Telephonic communications – Telephone line or system combined with diverse electrical... – Having transmission of a digital message signal over a...
Reexamination Certificate
2005-03-29
2005-03-29
Matar, Ahmad F. (Department: 2742)
Telephonic communications
Telephone line or system combined with diverse electrical...
Having transmission of a digital message signal over a...
C379S088170, C379S900000, C370S352000
Reexamination Certificate
active
06873689
ABSTRACT:
A voice processing system is disclosed having a first interface for receiving telephone calls from the Public Switched Telephone Network (PSTN) and application software for processing received PSTN telephone calls. The voice processing system supports an API to allow the first interface to inform the application software of the presence of the call. The voice processing system further has a second interface for receiving telephone calls from an internet protocol (IP) network, and a signaling subsystem for routing an IP call from the second interface to the application software. This signaling subsystem uses the same API as is used to inform the application software about PSTN calls. Therefore, it is transparent to the application software whether an incoming call has been received from the IP network rather than the PSTN.
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VocalTec Telephony Gateway Web Publication, Jan. 27, 1997, see entire document.*
VocalTec Telephony Gateway—Internet Publication, Jan. 27, 1997.*
http://www.computertelephony.org (comprehensive directory of voice processing systems).
Butler Nicholas David
Renshaw David Seager
Ritchie Andrew James
Agdeppa Hector
Herndon Jerry W.
International Business Machines - Corporation
Matar Ahmad F.
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