Time slot interchanger and digital communications terminal for I

Details Time slot interchanger and digital communications terminal for I Time slot interchanger and digital communications terminal for I

1996-12-04

1999-05-18

Chan, Jason

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

370376, H04J3/16

Patent

active

059057351

ABSTRACT:
The invention comprises a time slot interchanger and method for multiplexing ISDN D-channel signals into multiplexed signals in a digital communications terminal. One method comprises receiving a frame of communication signals wherein some of the communication signals represent ISDN D-channel signals wherein each ISDN D-channel signal is represented by a first number of data bits and a second number of other bits. The first number of data bits are stored in one of four memories--a first memory, second memory, third memory or fourth memory. The data bits are stored during a first frame period. Multiplexed signals are then assembled wherein a multiplexed signal comprises a multiplexed combination of the data bits of ISDN D-channel signals retrieved from the frame of communications signals. The multiplexed signals are assembled by storing the data bits of at least two ISDN D-channel signals, each set of data bits stored at the same memory address but in a separate one of the first, second, third or fourth memories.

REFERENCES:
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patent: 5157656 (1992-10-01), Turudic et al.
patent: 5640387 (1997-06-01), Takahashi et al.
M.J.M. Forbes et al. Integrated Access: The Achievement of a Vision, IEEE 2081-2086, 1991.
Arvidson et al., A Generic Digital Switch Interface(TR-303) for Local Access, IEEE 2087-2091, 1991.
Kim et al., Flexibility and Quality in the Access Network, IEEE 1864-1868, 1992.
Bellcore Information, Bellcore: GR-303 Integrated Access Platforms, Mar. 3, 1998.

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