Over the phone Interpretation

Over the phone or Telephone Interpretation is a type of consecutive interpretation in which two people who speak different language are talking through  a third person who listens first one person and waits until he/she finishes the phrase or statement and then translate it to the second person and vice versa.

This is often used to provide costumer services, healthcare or public safety. United States uses this type of interpretation for federal courts.

Videos and links:

Over the Phone Interpretation (OPI) 

Over the Phone Interpreting

Over the Phone Interpretation Services

Optimal Phone Interpreters