 GNSS Service Centre (for the Galileo GNSS system): https://www.gsc-europa.eu/ Chapter 4 3GPP: https://www.3gpp.org/ 3GPP Release 15: https://www.3gpp.org/release-15 3GPP Release 16: https://www.3gpp.org/release-16 3GPP Release 17: https://www.3gpp.org/release-17 CPRI: http://www.cpri.info/ ETSI: https://www.etsi.org/ ETSI NFV: https://www.etsi.org/technologies/nfv IEEE: https://www.ieee.org/ IEEE 802: https://www.ieee802.org/ IEEE TSN Task Group: https://1.ieee802.org/tsn IEEE P1588 Working Group, Active Projects: https://sagroups.ieee.org/1588/active-projects/ IETF: https://www.ietf.org/ IMT-2020: https://www.itu.int/en/ITU-R/study-groups/rsg5/rwp5d/imt-2020/Pages/default.aspx ITU: https://www.itu.int MEF: https://www.mef.net/ oneM2M: https://www.onem2m.org/ O-RAN: https://www.o-ran.org/ O-RAN Software Community: https://o-ran-sc.org/ O-RAN specifications: https://www.o-ran.org/specifications TICTOC: https://tools.ietf.org/wg/tictoc/ TIP: https://telecominfraproject.com/ TIP OpenRAN, Telecom Infra Project OpenRAN: https://telecominfraproject.com/openran/ Chapter 5 ANSI: https://www.ansi.org ETSI: https://www.etsi.org ITU: https://www.itu.int Chapter 6 ANSI: http://www.ansi.org ETSI: http://www.etsi.org ITU: https://www.itu.int Chapter 8 Alliance for Telecommunications Industry Solutions (ATIS): https://www.atis.org/ ITU-T Study Group 15 - Networks, Technologies and Infrastructures for Transport, Access and Home: https://www.itu.int/en/ITU-T/about/groups/Pages/sg15.aspx O-RAN Alliance: https://www.o-ran.org/ Telcordia, The Generic Requirement (GRs) Development Process (now a division of Ericsson). https://telecom- info.njdepot.ericsson.net/site-cgi/ido/docs2.p1?ID=199178067&page=home Chapter 9 Internet Engineering Task Force (IETF) Bryant, S. and P. Pate. "Pseudo Wire Emulation Edge-to-Edge (PWE3) Architecture." IETF, RFC 3985, 2005. https://tools.ietf.org/html/rfc3985 Malis, A., P. Pate, R. Cohen, and D. Zelig. "Synchronous Optical Network/Synchronous Digital Hierarchy (SONET/SDH) Circuit Emulation over Packet 