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. 29, 2004
Filed:
Mar. 16, 2000
Patrick N. Sollee, Richardson, TX (US);
Christopher Haun, Richardson, TX (US);
Nortel Networks Limited, St. Laurent, CA;
Abstract
A communications system ( ) includes a packet-based data network ( ) that is coupled to various network elements ( , and ) that are capable of participating in audio-based call sessions over the data network ( ). The audio-based call sessions may be defined according to a Session Initiation Protocol (SIP) or to another type of protocol (e.g., H. 323). The network elements ( , and ) are also capable of participating in text-based chat sessions. Text messages exchanged in such text-based chat sessions are earned in messages that are defined according to the protocol for audio-based call sessions. In one example, such messages may be SIP Info messages. The SIP Info messages carrying the text messages may be communicated either during an established audio-based call session or outside of an audio-based call session. Using SIP (or another signal protocol) messages to carry the text messages allows such messages to be conveniently transported through a firewall system.