Non-intrusive cable connection monitoring for use in HFC...

Details Non-intrusive cable connection monitoring for use in HFC... Non-intrusive cable connection monitoring for use in HFC...

2005-06-14

2005-06-14

Le, N. (Department: 2858)

Electricity: measuring and testing

Fault detecting in electric circuits and of electric components

For fault location

C324S539000, C375S224000

Reexamination Certificate

active

06906526

ABSTRACT:
A method and an apparatus are employed for individually monitoring the connectivity status of cables connected at a cable modem termination system (CMTS), where the cables conduct upstream and downstream RF communication signals. The monitoring is self-contained within the CMTS. The monitoring is achieved by producing a reference signal having a frequency outside the frequency range of the RF communication signals. The reference signal is injected onto the RF communication signal. The power level of the reference signal is detected within the CMTS, whereby the power level correlates with an expected cable load impedance. A DC control voltage based on the detected power level of the reference signal is generated, which allows a controller to determine the connectivity statuses of the connected cables.

REFERENCES:
patent: 3986106 (1976-10-01), Shuck et al.
patent: 5414343 (1995-05-01), Flaherty et al.
patent: 5473599 (1995-12-01), Li et al.
patent: 5493650 (1996-02-01), Reinke et al.
patent: 5844411 (1998-12-01), Vogt
patent: 5977773 (1999-11-01), Medelius et al.
patent: 5990687 (1999-11-01), Williams
patent: 6400934 (2002-06-01), Calixte
patent: 6594305 (2003-07-01), Roeck et al.
patent: 2002/0129379 (2002-09-01), Lawson
Cahners Publishing, “CMTS Testing Keeps the Data Flowing” Test and Measurement World; vol. 20, No. 11, Sep. 1, 2000, pp. 47-48, 50, 52, 5, XP001005767; ISSN: 0744-1657; p. 47, middle column, para. 2; p. 47, right-hand column, para. 2; p. 48, middle column, para 1; p. 50, left-hand column, para 1; figure 1.

Affiliated with

Also associated with

Rating

Non-intrusive cable connection monitoring for use in HFC... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Non-intrusive cable connection monitoring for use in HFC..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Non-intrusive cable connection monitoring for use in HFC... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3507655