Two wire, sub-rate 2B1Q ISDN architecture

Details Two wire, sub-rate 2B1Q ISDN architecture Two wire, sub-rate 2B1Q ISDN architecture

1997-02-21

1999-04-20

Nguyen, Chau

Multiplex communications

Communication techniques for information carried in plural...

Adaptive

370545, 370524, 379 9301, H04J 322, H04J 312

Patent

active

058963901

ABSTRACT:
A sub (half)-rate DDS channel transport network architecture is configured to drive each of a ISDN transceiver unit of an OCU DP at one end of a two-wire path and the ISDN transceiver unit of a DDS termination unit at an opposite end of the two-wire path at one-half the normal clock rate, which reduces the operating frequency for rates of 56 kbps and 64 kbps. This sub-rate operation decreases its vulnerability to interference sources such as bridge taps. It also offers a trade-off against loop loss, enabling the effective range of the two-wire DDS circuit to be geographically extended, while complying with applicable industry standards for loop deployment and testing.

REFERENCES:
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patent: 5251210 (1993-10-01), Mann et al.
patent: 5351239 (1994-09-01), Black et al.
patent: 5473613 (1995-12-01), Bliven
patent: 5598413 (1997-01-01), Sansom et al.
patent: 5610922 (1997-03-01), Balatoni
patent: 5668814 (1997-09-01), Balatoni

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