TEST SETS FOR TELEPHONE SWITCHING

Brand	Owner	Address	Description
GRIDSCAN	TERADYNE, INC.	600 Riverpark Drive North Reading MA 01864	TEST SETS FOR TELEPHONE SWITCHING SYSTEMS;
	Where the owner name is not linked, that owner no longer owns the brand

Technical Examples

A method and apparatus for testing telephone sets to determine their sound quality comprising a system for repeatedly applying a sequence of pulse tones to a test telephone where the respective tone frequencies are different and within the normal human voice range.