Customer owned telephone numbers

• US 9,031,219 B2
• Filed: 05/08/2007
• Issued: 05/12/2015
• Est. Priority Date: 12/27/2005
• Status: Active Grant

• Current Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Original Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Inventors: Mikleton, Christopher W., Hunter, Dena M., Simpkins, Wayne F.
• Primary Examiner(s): Asanbayev, Oleg
• Application Number:
  US11/745,879
• Publication Number:
  US 20070258442A1
• Time in Patent Office: 2,926 Days
• Field of Search: 370352-356, 379/219, 379/221.13
• US Class Current: 379/219
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables

Abstract

According to various embodiments of the present invention, systems and methods for routing telephone calls from host switch to remote switch in a Voice Over Internet Protocol (“VoIP”) network. In one embodiment, a system includes a host switch in a voice over internet protocol (“VoIP”) network communicably coupled with a plurality of remote switches and a public switched telephone network (“PSTN”), the host switch to receive a call from the PSTN having signaling including a location routing number (“LRN”) field, and a database communicably coupled to the host switch to identify a target remote switch of the plurality of remote switches that is associated with at least a portion of the LRN field. In addition, the host switch is to send the call to the target remote switch based on the identification by the database. Other embodiments are also disclosed.

Claims

1. A system for routing a call to a customer-owned telephone number, the system comprising:

a host switch in a voice over internet protocol (“

VoIP”

) network communicably coupled with a plurality of remote switches and a public switched telephone network (“

PSTN”

), wherein each of the plurality of remote switches is located on a remote network distinct from the VoIP network and the PSTN, and wherein the host switch is operable to receive a call from the PSTN having signaling including a location routing number (“

LRN”

) field and a called party number field; and

a database communicably coupled to the host switch to identify a target remote switch of the plurality of remote switches that is associated with at least a portion of the LRN field, wherein the database is a LRN/telephone number (“

TN”

) database within the VoIP network, and wherein the LRN/TN database identifies the target remote switch that corresponds with at least a portion of the LRN field;

wherein the host switch is configured to send the call to the target remote switch based on the identification by the database.

2. The system of claim 1, wherein the host switch is further configured to determine whether a called party number field of the signaling has been Local Number Portability (“

LNP”

)-dipped, and if not, to query a Number Portability Administration Center (“

NPAC”

) database with the called party number field to identify the LRN field that is associated with the called party number field.

3. The system of claim 1, wherein the target remote switch comprises at least one of a Class 4 softswitch, a hybrid Class 4/Class 5 softswitch, a Class 4/Class 5 (Time Division Multiplexing) TDM switch, and a Class 5 softswitch.

4. A system as recited in claim 1, wherein the signaling comprises a calling party field.

5. A method comprising:

providing a voice over internet protocol (“

VoIP”

) network communicably coupled with a public switched telephone network (“

PSTN”

) and a plurality of remote switches, wherein each of the plurality of remote switches is located a remote network distinct from the VoIP network and the PSTN;

receiving a call from the PSTN having signaling including a called party number field and a location routing number (“

LRN”

) field;

determining whether a called party number of the signaling has been Local Number Portability (“

LNP”

) dipped, and if not, querying a LNP database with the called party number to identify a LRN for the LRN field associated with the called party number;

identifying a target remote switch of the plurality of remote switches that is associated with at least a portion of the LRN field, wherein the identifying the target remote switch further comprises querying an LRN/telephone number (“

TN”

) database within the VoIP network to identify the target remote switch that corresponds with at least a portion of the LRN field; and

sending the call to the target remote switch based on the identification.

6. The method of claim 5, wherein the LNP database comprises a Number Portability Administration Center (“

NPAC”

) database.

7. The method of claim 5, wherein the target remote switch comprises at least one of a Class 4 softswitch, a hybrid Class 4/Class 5 softswitch, a Class 4/Class 5 (Time Division Multiplexing) TDM switch, and a Class 5 softswitch.

8. A system as recited in claim 5, wherein the signaling comprises a calling party field.

9. An article of manufacture comprising:

a computer readable medium including data that, when accessed by a computer communicably coupled with a voice over internet protocol (“

VoIP”

) network that is communicably coupled with a public switched telephone network (“

PSTN”

) and a plurality of remote switches, wherein each of the plurality of remote switches is located a remote network distinct from the VoIP network and the PSTN, cause the computer to perform operations comprising;

receiving a call from the PSTN having signaling including a called party number field and a location routing number (“

LRN”

) field;

determining whether a called party number of the signaling has been Local Number Portability (“

LNP”

) dipped, and if not, querying a LNP database with the called party number to identify a LRN for the LRN field associated with the called party number;

identifying a target remote switch of the plurality of remote switches that is associated with at least a portion of the LRN field, wherein the identifying the target remote switch further comprises querying an LRN/telephone number (“

TN”

) database within the VoIP network to identify the target remote switch that corresponds with at least a portion of the LRN field; and

sending the call to the target remote switch based on the identification.

10. The article of manufacture of claim 9, wherein the LNP database comprises a Number Portability Administration Center (“

NPAC”

) database.

11. The article of manufacture of claim 9, wherein the target remote switch comprises at least one of a Class 4 softswitch, a hybrid Class 4/Class 5 softswitch, a Class 4/Class 5 (Time Division Multiplexing) TDM switch, and a Class 5 softswitch.