Orolia Spectracom EC20S - Maintenance and Repair Safety

Spectracom EPSILON CLOCK MODEL EC20S
iv User’s Manual
8.1 Ethernet Port 22
8.2 Network Services 23
8.2.1 DHCP Client ................................................................................................................................................. 23
8.2.2 HTTP SERVER............................................................................................................................................. 23
8.2.3 SNMP SERVER ............................................................................................................................................ 23
8.2.4 NTP SERVER ............................................................................................................................................... 23
8.2.5 TELNET SERVICE ...................................................................................................................................... 24
8.2.6 FTP SERVICE .............................................................................................................................................. 24
8.2.7 ICMP SERVICE ........................................................................................................................................... 24
8.2.8 Monitoring the EC20S by means of nETWORK SERVICES ...................................................................... 24
9. SYNCHRONIZATION SOURCES ..................................................................................................... 25
9.1 Multi-GNSS Synchronization Source 25
9.2 External 1PPS Synchronization Source 26
9.3 External NMEA Datation Source 28
9.4 Synchronization Sources Monitoring 28
10. OPERATIONAL TASKS .................................................................................................................... 28
10.1 Selection of the Synchronization Source 28
10.2 Disciplining Algorithm – SFN Conditions 29
10.3 Synchronization Signals Distribution 31
10.3.1 Start-up sequence detail................................................................................................................................. 32
10.3.2 Short loss of the GNSS source sequence detail ............................................................................................. 33
10.3.3 Source change sequence detail ...................................................................................................................... 34
10.3.4 Holdover sequence detail .............................................................................................................................. 35
11. SIGNALLING INTERFACES ............................................................................................................. 36
11.1 Visual Signalling 36
11.2 Alarms Signaling 37
11.2.1 Urgent Alarms ............................................................................................................................................... 38
11.2.2 Non-Urgent Alarms ....................................................................................................................................... 38