Qualifying telephone lines for data transmission

Details Qualifying telephone lines for data transmission Qualifying telephone lines for data transmission

2006-03-14

2006-03-14

Tran, Quoc (Department: 2643)

Telephonic communications

Diagnostic testing, malfunction indication, or electrical...

Of data transmission

C379S024000, C379S022020, C379S022000, C379S030000

Reexamination Certificate

active

07012991

ABSTRACT:
The method assesses the suitability of customer telephone lines (12, 13, 14) for data transmission. The method includes selecting a telephone line having tip and ring wires by means of a computer (30) and switch (15), and electrically connecting the tip and ring wires together at a test access (29) adjacent one end of the selected line to produce a common mode configuration. Single-ended electrical measurements are performed on the wires in the common mode configuration by a measurement unit (27) connected to the test access (29) to determine an electrical property of the wires from the measurements.

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