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, 1992
Filed:
Jan. 23, 1990
Applicant:
Inventors:
David W Thorn, Richardson, TX (US);
Rajendra Patel, Plano, TX (US);
Gordon Sohl, Richardson, TX (US);
Assignee:
Network Access Corporation, Richardson, TX (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ; H04M / ; H04M / ;
U.S. Cl.
CPC ...
379230 ; 379207 ; 379284 ; 379289 ;
Abstract
The invention relates to upgrading existing telephone central offices having 1ESS or 1AESS switching equipment to utilize the SS7 protocol. In particular, the 1ESS and 1AESS switching equipment is provided with the capability of controlling the connection, management, and disconnection of telephone circuits using Signaling System Number 7 (SS7), a national and international standard set of protocols for providing such circuit control and providing and receiving information via the SS7 protocol for enabling enhanced service in the switching equipment.