The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 04, 1986
Filed:
Dec. 23, 1983
Mikiel L Larson, St. Charles, IL (US);
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
In a voice packet switching network (10), following call path set-up, continuity packets (500a-c) are transmitted between the call originating (100) and destination (101) nodes to check call path continuity. The continuity packets carry time stamps of their (503) and the preceding continuity packet's (504) time of transmission, to permit determination of call path transit delay, and computation of asynchrony between clocks (200) of the two nodes. A call path is considered acceptable if one half the path round trip transit delay does not exceed a predetermined maximum acceptable delay. Subsequently transmitted data packets are discarded if their transit delay exceeds the predetermined maximum acceptable delay. Transit delay of a data packet is computed from originating and terminating node clock readings at the time of transmission and reception of the packet, respectively, adjusted for asynchrony of the two clocks.