Method and device for providing intermediate telephone service with enhanced network reliability

• US 6,393,122 B1
• Filed: 08/31/1998
• Issued: 05/21/2002
• Est. Priority Date: 08/31/1998
• Status: Expired due to Term

• Current Assignee: RPX Clearinghouse LLC (RPX Corporation)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Belzile, Pierre
• Primary Examiner(s): Tsang, Fan
• Assistant Examiner(s): Escalante, Ovidio
• Application Number:
  US09/144,109
• Time in Patent Office: 1,359 Days
• Field of Search: 379/258, 379/230, 379/211, 379/219, 379/220.01, 379/221.14, 379/229, 379/242, 379/227
• US Class Current: 379/258
• CPC Class Codes: H04M 3/02 Calling substations, e.g. by ringing selective calling H04Q
• 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 3/53325 Interconnection arrangements between voice mail systems
• CPC Class Codes: H04M 7/00 Arrangements for interconnection between switching centres

Abstract

A method and server for providing intermediate telephone call notification services while increasing the reliability of other call handling services is disclosed. Calls including called party identifier are received at a switch (16,28) forming part of a network (26). The calls are forwarded to a first available notification server (12, 18, 34) in communication with the switch (12, 18, 34), preferably using pre-configured route lists. Each server (12, 18, 34) is capable of providing call notification service for at least some subscribers (10, 22, 30). A server (12, 18, 34) receives a call, including a called subscriber identifier and determine whether the call should be processed as a call for a primary or a secondary subscriber. For calls for a primary subscriber, the server (12, 18, 34) dispatches an indicator of the call. For a call to a secondary subscriber the server forwards the call to a call handling system, such as a voice mail server (36, 38, 40), interconnected with the network.

Claims

1. A method of operating first and second servers on a telephony network, each of said first and second servers operable to provide a subscribed telephony service in response to receiving incoming calls for specified subscribers prior to said incoming calls being processed at one or more additional call handling systems, said method comprising:

associating with said first server a first plurality of primary subscribers for whom said subscribed telephony service is to be provided by said first server;

associating with said second server, a second plurality of primary subscribers for whom said subscribed telephony service is to be provided by said second server, said first plurality being different from said second plurality;

receiving an incoming call for one of said first plurality of primary subscribers, at said first server,

in response to said receiving an incoming call for said one of said first plurality of primary subscribers, providing said subscribed telephony service to said incoming call for said one of said first plurality of plurality subscribers at said first server;

receiving an incoming call for one of said second plurality of primary subscribers, at said first server, in the event of unavailability of said second server;

forwarding said incoming call for said one of sad second plurality of primary subscribers from said first server to a downstream call handling system within said telephony network associated with said one of said second plurality of primary subscribers, thereby ensuring access to said downstream call handling system for calls for said second plurality of primary subscribers in the event of unavailability of said second server.

2. The method of claim 1, further comprising

receiving an incoming call for one of said second plurality of subscribers, at said second server;

in response to said receiving an incoming call for said one of said second plurality of primary subscribers, providing said subscribed telephony service to said incoming call for said one of said second plurality of primary subscribers at said second server;

receiving an incoming call for one of said first plurality of primary subscribers, at said second server, in the event of unavailability of said first server;

forwarding said incoming call for said one of said first plurality of primary subscribers from said second server to a downstream call handling system within said telephony network associated with said one of said first plurality of primary subscribers thereby ensuring access to said downstream call handling system for calls for said first plurality of primary subscribers in the event of unavailability of said first server.

3. The method of claim 2, wherein said subscribed telephony service comprises dispatching an indicator of an incoming call to a subscriber to whom said incoming call is destined.

4. The, method of claim 1, wherein each incoming call further comprises an identifier of a called subscriber.

5. The method of claim 4, further comprising comparing an identifier of a called subscriber of said incoming call for said one of said second plurality of subscribers at said first server to entries within a subscriber database at said first server.

6. The method of claim 5, further comprising comparing an identifier of a called subscriber of said incoming call for said one of said first plurality of subscribers at said fist server to entries within said subscriber database at said first server.

7. The method of claim 1, wherein said providing said subscribed telephony service comprises dispatch an indicator of said incoming call for said on of said first plurality of primary subscribers over a second network.

8. The method of claim 7, wherein said second network comprises a data network.

9. The method of claim 1, wherein said downstream call handling system comprises a voice mail system associated with said one of said second plurality of primary subscribers.

10. The method of claim 9, wherein an identifier of said voice mail system for said primary subscribers is maintained at said first server, and used to forward said incoming call for said one of said second plurality of primary subscribers.

11. The method of claim 1, wherein said first server is identified by first and second dial numbers on said telephone network, and an incoming call for one of said first plurality of primary subscribers is distinguished from an incoming call for one of said second plurality of primary subscribers by distinguishing between said first and second dial numbers.

12. A method of operating a first server on a telephony network, said telephony network comprising said first server and a second server, each operable to provide a subscribed telephony service in response to receiving incoming call for specified subscribers prior to said incoming calls being processed at one or more additional call handling systems, said method comprising:

associating with said first server a first plurality of primary subscribers for whom said subscribed telephony service is to be provided by said first server,

receiving an incoming call for one of said first plurality of primary subscribers, at said fist server;

in response to said receiving said incoming call for said one of said first plurality of primary subscribers, providing said subscribed telephony service to said incoming call for said one of said first plurality of primary subscribers at said first server;

receiving an incoming call for one of a second plurality of primary subscribers for whom said subscribed telephony service is provided by said second server, at said first server, in the event of unavailability of said second server;

in response to receiving said incoming call for said one of said second plurality of primary subscribers, forwarding said incoming call for said one of said second plurality of primary subscribers from said first server to a downstream call handling system within said telephony network associated with said one of said second plurality of primary subscribers, without providing said subscribed telephony service to said incoming call for said one of said second plurality of primary subscribers at said first server, thereby ensuring access to said downstream call handling system for calls for said second plurality of primary subscribers in the event of unavailability of said second server.