Configurable parameter DTMF detector

Multiplex communications – Wide area network – Packet switching

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

379 98, 379339, H04J 312

Patent

active

051630508

ABSTRACT:
In a digital messaging system (10), an apparatus (37) and method for determining whether a DTMF (Dual Tone Multi Frequency) digit is present on an input signal (11,12). A heuristics engine (37) performs a series of tests on the input signal (11,12) using a set of parameters that are stored in a RAM (38). There is one parameter for each of a set of input signal (11,12) characteristics and for each of a set of operating modes of the digital messaging system (10). All of the parameters are configurable. The configurability allows for the use of non-standard telephone equipment (13,14) and minimizes deleterious effects such as talkoff. The tests are from the set of sets comprising an absolute magnitude test, a frequency deviation test, a twist test, an echo test, a consistency test, and a temporal test.

REFERENCES:
patent: 4748654 (1988-05-01), Gray
patent: 4755985 (1988-07-01), Jayapalan
patent: 4873687 (1989-10-01), Breu
patent: 4996703 (1991-02-01), Gray
patent: 5029199 (1991-07-01), Jones et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Configurable parameter DTMF detector does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Configurable parameter DTMF detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Configurable parameter DTMF detector will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2300062

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.