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Dual Tone Multi-Frequency (DTMF) Software Provides User-callable Functions by Perry Keller





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Dual Tone Multi-Frequency (DTMF) Software Provides User-callable Functions by
Article Posted: 09/09/2012
Article Views: 86
Articles Written: 1727
Word Count: 304
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Dual Tone Multi-Frequency (DTMF) Software Provides User-callable Functions


 
Business News,Marketing,Press Release
Dual Tone Multi-Frequency (DTMF) Software Provides User-callable Functions Toronto, Canada – GAO Research Inc. (www.GAOResearch.com) is offering its dual tone multi-frequency (DTMF) software for telephone systems. DTMF is an international signalling standard for touch-tone telephones. It is widely used in interactive control applications such as telephone banking, electronic mail systems, and many other menu-driven operations that respond to digits entered from a telephone. GAO's Dual Tone Multi-Frequency (DTMF) Software is an implementation of a Dual-Tone Multi-Frequency (DTMF) generator and decoder. It generates standard telephone digits as the sum of sinusoids corresponding to a frequency table for each digit. The DTMF decoder will take a digital signal as input and produce the decoded digit. GAO's DTMF software generates and decodes 8 kHz PCM samples. GAO’s DTMF generator and decoder feature user-callable functions, low data and program memory requirements. It consists of four user-callable functions that perform the generating, decoding, and initialization operations. GAO's Dual Tone Multi-Frequency (DTMF) Software is implemented in assembly and C and is fully compliant to EIA/TIA - 464B 6.1.4 and 6.1.5.1 to 6.1.5.5. This dual tone multi-frequency (DTMF) software belongs to GAO’s family of Telephony Software. This line includes a wide variety of telephony modules such as Call Progress (CP) software which provides full call progress tone detection and generation functionality and operates on PCM samples, Acoustic Echo Cancellation Software (AEC) and MF R1/R2 software. GAO provides a complete package for telephony that includes speech compression modules and telephony modules. The software packages can be used for feature phones, Internet phones, multi-channel computer telephony boards, soft PBXs and Voice over IP.

About GAO Research Inc. GAO Research Inc. (www.GAOResearch.com) is a world-renowned provider of high quality, reliable telecommunications software including embedded modem software, fax modem software, speech codes, and telephony software for a wide range of DSPs and microprocessors.

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