In telecommunications, the term protocol-control information (PCI) has the following meanings:
- 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.
This article incorporates public domain material from Federal Standard 1037C. General Services Administration. Archived from the original on 2022-01-22.
References
"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 ↩
Boait, P.; Neville, G.; Norris, R.; Pickman, M.; Walmsley, J. (1988). "Definition of OSI Terms" (PDF). In Tolhurst, M. (ed.). Open Systems Interconnection. Macmillan Computer Science Series. London: Palgrave. doi:10.1007/978-1-349-10306-5. ISBN 978-0-333-46803-6. Archived (PDF) from the original on 2022-10-09. 978-0-333-46803-6 ↩
"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 ↩
"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 ↩