Number | Name | Date | Kind |
---|---|---|---|
4582956 | Doughty | Apr 1986 | |
4703499 | Fossas et al. | Oct 1987 | |
5093856 | Atkinson et al. | Mar 1992 | |
5206900 | Callele | Apr 1993 | |
5228080 | Nutter et al. | Jul 1993 | |
5263084 | Chaput et al. | Nov 1993 | |
5327493 | Richmond et al. | Jul 1994 | |
5353342 | Pietrowicz | Oct 1994 | |
5381462 | Larson | Jan 1995 | |
5388150 | Schneyer et al. | Feb 1995 | |
5394461 | Garland | Feb 1995 | |
5452289 | Sharma | Sep 1995 |
Number | Date | Country |
---|---|---|
2258119 | Jan 1993 | GBX |
WO9311643 | Jun 1993 | WOX |
Entry |
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Bellcore Special Report, "A Method and Apparatus for Detecting a Dual Tone Signal in the Presence of Speech" SR-TSV-002578 Issue 1 (1993). |
Bellcore Special Report, "Customer Premises Equipment Compatibility Considerations for the Voiceband Data Transmission Interface" SR-TSV-002476 Issue 1 (1992). |
"The Analog Display Services Interface" pp. 70-75; IEEE Magazine, Apr. 1993. |