ISDN terminal adapter using reduced memory for timing difference

Details ISDN terminal adapter using reduced memory for timing difference ISDN terminal adapter using reduced memory for timing difference

1994-09-09

1996-04-09

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

H04J 322

Patent

active

055068456

ABSTRACT:
In a data communication system, a non-ISDN terminal transmits a signal at twice the rate of the ISDN basic interface to the ISDN where it is divided into B1 and B2 channel signals and sent over separate channels to a distant periphery of the network where they are byte-interleaved into a single data stream. A terminal adapter for protocol conversions between non-ISDN terminal and the ISDN network includes a data receiver for receiving a data stream from the ISDN network at twice the rate of the basic interface. The received data stream is byte-deinterleaved into first and second frame sequences corresponding respectively to the separate channels. An earlier one of these frame sequences is stored into a buffer memory until the other frame sequence arrives and read therefrom to one of the inputs of an interleaver where it is byte-interleaved with the other frame sequence into a single data stream and supplied to the non-ISDN terminal.

REFERENCES:
patent: 5331629 (1994-07-01), Tabata et al.
patent: 5400335 (1995-03-01), Yamada

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