Telephonic communications – Centralized switching system – With generating of call associated substation signal
Patent
1993-10-21
1999-06-15
Kuntz, Curtis
Telephonic communications
Centralized switching system
With generating of call associated substation signal
379229, 379237, H04M 126, H04M 322
Patent
active
RE0362280
ABSTRACT:
A method and apparatus is provided within an interface to data terminal equipment for obtaining call progress information. The call progress information provides relevant data as to the progress of a call initiated by the data terminal equipment. The interface is designed to be used in a portion of the telephone network that lacks byte alignment. Such portions of the telephone network do not currently receive call progress tones. The interface is preferably a data service unit that includes a receiving means processor and a display means. The data service unit interprets signals sent from the DDA/OCU that encode the presence or absence of call progress tones sent from the destination node of an initiated call.
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Eberle, Jr. Charles R.
Joffe Daniel M.
Integrated Network Corporation
Kuntz Curtis
Loomis Paul
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