11.   The relay system is viewed as a communications lifeline for people who are hearing-impaired.

12.   The relay system was first used during limited hours or for certain types of calls, such as business communications.

13.   Their electronic relay system fits into a two-inch cube that is attached to the speedometer.

14.   The Defense Department uses the airwaves space for satellite control stations, tactical radio relay systems, air combat training operations and other functions.

15.   The Stolice relay system links much of Serbia and Bosnian Serb-held territories to the outside world by telephone.