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Abstract

A method and portable ISDN interface module for interfacing both a computer or digital device having a framed data format such as HDLC with an analog telephone over integrated partitioned ISDN channels is provided. The portable ISDN interface module comprises an analog telephone interface, a controller or mechanism for generating and managing the partitioned channels of an ISDN service and an ISDN interface. The analog telephone interface receives and transmits analog information with an analog telephone or other analog device such as a fax/modem between the corresponding external devices and the ISDN interface. The controller or channel generating means implements the channelization or partitioning of the physical link between the portable ISDN interface module and the ISDN. The ISDN interface provides encoding and decoding of analog information and multiplexes the various information sources such as digitized analog telephone information and digital data information into the corresponding ISDN partitioned channels. The ISDN interface presents both an S/T-interface and a U-interface to the ISDN system. Additional telephony functionality such as answering machine and speed-dialing are also provided.

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First Claim