T1 line format for robbed signaling for use with CCITT 32K bit p

Details T1 line format for robbed signaling for use with CCITT 32K bit p T1 line format for robbed signaling for use with CCITT 32K bit p

1988-10-20

1990-05-22

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 99, H04J 312

Patent

active

049282760

ABSTRACT:
This invention provides for uniformly distributing signaling data in a T1 line format for unrestricted 32 kb/s and 64 kb/s transmission channels. This scheme provides for placing a portion signaling information within each frame of a T1 transmission. Digital switching systems may process this signaling information more uniformly, instead of receiving 24 channels of signaling information during one T1 frame. The signaling information provides the digital switching system with indications of such supervisory functions as on-hook, off-hook and switching digits.

REFERENCES:
patent: 3341660 (1967-09-01), Duerdoth
patent: 3840705 (1974-10-01), Haskett et al.
patent: 4125745 (1978-11-01), Steidl
patent: 4757499 (1988-07-01), Gorshe
patent: 4764921 (1988-08-01), Graves et al.
"30-Channel Pulse-Code Modulation System" (Part 3), in Post Office Electrical Engineering Journal, vol. 71, Jan. 1979, pp. 225-232.

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