PC card for an ISDN interface

Details PC card for an ISDN interface PC card for an ISDN interface

1997-02-19

1999-05-18

Coleman, Eric

39580032, 39580038, G06F15/00

Patent

active

059059036

ABSTRACT:
ISDN-interface PC Card comprises a device connector for connecting a data processing device, a line connector for connecting a digital service unit (DSU), a controller for switching data sending and data receiving with the ISDN connected to the line connector and controlling the data communication conditions based on commands from the data processing device input through the device connector, a voice communication device connector for connecting a voice communication device, a connection detector for detecting connection of a voice communication device, and a data converter for coding and decoding the data input and output between the voice communication device and controller. When the connection detector detects that a voice communication device has been connected, the controller switches the ISDN line so that one ISDN B channel is used for data communication with the data processing device and the other B channel is used for voice communication.

REFERENCES:
patent: 5210741 (1993-05-01), Grochmal
patent: 5267245 (1993-11-01), Maruyama et al.
patent: 5365577 (1994-11-01), Davis et al.
patent: 5563943 (1996-10-01), Takebayashi et al.
patent: 5638373 (1997-06-01), Takebayashi et al.

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