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

Patent metadata

Field	Value
Publication number	US-2019364481-A1
Application number	US-201916533712-A
Country	US
Kind code	A1
Filing date	Aug 6, 2019
Priority date	Mar 2, 2006
Publication date	Nov 28, 2019
Grant date	—

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, at a private branch exchange (PBX), an instruction to route a call to a phone associated with a mobile station; routing, by the PBX, the call to the phone and to an enterprise gateway server; routing, by the enterprise gateway server, the call to a carrier network; notifying, by the enterprise gateway server, the private branch exchange that the mobile station is ringing; and cancelling, by the private branch exchange, the call to the phone responsive to receiving an indication that the call was answered at the mobile station.

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 the 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, a temporary routing number required to deliver the call to the mobile station.

5 . 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 the phone communicably coupled to the private branch exchange.

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

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

8 . The method of claim 1 , further comprising inserting, by the enterprise gateway server, a media port into a call path allocated for the call, and allocating, by the enterprise gateway server, the media port for insertion into the call path.

9 . 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.

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 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.

12 . The method of claim 11 , 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.

13 . The method of claim 12 , further comprising rerouting, by the carrier gateway server, the call into an enterprise network for call handling.

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; routing the call to a media server; establishing a bearer path to support the call; and transmitting a ringing indication via the bearer path.

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 ,
wherein the ringing indication is transmitted from the end user device to the user device via the bearer path.

18 . The method of claim 17 , further comprising:
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.

19 . A system, comprising:
a private branch exchange (PBX) configured to
receive an instruction to route a call to a phone associated with a mobile station;
route the call to the phone and to an enterprise gateway server; and
an enterprise gateway server configured to
route the call to a carrier network;
notify the PBX that the mobile station is ringing; and
wherein the PBX is configured to cancel the call to the phone responsive to an indication being received that the call was answered at the mobile station.

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

Assignees

• Tango Networks Inc

Inventors

• Silver Andrew
• Lewis Lathan
• Landgren Patricia

Classifications

• H04W92/02

  Inter-networking arrangements · CPC title

• H04W76/20

  Manipulation of established connections · CPC title

• H04L67/10

  in which an application is distributed across nodes in the network (software deployment G06F8/60; multiprogramming arrangements G06F9/46) · CPC title

• H04Q2213/13384

  Inter-PBX traffic, PBX networks, e.g. corporate networks · CPC title

• H04Q2213/13224

  Off-net subscriber, dial in to/out from network, teleworking · CPC title