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Virtual PBX Based on SIP and Feature Servers

a virtual pbx and feature server technology, applied in the field of virtual pbx, can solve the problems of difficult to obtain internet access to the gip inside the lan, the difficulty of obtaining a gip from the internet, and the cost of pbx systems

Inactive Publication Date: 2007-01-25
RESOURCE CONSORTIUM LTD LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0033] In accordance with one aspect of the invention, a hierarchical internet telephony system includes a higher tier internet telephony feature server coupled to a communication network for directing telephone calls for a plurality of users and a plurality of lower tier internet telephony feature servers in communication with the higher tier internet telephone feature server over the c

Problems solved by technology

PBX systems are generally costly, both for setup / maintenance and on a per-extension basis.
However, the MGCP-based BB-phone faces a formidable challenge with Multi-dwelling Units (MDU), apartments / condominiums and business applications.
It is difficult to obtain accessibility from the Internet to the GIP inside the LAN.

Method used

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  • Virtual PBX Based on SIP and Feature Servers
  • Virtual PBX Based on SIP and Feature Servers
  • Virtual PBX Based on SIP and Feature Servers

Examples

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Embodiment Construction

[0044] In embodiments of the present invention, one or mare feature servers are used to provide advanced telephone services in an SIP-based VoIP system. The feature server(s) can provide many, if not all, PBX functions, as well as more advanced functions. Some exemplary feature server functions are described below.

[0045] Each feature server typically manages telephone services for an individual telephone number, and each feature server can operate as a stand-alone element that is not necessarily limited to use with a central PBX (e.g., IP-Centrex). Each subscriber can have a personal feature server that can be configured and managed by the subscriber and that operates independently of other feature servers. In this respect, the feature servers are modular in that there is no central management of the feature servers and feature servers can be easily added and removed from the network. A network of such modular feature servers essentially operates as a virtual PBX, enabling each sub...

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PUM

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Abstract

A hierarchical internet telephony system includes a higher tier internet telephony feature server and a plurality of lower tier internet telephony feature servers. The higher tier internet telephony feature server fowrards telephone calls to the lower tier internet telephony feature servers, and each lower tier internet telephony feature server is configurable separately from the higher tier internet telephony feature server and from other lower tier internet telephony feature servers to handle telephone calls received from the higher tier internet telephony feature server.

Description

PRIORITY [0001] This patent application is a divisional of U.S. patent application Ser. No. 10 / 729,871 entitled VIRTUAL PBX BASED ON SIP AND FEATURE SERVERS filed on Dec. 3, 2003 in the name of Shigeaki Hakusui, which claims priority from U.S. Provisional Patent Application No. 60 / 431,038 entitled VIRTUAL PBX BASED ON SIP AND FEATURE SERVERS filed Dec. 5, 2002 in the name of Shigeaki Hakusui. The above-referenced patent applications are hereby incorporated herein by reference in their entireties.FIELD OF THE INVENTION [0002] The present invention relates generally to telephonic communications, and more particularly to a virtual PBX (Private Branch Exchange) based on the Session Initiated Protocol (SIP) and feature servers in a Voice-over-IP (VoIP) system. BACKGROUND OF THE INVENTION [0003] A Private Branch Exchange (PBX) is a subscriber-owned telecommunications exchange that usually includes access to the public switched telephone network (PSTN). The PBX can typically provide variou...

Claims

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Application Information

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IPC IPC(8): H04L12/66H04M1/00H04M3/20H04M3/42H04M3/428H04M3/46H04M3/54H04M7/00
CPCH04L65/1006H04M1/006H04M3/20H04M3/42127H04M3/42161H04M7/0069H04M3/4288H04M3/46H04M3/465H04M3/54H04M3/42314H04L65/1104
Inventor HAKUSUI, SHIGEAKI
Owner RESOURCE CONSORTIUM LTD LLC