If you are arrested, do you have to use the station phone for your one phone call?

Or can you use your own cellphone?

What if no one answers?
What if you call a wrong number—does it count?
What if you have to leave a voicemail—does it count?

Is there a set time frame in which you are free to make your call, or can you use your one call at any time? Can you wait until you know that the person will be available?

Do they have to know who you’re calling?