SYSTEM AND METHOD FOR ROUTING CALLS ASSOCIATED WITH PRIVATE DIALING PLANS

• US 20140064268A1
• Filed: 11/11/2013
• Published: 03/06/2014
• Est. Priority Date: 01/30/2009
• Status: Active Grant

• Current Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Original Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Inventors: Terpstra, Rich, Moore, Richard
• Granted Patent: US 9,596,101 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 12/66 Arrangements for connecting between networks having differing types of switching systems, e.g. gateways
• CPC Class Codes: H04M 3/42297 with number portability
• CPC Class Codes: H04M 7/0075 Details of addressing, directories or routing tables

Abstract

Methods and systems for routing a call including a destination number associated with a PDP including a routing engine operable to route the call to a PDP call resolution server, and a first switch operable to receive an egress path identifier and a PDP telephone number from the PDP call resolution server, the egress path identifier identifying an egress path for routing the call to a destination endpoint associated with the destination number, and the PDP telephone number identifying a selected PDP destination endpoint and a second switch operable to receive the call based on the egress path identifier and route the call to the selected PDP destination endpoint using the PDP telephone number.

Claims

1. A computer-implemented method for establishing a call from a first network to a second network, wherein the call is directed to a destination telephone number associated with a private dialing plan (PDP), the method comprising:

querying a PDP call resolution service operable to select an internal egress path identifier from a plurality of internal egress path identifiers, the selected internal egress path identifier associated with the destination telephone numbers of the PDP;

responsive to the query, receiving the selected internal egress path identifier from the PDP call resolution service; and

routing the call to a destination endpoint associated with the destination telephone number via a egress path identified by the selected internal egress path identifier.

2. The computer-implemented method of claim 1, wherein the first network comprises a first Private Branch Exchange (PBX) and the second network comprises a second PBX.

3. The computer-implemented method of claim 1, wherein the call comprises a toll-free call, and wherein the second network comprises a toll-free service provider network.

4. The computer-implemented method of claim 1, wherein the PDP call resolution service resides in a third network.

5. The computer-implemented method of claim 1, wherein the querying comprises establishing a first leg of the call and wherein the routing comprises establishing a second leg of the call.

6. The computer-implemented method of claim 1, wherein the querying and the routing comprise establishing a single calling leg.

7. A computer-implemented method for establishing a call associated with a private dialing plan, the method comprising:

receiving a call directed to a destination endpoint associated with a private dialing plan (PDP);

requesting an internal egress path identifier;

responsive to the requesting, receiving the internal egress path identifier from a call resolution server associated with the destination endpoint; and

routing the call to an egress path identified by the internal egress path identifier.

8. The computer-implemented method of claim 7, wherein the internal egress path identifier comprises a routing number (RN).

9. The computer-implemented method of claim 7, wherein the call is established over a single calling leg.

10. A system for routing a call including a destination number associated with a private dialing plan (PDP) where the routing is otherwise unknown and not available from the DNIS, the system comprising:

a routing engine operable to route the call to a PDP call resolution server;

a first switch, in communication with the PDP call resolution server, operable to receive an egress path identifier and a PDP telephone number from the PDP call resolution server in communication with a private dialing plan information server, the egress path identifier identifying an egress path for routing the call to a destination endpoint associated with the destination number, and the PDP telephone number identifying a selected PDP destination endpoint; and

a second switch operable to receive the call based on the egress path identifier and route the call to the selected PDP destination endpoint using the PDP telephone number.

11. The system of claim 10, wherein the egress path identifier comprises a Plain Old Telephone System (POTS) Number.

12. The system of claim 11, wherein the POTS Number corresponds to an internal Routing Number.