ISDN-based high speed communication system
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Nov 3, 1998
Issued Date -
N/A
app pub date -
Apr 28, 1997
filing date -
May 15, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ISDN interface is provided on a card, which is adapted for mounting in a terminal computer and which is operable to exchange data with a terminal computer and an ISDN. The ISDN interface card includes a protocol processor that is programmable to process data encoded in accordance with a number of different protocols and a digital signal processor that is programmable for data compression, encryption and facsimile applications, and u-law and a-law conversion, among other applications. The ISDN card dynamically allocates data calls between one or two B-channels to achieve a data transmission rate of 128 kbps. A power supply with a ring generator is provided to allow for the use of an analog telephone with the ISDN card. The ISDN card is programmable to allow users to create customized screens for various call processes, and to allow for the updating of a flash ROM coupled to the protocol processor through the terminal computer and the ISDN.
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