FIREWALL ACCESS FOR INBOUND VOIP CALLS

摘要

A method and a system for providing firewall access to inbound calls in a Voice over Internet Protocol (VoIP) communication session. The server, after receiving a message for an incoming call, sends a PUSH alert notification to the destination device via a cellular network which lacks firewalls to stimulate creation of a new pin hole through the firewall by a renewed registration from the destination device of a Session Initiation Protocol (SIP) application.

主权项

1. A computer-implemented method for establishing reception by a destination device of an incoming Voice over Internet Protocol (VoIP) call, the method comprising:
configuring at least one central processing unit (CPU) of the destination device to: connect the destination device to an Internet Protocol (IP) data network; receive a PUSH notification message from a Session Initiation Protocol (SIP) server, via a cellular network, after the SIP server receives an incoming VoIP call; initiate registration of a SIP application installed on the destination device with the SIP server connected to the IP data network via the Internet, by transmitting a REGISTER message to the SIP server via the IP data network and the internet, wherein the REGISTER message causes a firewall in the IP data network to open a traversal pin hole; and receive the VoIP call from the SIP server via the newly opened pin hole to the IP data network and the Internet.