Supervisory signaling for digital channel banks

Details Supervisory signaling for digital channel banks Supervisory signaling for digital channel banks

1979-07-13

1981-06-02

Stewart, David L.

Multiplex communications

Wide area network

Packet switching

H04J 312

Patent

active

042715091

ABSTRACT:
A digital transmission system is disclosed in which time slots in selected frames are reserved for supervisory signaling bits. These signaling bits can be used to represent a large number of supervisory states by assigning at least three bit patterns to each of two interleaved streams of supervisory bits. These bit patterns may include, for example, continuous ones, continuous zeros and alternating ones and zeros. A supervisory state encoder and decoder for these bit patterns are disclosed.

REFERENCES:
patent: 3909540 (1975-09-01), Maryscuk
patent: 3922495 (1975-11-01), Donohoe
patent: 3936609 (1976-02-01), Waldeck
patent: 3970799 (1976-07-01), Colton
patent: 4059731 (1977-11-01), Green
Bell Laboratories Record; Aug. 1972; "The D3 Channel Bank" by Gaunt et al.; pp. 229-233.
Bell System Technical Journal; vol. 51, Oct. 1972; "D2 Channel Bank; Digital Functions" By Cirillo et al.; pp. 1701-1712.
Bell Laboratories Record; Mar. 1977; "D4: Up-to-Date Channel Bank for Digital Transmission Plant" By Albert et al.; pp. 67-72.

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