H - Electricity – 04 – J
Patent
H - Electricity
04
J
363/10
H04J 3/22 (2006.01) H04J 3/16 (2006.01) H04Q 11/04 (2006.01)
Patent
CA 1331228
- 9 - Abstract A synchronous protocol data formatter handles all 24-32 channels of a so-called primary rate version of a digital multiplexed interface or ISDN Primary Rate Interface for a communication system. The formatter relieves the host computer of the local area network of some highly specialized tasks, and, at thesame time, provides the following augmented capabilities, which exceed those required by the C.C.I.T.T. standard, I431: 1. dynamic channel bandwidth alloction can assign arbitrary (even non-adjacent) time slots to create a super channel; 2. a circular interrupt-queue in a shared memory enables the formatter and the host computer of the local area network to interact efficiently in updating and responding to changing conditions; and 3. cyclical redundancy codes can be used on a more flexible basis than heretofore, e.g., can be generated upon only address and control fields fordigitized voice signals, or, in a relay mode, can substitute an existing cyclical redundancy code to guard against memory errors.
593851
Chao Philip Chi Jen
Choe Bong Sup
Fairfield Robert Charles
Hiller Thomas L.
King Robert William
American Telephone And Telegraph Company
Kirby Eades Gale Baker
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