for any office hours/break time schedules defined for DN object generic rule is:
if HoursType is set to OfficeHours or OutOfOfficeHours
this schedule is referencing the schedule defined for Tenant (office hours/break time)
For ExternalLineRule - OfficeHours or OutOfOfficeHours references Tenant office schedule
For the property AwayRoute, office hours are defined by DN as described above.
public RuleHours HoursType { get; set; }