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Protocol-control information
From Wikipedia, the free encyclopedia
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In telecommunications, the term protocol-control information (PCI) has the following meanings:[1][2][3][4]
- The queries and replies among communications equipment to determine the respective capabilities of each end of the communications link.
- For layered systems, information exchanged between entities of a given layer, via the service provided by the next lower layer, to coordinate their joint operation.
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References
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