Screening inbound calls in a packet-based communications network

• US 20020159440A1
• Filed: 04/30/2001
• Published: 10/31/2002
• Est. Priority Date: 04/30/2001
• Status: Active Grant

• Current Assignee: Level 3 Communications LLC (Lumen Technologies, Inc.)
• Original Assignee: Level 3 Communications Incorporated (Lumen Technologies, Inc.)
• Inventors: McCabe, John Joseph, Mussman, Harry Edward, Singh, Tanushree
• Granted Patent: US 7,075,922 B2
• Time in Patent Office: Days
• US Class Current: 370/352
• CPC Class Codes: H04L 65/103 in the network
• CPC Class Codes: H04L 65/104 in the network
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/1104 Session initiation protocol [SIP]
• CPC Class Codes: H04L 65/1106 Call signalling protocols; H.323 and related
• CPC Class Codes: H04M 3/436 Arrangements for screening incoming calls , i.e. evaluating the characteristics of a call before deciding whether to answer it based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; diversion H04M3/54
• CPC Class Codes: H04M 7/0033 Notification or handling of incoming calls by a computer
• CPC Class Codes: 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
• CPC Class Codes: H04M 7/1235 where one of the core networks is a wireless network
• CPC Class Codes: H04M 7/126 Interworking of session control protocols
• CPC Class Codes: H04M 7/128 Details of addressing, directories or routing tables

Abstract

A method and system is provided for performing inbound call screening in a packet-based network, such as an H.323 Voice over IP (VoIP) network. The inbound gateways on the network are registered with inbound gatekeepers, and standard messages are used between an inbound gateway, an inbound gatekeeper and an inbound screening database to decide: whether an inbound call to a particular called number (DID) is to be allowed into the network; whether the called number should be translated into a different called number; and whether a routing index should be included in the called number to indicate the destination of the call.

Claims

1. A call screening database device for use in a packet-based communication network comprising:

one or more communication devices providing access to a gatekeeper;

a memory device including a screening database; and

a processor operable to receive a request from the gatekeeper through the one or more communication devices wherein the gatekeeper receives,

wherein in response to a received request, the processor performs call screening in conjunction with the screening database.

2. The call screening database of claim 1, wherein the processor performs call screening by querying the screening database, determining a response to the received request, and sending the response to the gatekeeper.

3. The call screening database device of claim 1, wherein at least one of the one or more communication devices provides access to a packet-based network.

4. The call screening database device of claim 3, wherein the packet-based network is an Internet protocol (IP) network.

5. The call screening database device of claim 1, wherein the memory device is random access memory (RAM).

6. The call screening database device of claim 1, wherein the memory device is a computer harddrive.

7. The call screening database device of claim 1, wherein the screening database is a flat file database.

8. The call screening database device of claim 1, wherein the screening database is a relational database.

9. The call screening database device of claim 1, wherein the screening database is an object-oriented database.

10. The call screening database device of claim 1, wherein the received request includes a dialed number, and determining a response to the received request includes:

determining whether the received request is permitted; and

creating a response number using the dialed number and the received request.

11. The call screening database device of claim 10, wherein sending the response to the gatekeeper includes sending the response number.

12. The call screening database device of claim 10, wherein the response number includes a routing index.

13. The call screening database device of claim 1 wherein the packet-based communication network includes one or more H.323 endpoints.

14. The call screening database device of claim 1, wherein the packet-based communication network includes one or more Session Initiation Protocol (SIP) endpoints.

16. The VoIP network of claim 15 wherein the packet network is an Internet Protocol (IP) network.

17. The VoIP network of claim 15 wherein the second endpoint is an H.323 endpoint.

18. The VoIP network of claim 15 wherein the second endpoint is a Session Initiation Protocol (SIP) endpoint.

19. The VoIP network of claim 15 wherein the call screening database device processes a call by:

receiving a query message requesting the location of the second endpoint;

querying the screening database using information from the query message; and

sending a response message based on a result of querying the screening database.

20. The VoIP network of claim 19 wherein the received message and the response message conform to the H.323 protocol.

21. The VoIP network of claim 19 wherein the received message and the response message conform to the Session Initiation Protocol (SIP).

15. A Voice over Internet Protocol (VOIP) network comprising:

a first endpoint connected to a packet network;

a gateway connected to the packet network; and

a call screening database device connected to the packet network, the call screening database device having a screening database residing in a memory for processing a call request from the first endpoint to a second endpoint.

22. A method of screening calls using a call screening database in a packet-based communication network, the method comprising:

receiving a call request in a gateway;

processing the call request in conjunction with a screening database residing in a memory of a screening database device; and

routing the call request in response to the process.

23. The method of claim 22 wherein processing the call request includes:

sending a message to a gatekeeper, the gatekeeper processing the message in conjunction with the screening database; and

receiving a message from the gatekeeper.