Appeal No. 2004-0070
Application No. 10/047,529
BACKGROUND
The invention is directed to digital subscriber line (xDSL) communications, and in
particular apparatus and methods for testing whether a telephone line can support
xDSL communications. Claim 10 is reproduced below.
10. A method for local loop integrity testing of digital subscriber line (xDSL)
communications, the method comprising:
initiating a test of a local loop telephone line by transmitting a test
signature from a first point on the local loop telephone line, the local loop
telephone line forming a continuous electrically conductive path without
intermediate components between the first point and a second point;
receiving the test signature at the second point on the local loop
telephone line;
evaluating the received test signature at the second point to determine
whether the local loop telephone line can support xDSL communication; and
indicating whether the telephone line can support xDSL communication.
The examiner relies on the following references:
Soderberg et al. (Soderberg) 5,066,139 Nov. 19, 1991
Bliven et al. (Bliven) 5,111,497 May 5, 1992
Bjork et al. (Bjork) 5,128,619 Jul. 7, 1992
Siu et al. (Siu) 5,528,661 Jun. 18, 1996
Emerson et al. (Emerson) 5,553,059 Sep. 3, 1996
Feiner et al. (Feiner) 5,579,369 Nov. 26, 1996
Needle 5,864,602 Jan. 26, 1999
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