William Xiao-Qing Huang
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Abstract
A system that allows multiple bundles of plesiochronous digital hierarchy (PDH) payload data streams to be synchronously trasmitted from one point to another is described. The system multiplexes multiple stages of the PDH using a single clock signal. This removes the need to perform stuffing and de-stuffing of the data streams at the various stages of the multiplexing.
Claims10
A communication system comprising:
- means for accepting at least two plesiochronous digital hierarchy (PDH) input signals, the PDH input signals to be combined through at least two stages of the plesiochronous digital hierarchy;
- a dock;
- a first converting means for converting said two plesiochronous digital hierarchy input signals into a first and a second set of parallel data, said two sets of parallel data being synchronized by said clock through said at least two stages of the plesiochronous digital hierarchy without stuffing bits for synchronizing the first and second set of parallel data;
- and
- an encoder for accepting said first and said second sets of parallel data and for generating a serial output representative of said two PDH input signals.
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Dependencies are inferred from the claim text.