DTMF Signal Generator

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DTMF generator...
http://aggemam.dk/code/dtmf

...
http://ftp.tiaonline.org/tr-41/tr4138/Public/2004-08-Washington/TR41.3.8-04

Sympatico.ca Search - Find what you're looking for!...
http://search.sli.sympatico.ca/partner/sli/asp/results.asp?lang=en&mode=Pop

DTMF Generator & Receiver for ...
http://www.dsp-bayer.de/pdf/Dtmf_bf.pdf

EE612 - HW 4 ...
http://www.ee.iitm.ac.in/~dj/ee612/hw4.pdf

Data Sheet ...
http://www.etools.de/downloads/spiritcalleriddatasheet.pdf

GRADNET...
http://www.gradnet.iec.org/corporate/agilent_products.asp

...
http://www.ibp.de/ECTF/S.300/sg.idl

INTEGRATED CIRCUITS ...
http://www.integral.by/english/2/2_1_4.pdf

M & B Radio...
http://www.mb-radio.co.uk/frames/signal/hp/hp.html

Products...
http://www.mesi.net/products.htm

United States Patent: 4,834,551...
http://www.scils.rutgers.edu/~jimkatz/United%20States%20Patent%204%2C834%2C

Innovative Product award...
http://www.sipa.gov.tw/innovation-e/innovation-e-90/252.html

...
http://www.sygnusdata.co.uk/datasheets/ameritec/fortissimoanalogbro.pdf

The opinion in support of the decision being ...
http://www.uspto.gov/web/offices/dcom/bpai/decisions/fd012270.pdf

[ipcdn] IETF NCS Sig MIB Gain (loss) plan and tone Levels...
http://www1.ietf.org/mail-archive/web/ipcdn/current/msg01591.html