Protocol-control information

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In telecommunication, the term protocol-control information or PCI has the following meanings:[1][2][3][4]

  1. The queries and replies among communications equipment to determine the respective capabilities of each end of the communications link.
  2. 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.

References

  1. ↑ "CCITT X.200 – Information technology – Reference Model of Open Systems Interconnection for CCITT Applications". International Telecommunication Union (ITU). 1988. https://www.itu.int/rec/dologin_pub.asp?lang=e&id=T-REC-X.200-198811-S!!PDF-E&type=items. 
  2. ↑ "Definition of OSI Terms". Open Systems Interconnection. Macmillan Computer Science Series. London: Palgrave. 1988. doi:10.1007/978-1-349-10306-5. ISBN 978-0-333-46803-6. https://link.springer.com/content/pdf/bbm%3A978-1-349-10306-5%2F1.pdf. 
  3. ↑ "ITU-T X.260 | ISO/IEC 14765 – Information technology – Framework for protocol identification and encapsulation". International Telecommunication Union (ITU). 1996. https://handle.itu.int/11.1002/1000/3293. 
  4. ↑ "Federal Standard 1037C – Telecommunications: Glossary of Telecommunication Terms". General Services Administration – Information Technology Service. 1996. https://www.its.bldrdoc.gov/fs-1037/fs-1037c.htm. 




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