Basic System Configuration Guide System Management
Edition: 01 3HE 11010 AAAC TQZZA 197
6.1.2 System Time
The 7705 SAR routers are equipped with a real-time system clock for time-keeping
purposes. When set, the system clock always operates on Coordinated Universal
Time (UTC), but the 7705 SAR software has options for local time translation as well
as system clock synchronization.
System time parameters include:
• Time Zones
• NTP
• SNTP Time Synchronization
• PTP
• Time-of-Day Measurement (ToD-1pps)
• GNSS
• CRON
6.1.2.1 Time Zones
Setting a time zone in the 7705 SAR allows for times to be displayed in the local time
rather than in UTC. The 7705 SAR has both user-defined and system-defined time
zones.
A user-defined time zone has a user-assigned name of up to four printable ASCII
characters that is different from the system-defined time zones. For user-defined
time zones, the offset from UTC is configured as well as any summer time
adjustment for the time zone.
The 7705 SAR system-defined time zones are listed in Table 23, which includes both
time zones with and without summer time correction.
Table 23 System-defined Time Zones
Acronym Time Zone Name UTC Offset
Europe:
GMT Greenwich Mean Time UTC
BST British Summer Time UTC +1
IST Irish Summer Time UTC +1*
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