It depends. Is there a voicemail box I can wait for? Around 5-6 rings, I start hoping to hear that so I can hang up and try again (or in rare cases, I might leave an actual voicemail - i know ao many people who don't check theirs though...)

If there is none, and I really wanna get through to someone, then I'll let their phone ring off the hook, especially at work where our users have landlines at their desk. Hey, if you put a phone number on a ticket and then come back and have your boss contact my boss to escalate the ticket, then you better answer your phone when I have follow-up questions about your poorly-written ticket. After ~10 rings, I'll put my phone on speaker and turn the volume down as I turn back to my computer and resume working, the ring barely audible in the background...