The cellular interface can obtain the system time when the config>port>cellular>sync-system-time command is enabled. When the command is enabled and the corresponding PDN interface goes up, system time is retrieved and set on the system.
If NTP or SNTP is configured when the sync-system-time command is enabled, there is no time source precedence and either process can update the system time at its own discretion. Do not enable NTP or SNTP when the sync-system-time command is enabled unless NTP (or SNTP) and the cellular interface are using the same time source.
The cellular interface and the GNSS receiver can be configured concurrently to obtain the system time. When the sync-system-time command is enabled concurrently on the cellular interface and on the GNSS receiver, the GNSS receiver takes priority when it establishes a lock.
When the sync-system-time command is enabled, the system time cannot be set manually.
The sync-system-time command works in conjunction with the following commands:
config>system>time>dst-zone
config>system>time>prefer-local-time
config>system>time>zone
For information about the dst-zone, prefer-local-time, and zone commands, see the 7450 ESS, 7750 SR, 7950 XRS, and VSR Classic CLI Command Reference Guide.