Telephone subscriber loop test system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 25, 1989
Grant Date -
N/A
app pub date -
Jul 22, 1988
filing date -
Jul 22, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of locating faults in a telephone system including the steps of connecting antiparallel rectifying switches (ARS's ) that inhibit alternating current (A.C.) flow in one direction but not the other between subscriber equipment and respective telephone company lines, applying an A.C. test signal to a telephone company line and measuring a resulting signal, and determining whether a fault is on the telephone company line or customer equipment based upon the resulting signal. Also disclosed is an ARS that includes a first input and output, a second input and output, and paths between respective inputs and outputs providing low turn-on thresholds in one direction between respective inputs and outputs and high turn-on thresholds in the other direction, the directions of low and high being the same for both sets of inputs and outputs.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully