Find uniques based on parts of date field and parts of a string field

Hi Community

I have a dataset with incidents for Network Links.

It contains the Router Names and the Ticket created time. The network link can have 1 to 3 routers. If all of the routers are down at the same time I need to mark it as Full outage:

Example:

Router Name                                        Ticket                       Create Date

The name is unique up to the numbers (Italic)

The date is unique up to the hour. (italic)

Is there any formula available to create a new field based on these data ?

Many thanks in advance

Steffen