Method and apparatus for testing telephone sound quality

Details Method and apparatus for testing telephone sound quality Method and apparatus for testing telephone sound quality

2007-06-26

2007-06-26

Tran, Quoc (Department: 2614)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Testing of subscriber loop or terminal

C379S027030, C379S022020, C381S058000

Reexamination Certificate

active

10403252

ABSTRACT:
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.

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patent: 6707886 (2004-03-01), Erving et al.
patent: 6775240 (2004-08-01), Zhang et al.
patent: 2004/0184620 (2004-09-01), Johnson et al.

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