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Telephone World - Telephone Switching Systems (Main Page)
2008 Jul 10
pstn
Goertzel and the Modified Goertzel Algorithm
2006 Mar 20
dtmf pstn voip dsp
Performance Evaluation and Real-Time Implementations of Subspace, Adaptive, and DFT Algorithms for Multi-Tone Detection
2006 Mar 20
dtmf pstn voip
Configurable PSTN Cause Code to SIP Response Mapping
2005 Nov 23
telco voip pstn
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