Delivering sip-based call services to circuit-switched terminals

A Itzkovitz, T Livyatan, T Zoller - US Patent 8,243,715, 2012 - Google Patents
A method for communication in a communication system includes predefining a plurality of
service delivery modes having different signaling and media path configurations in circuit …

Simultaneous delivery of a telephony call over a broadband access network and a circuit-switched network

MC Cattani, PA Brice - US Patent 8,379,632, 2013 - Google Patents
A call processing module includes a first network interface configured to communicate over
a packet-switched network and a second network interface configured to communicate with …

Setting up calls over circuit and packet-switched resources on a network

RJ Abrams, Z Li, ZJ Yang, HL Lu - US Patent 7,158,508, 2007 - Google Patents
(57) ABSTRACT A method of setting up calls over circuit-switched and packet-switched
resources on a single network having the steps of receiving a request from a user for a call …

Method and system for interfacing a legacy circuit-switched network with a packet-switched network

V McConnell, W Xue, B Zhang, J Money - US Patent 6,741,695, 2004 - Google Patents
An interface engine that is communicatively connected to a packet-switched network and to
a legacy circuit-switched network uses a call processing protocol, such as the session …

Technique for emergency session handling in a communication network

R Keller, A Witzel - US Patent 8,619,675, 2013 - Google Patents
Techniques of emergency session handling in a communica tion network are provided, in
which a packet Switched net work control function configured to handle emergency ses …

GSM and LTE multiplexing

M Olsson, G Rune, P Synnergren… - US Patent …, 2016 - Google Patents
In a method of operating a wireless terminal, the wireless terminal (30) sends a request to
participate in a circuit switched call with a circuit switched network. Prior to establishment of …

System and method for originating a call via a circuit-switched network from a user equipment device

A Buckley, JL Bakker - US Patent 8,369,319, 2013 - Google Patents
Methods and apparatus for originating a Session Initiation Protocol (SIP) call from a user
equipment (UE) device in a network environment including a circuit-switched (CS) network …

Method for Establishing a Circuit Switched Call at a Dual Mode Access Terminal

X Xu, C Xu, WD Zuo - US Patent App. 12/375,439, 2010 - Google Patents
SUMMARY OF THE INVENTION 0005 According to one aspect, the present invention is a
method for establishing a circuit Switched call at an access terminal that is processing an …

System and methods for originating a SIP call via a circuit-switched network from a user equipment device

A Buckley, JL Bakker - US Patent 7,710,950, 2010 - Google Patents
Methods and apparatus for originating a Session Initiation Protocol (SIP) call from a user
equipment (UE) device in a network environment including a circuit-switched (CS) net work …

Roaming in communications system

T Jalkanen - US Patent 9,301,079, 2016 - Google Patents
The present Solution relates to providing a call service in a communication system, where in
response to recognizing a predetermined event related to a user terminal (UEA), it is …