Call flow system and method for use in a VoIP telecommunication system

Patent metadata

Field	Value
Publication number	US-9936435-B2
Application number	US-201615333967-A
Country	US
Kind code	B2
Filing date	Oct 25, 2016
Priority date	Mar 2, 2006
Publication date	Apr 3, 2018
Grant date	Apr 3, 2018

Abstract

A method of establishing a communication link between a mobile terminal of a wireless network and a subscriber of a network, such as an enterprise network, and/or a residential network.

First claim

What is claimed is:

1. A method, comprising:
receiving, by an enterprise gateway server, an instruction to redirect a call to a carrier network via a temporary routing number;
routing, by the enterprise gateway server, the call to the carrier network via the temporary routing number;
notifying, by the enterprise gateway server, a private branch exchange that received a request for the call, that a mobile station is ringing; and
inserting, by the enterprise gateway server, a media port into a call path allocated for the call.

2. The method of claim 1 , further comprising:
transmitting, by the private branch exchange, a first call invite message to the enterprise gateway server;
transmitting, by the private branch exchange, a second call invite message to a phone;
forwarding, by the enterprise gateway server, the first call invite message to a carrier gateway server; and
establishing a secure tunnel between the enterprise gateway server and the carrier gateway server.

3. The method of claim 2 , further comprising performing, by the carrier gateway server, a location request.

4. The method of claim 3 , further comprising receiving, by the enterprise gateway server, the temporary routing number required to deliver the call to the mobile station.

5. The method of claim 2 , further comprising forwarding, by the carrier gateway server, the temporary routing number to the enterprise gateway server.

6. The method of claim 2 , further comprising receiving, by the carrier gateway server, a termination trigger indicating that the call has been terminated to a mobile number of a second mobile station of an enterprise network member.

7. The method of claim 6 , further comprising:
issuing, by the carrier gateway server, a request to the enterprise gateway server for a termination policy; and
receiving, by the carrier gateway server, the termination policy.

8. The method of claim 7 , further comprising rerouting, by the carrier gateway server, the call into an enterprise network for call handling.

9. The method of claim 1 , further comprising receiving, by the private branch exchange, a call origination request of the call destined to a member having the mobile station and a phone communicably coupled to the private branch exchange.

10. The method of claim 2 , further comprising cancelling, by the private branch exchange, a call leg associated with the second call invite message to the phone.

11. The method of claim 1 , further comprising receiving, by the enterprise gateway server, an indication that the mobile station is ringing.

12. The method of claim 1 , further comprising allocating, by the enterprise gateway server, the media port for insertion into the call path.

13. The method of claim 1 , further comprising receiving, by the enterprise gateway server, an indication that the call has been answered at the mobile station.

14. A method, comprising:
receiving a call origination request at a carrier gateway server to route a call initiated from a user device destined for an end user device;
querying, by the carrier gateway server, an enterprise gateway server to identify a policy used to route the call;
receiving, by the enterprise gateway server, a request to route the call to the end user device based on the policy;
designating, by the enterprise gateway server, a media server to route the call;
transmitting a ringing indication from the end user device to the user device; and
routing the call to the media server.

15. The method of claim 14 , wherein a voice over the Internet (VoIP) protocol is used by the media server to route the call.

16. The method of claim 14 , further comprising routing the call from the media server to a private branch exchange via the enterprise gateway server.

17. The method of claim 14 , further comprising:
establishing a bearer path to support the call;
transmitting a ringing indication to the user device via the bearer path;
establishing a media path controlled by the enterprise gateway server that is separate from the bearer path that operates between a private branch exchange and the end user device; and
connecting the bearer path to the end user device via the enterprise gateway server when the end user device answers the call.

18. A system, comprising:
a carrier gateway server configured to
identify a call request associated with a call;
transmit a temporary routing number required to deliver the call;

an enterprise gateway server configured to
route the call to a carrier network via a temporary routing number; and

a private branch exchange;
wherein the enterprise gateway server is also configured to
notify the private branch exchange that received a request for the call, that a mobile station is ringing; and
insert a media port into a call path allocated for the call.

19. The system of claim 18 , wherein the private branch exchange is configured to receive a call origination request of the call destined to a member having the mobile station and a phone communicably coupled to the private branch exchange.

Assignees

• Tango Networks Inc

Inventors

• Silver Andrew
• Lewis Lathan
• Landgren Patricia

Classifications

• H04Q2213/13196

  Connection circuit/link/trunk/junction, bridge, router, gateway · CPC title

• H04Q2213/13109

  Initializing, personal profile · CPC title

• H04W80/00

  Wireless network protocols or protocol adaptations to wireless operation · CPC title

• H04M15/57

  for integrated multimedia messaging subsystem [IMS] · CPC title

• H04Q2213/1307

  Call setup · CPC title