Forcing V.34 fax terminals to fallback to legacy G3 modulations over voice over intrnet protocol networks
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United States of America Patent
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Issued Date -
Mar 30, 2006
app pub date -
Sep 30, 2004
filing date -
Sep 30, 2004
priority date (Note) -
Abandoned
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Abstract
Gracefully forcing two V.34 fax devices to use legacy G3 modulations (e,g., V.21, V.27ter, V.29, V.17) when communicating over a packet network (e.g, voice over Internet Protocol (VoIP)network). To force an originating fax terminal 10 and receiving fax terminal 18 to fallback to legacy modulation procedures, transmission of a Call Menu (CM) 'FAX' signal 54 transmitted by the originating fax device 10 is suppressed S38 at either the originating VoIP/FoIP gateway 12 or answering VoIP/FoIP gateway 16. The suppression of the CM signal 54 forces the answering V.34 fax device 18 to timeout and fallback to non-V.34 fax modulations S40 as if the calling terminal 10 was not V.34-capable. Likewise, upon detecting the non-V.34 fax signals, the originating V.34 fax device 10 will fallback to non-V.34 fax procedures S42. The two V.34 fax terminals will continue the fax transmission using non-V.34 modulations S44.
First Claim
Family
- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
---|---|---|
TELOGY NETWORKS INC | 20250 CENTURY BOULEVARD GERMANTOWN MD 20874 |
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Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
---|---|---|---|
Fruth, Frank E | Gaithersburg, MD | 2 | 245 |
Lo, Herman | Boyds, MD | 1 | 10 |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
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