Number | Name | Date | Kind |
---|---|---|---|
4270027 | Agrawal et al. | May 1981 | |
5500895 | Yurgelites | Mar 1996 | |
5655010 | Bingel | Aug 1997 | |
5870046 | Scott et al. | Feb 1999 | |
5875235 | Mohajeri | Feb 1999 |
Entry |
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European Telecommunications Standards Institute, Terminal Equipment (TE); Attachment requirements for pan-European approval for connection to the analogue Public Switched Telephone Networks (PSTNs) of TE (excluding TE supporting the voice telephony services) in which network addressing, if provided, is by means of Dual Tone Multi Frequency (DTMF) signaling, Jun. 1996. |