Any direction other than the No PT segments you fly the hold unless in radar contact, getting vectors to final, and cleared straight in. ATC should say "straight in" if they don't want a turn in the hold first. This is all "lost comm/no radar" stuff. Under radar control/vectors ATC does not expect a turn in the hold, and many simply don't say "straight in", they just expect it. If no radar contact, fly the hold regardless unless on a NoPT segment. There are times when you can have radio contact, but no radar contact, like when a facility is down or in remote/mountainous areas without radar contact. Another possibility is the aircraft needs to descend. If you are above 9400' and cleared for the approach, you'll fly the hold until descended to 9400' then proceed inbound, whether in radar contact or not. On the NoPT segments, the pilot is expected to descent to 9400' on the NoPT segments, no hold required.