Time Protocol (RFC 868) allows the managed device to
synchronize its clock with a Time Server.
When read, the agent will report notSupported(1) if this
object is not supported.
When set to enabled(3), it will cause the agent to contact
the nbsCmmcSysTimeServer (if valid) via rdate to obtain
the current time.
disabled(2) is a deprecated, legacy value. Setting this
value will cause a SET error.