At a compulsory reporting points the pilot must report their callsign, position, and altitude.

Solid triangles are non-compulsory reporting points, open (unfilled) triangles are compulsory reporting points.

When the pilot reaches the end of their CTR entry route, they may enter the traffic circuit without an additional clearance.

When the pilot reaches the end of their CTR entry route, they must hold as published (where such a hold exists).

Relative or absolute position of traffic horizontally

Level information

Short description of target, e.g. VFR Traffic, IFR Traffic

Distance to target

When in doubt: Ask another controller who is online.

Look it up in the SOP.

The departure frequency is always Unicom 122.800

I do not need to determine that, that's the pilot's job.

Pilot has to report the current altitude

Pilot has to report the current speed

Pilot has to report that he is overflying the mandatory reporting point (Pflichtmeldepunkt) - e.g. November

Pilot has to report the current heading

Pilot only needs to report overflying when instructed to report it

Pilot never needs to report anything as the controller can see his position and altitude on the radar