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:
Jun. 16, 2020
Filed:
Mar. 28, 2018
Applicant:
Polycom, Inc., San Jose, CA (US);
Inventors:
Eric Nylander, Westminster, CO (US);
George David, Westminster, CO (US);
Assignee:
Polycom, Inc., San Jose, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04L 29/06 (2006.01); H04L 29/08 (2006.01); H04L 12/803 (2013.01);
U.S. Cl.
CPC ...
H04L 65/1006 (2013.01); H04L 63/10 (2013.01); H04L 65/1069 (2013.01); H04L 67/1002 (2013.01); H04L 67/2814 (2013.01); H04L 47/125 (2013.01); H04L 63/0807 (2013.01);
Abstract
SIP INVITE messages received at a load balancer are returned as SIP Redirect messages which are addressed to an access director and include additional information, such as a tracing token and a cryptographic token. When the access director receives the redirected SIP INVITE, the access director analyzes the included cryptographic token and passes the SIP INVITE if the cryptographic token is correct. This provides the needed access control function to allow the access directors to be directly accessed by the endpoints, rather than funneling all communications through the load balancer.