VRS Rules

Hello!

Deaf here.

What is the appropriate amount of time for an interpreter to hold a side convo with the Deaf making the VRS call? I am needing to set some rules up for my students so they are not putting interpreters in awkward positions. Some seem to allow it to keep going. For clarification, this is not during a hold time, this is after the call isn't successful. (Like when they call goes to voicemail & they hang up.) Also, is it appropriate for the interpreter to ask questions about what they see in the background? For example, "Oh wow. Lots of students in your class. All Deaf?" That kind of thing.

Thanks!