Jean-Loup Ferrant joined Alcatel in 1975 and worked on analog systems, PCM and digital cross-connects. He has been working on SDH synchronization since 1990 and on SDH and OTN standardization for more than 20 years in ETSI TM1, TM3 and ITU-T SG13 and SG15. He has been rapporteur of SG15 Q13 on network synchronization since year 2001. He was one of the Alcatel-Lucent experts on synchronization in transport networks until he retired in March 2009. He is still rapporteur of SG15 Q13, sponsored by Calnex Solutions, and an active member of ITSF.