G.810: Definitions and terminology for synchronization networks G.811: Primary reference clocks G.812: Slave clocks G.813: SDH equipment slave clocks (SECs)
GR-378-CORE: Generic Requirements for Timing Signal Generators GR-436-CORE: Digital Network Synchronization Plan GR-1244-CORE: Clocks for the Synchronized Network GR-2830-CORE: Primary Reference Sources