# US 10,375,616 B2 · Call flow system and method for use in a VOIP telecommunication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,616 B2 - Document ID: US10375616B2 - Status: Granted - Kind: B2 - Application number: 15/944,481 - Filed: 2018-04-03 - Published: 2018-08-09 - Granted: 2019-08-06 - Earliest claimed: 2006-03-02 - Assignees: Tango Networks, Inc. - Applicants: Tango Networks, Inc - Inventors: Andrew Silver; Lathan Lewis; Patricia Landgren - Web page: https://patentgrep.com/patent/US10375616B2 ## CPC - H04W 4/20: Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel - H04L 12/66: Arrangements for connecting between networks having differing types of switching systems, e.g. gateways - H04L 65/00: Network arrangements, protocols or services for supporting real-time applications in data packet communication (real-time or near real-time messaging, e.g. instant messaging [IM] H04L51/04; selective video distribution H04N21/00) - H04L 65/1016: IP multimedia subsystem [IMS] - H04L 65/102: Gateways (arrangements for connecting between networks having differing types of switching systems, e.g. gateways, H04L12/66) - H04L 65/1023: Media gateways - H04L 65/1033: Signalling gateways - H04L 65/104: {in the network} - H04L 65/1053: IP private branch exchange [PBX] functionality entities or arrangements (circuit switched PBXs H04M3/00) - H04L 65/1069: Session establishment or de-establishment - H04L 65/1076: Screening of IP real time communications, e.g. spam over Internet telephony [SPIT] - H04L 65/1095: Inter-network session transfer or sharing - H04L 65/1104: Session initiation protocol [SIP] - H04L 67/10: in which an application is distributed across nodes in the network (software deployment G06F8/60; multiprogramming arrangements G06F9/46) - H04L 67/56: Provisioning of proxy services (store-and-forward switching systems in data switching networks H04L12/54) - H04M 3/42042: {Notifying the called party of information on the calling party (details within substation equipment H04M1/57, signalling details H04Q3/72)} - H04M 3/42068: {where the identifier is used to access a profile} - H04M 3/42102: {Making use of the called party identifier} - H04M 3/42314: {in private branch exchanges} - H04M 7/0075: {Details of addressing, directories or routing tables} - H04M 7/009: {in systems involving PBX or KTS networks} - H04M 15/00: Arrangements for metering, time-control or time indication {; Metering, charging or billing arrangements for voice wireline or wireless communications, e.g. VoIP} - H04M 15/57: {for integrated multimedia messaging subsystem [IMS]} - H04M 15/63: {based on the content carried by the session initiation protocol [SIP] messages} - H04M 15/8292: {Charging for signaling or unsuccessful connection} - H04Q 3/0025: {Provisions for signalling} - H04Q 3/0045: {involving hybrid, i.e. a mixture of public and private, or multi-vendor systems} - H04Q 3/62: for connecting to private branch exchanges - H04Q 3/72: Finding out and indicating number of calling subscriber - H04W 4/16: Communication-related supplementary services, e.g. call-transfer or call-hold - H04W 8/26: Network addressing or numbering for mobility support - H04W 28/0289: {Congestion control (load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12)} - H04W 40/02: Communication route or path selection, e.g. power-based or shortest path routing - H04W 40/22: using selective relaying for reaching a BTS [Base Transceiver Station] or an access point - H04W 40/30: for proactive routing - H04W 76/10: Connection setup - H04W 76/12: Setup of transport tunnels - H04W 88/16: Gateway arrangements - H04W 92/02: Inter-networking arrangements - H04W 92/06: between gateways and public network devices - H04L 65/1106: Call signalling protocols; H.323 and related - H04M 7/006: {Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer (H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42)} - H04M 2203/1091: Fixed mobile conversion - H04M 2215/208: IMS, i.e. Integrated Multimedia messaging Subsystem - H04Q 2213/13034: A/D conversion, code compression/expansion - H04Q 2213/1307: Call setup - H04Q 2213/13091: CLI, identification of calling line - H04Q 2213/13098: Mobile subscriber - H04Q 2213/13109: Initializing, personal profile - H04Q 2213/13176: Common channel signaling, CCS7 - H04Q 2213/1318: Ringing - H04Q 2213/13196: Connection circuit/link/trunk/junction, bridge, router, gateway - H04Q 2213/13204: Protocols - H04Q 2213/1322: PBX - H04Q 2213/13224: Off-net subscriber, dial in to/out from network, teleworking - H04Q 2213/13296: Packet switching, X.25, frame relay - H04Q 2213/13348: Channel/line reservation - H04Q 2213/13384: Inter-PBX traffic, PBX networks, e.g. corporate networks - H04Q 2213/13389: LAN, internet - H04Q 2213/13405: Dual frequency signaling, DTMF - H04Q 2213/13407: Detection of data transmission mode - H04W 8/12: between location registers or mobility servers - H04W 40/00: Communication routing or communication path finding - H04W 76/19: Connection re-establishment - H04W 76/20: Manipulation of established connections - H04W 76/22: Manipulation of transport tunnels - H04W 76/28: Discontinuous transmission [DTX]; Discontinuous reception [DRX] - H04W 76/30: Connection release - H04W 80/00: Wireless network protocols or protocol adaptations to wireless operation - H04W 84/16: WPBX [Wireless Private Branch Exchange] - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) - H04Q: SELECTING (switches, relays, selectors H01H; wireless communication networks H04W) ## 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. ## Claims ### Claim 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; establishing a fork, by the PBX, to route 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. ### Claim 2 (depends on 1) 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. ### Claim 3 (depends on 2) The method of claim 2, further comprising performing, by the carrier gateway server, a location request. ### Claim 4 (depends on 3) 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. ### Claim 5 (depends on 2) The method of claim 2, further comprising forwarding, by the carrier gateway server, a temporary routing number to the enterprise gateway server. ### Claim 6 (depends on 2) 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. ### Claim 7 (depends on 2) 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. ### Claim 8 (depends on 7) The method of claim 7, 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. ### Claim 9 (depends on 8) The method of claim 8, further comprising rerouting, by the carrier gateway server, the call into an enterprise network for call handling. ### Claim 10 (depends on 1) 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. ### Claim 11 (depends on 1) The method of claim 1, further comprising receiving, by the enterprise gateway server, an indication that the mobile station is ringing. ### Claim 12 (depends on 1) 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. ### Claim 13 (depends on 1) 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. ### Claim 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; routing the call to the media server; establishing a bearer path to support the call; and transmitting a ringing indication via the bearer path. ### Claim 15 (depends on 14) The method of claim 14, wherein a voice over the Internet (VoIP) protocol is used by the media server to route the call. ### Claim 16 (depends on 14) The method of claim 14, further comprising routing the call from the media server to a private branch exchange via the enterprise gateway server. ### Claim 17 (depends on 14) The method of claim 14, wherein the ringing indication is transmitted from the end user device to the user device via the bearer path. ### Claim 18 (depends on 17) 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. ### Claim 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; establish a fork to route the call to the phone and to an enterprise gateway server; 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. ### Claim 20 (depends on 19) 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.