Telephony transitioning system

• US 20040062377A1
• Filed: 10/01/2002
• Published: 04/01/2004
• Est. Priority Date: 10/01/2002
• Status: Active Grant

• Current Assignee: Genband US LLC (Ribbon Communications, Inc.)
• Original Assignee: Nortel Networks Limited (Nortel Networks Corporation)
• Inventors: Reaves, James E., Daoud, Naile S., Enns, Alvin P., Drover, Calvin E.
• Granted Patent: US 7,349,533 B2
• Time in Patent Office: Days
• US Class Current: 379/229
• CPC Class Codes: H04Q 2213/13097 Numbering, addressing
• CPC Class Codes: H04Q 2213/13109 Initializing, personal profile
• CPC Class Codes: H04Q 2213/13176 Common channel signaling, CCS7
• CPC Class Codes: H04Q 2213/1338 Inter-exchange connection
• CPC Class Codes: H04Q 3/0025 Provisions for signalling

Abstract

The present invention provides a Universal Signaling Point (USP) that acts as a liaison between a call signaling network and a number of switching entities, which support lines, trunks, or a combination thereof. During a transition of the lines or trunks from a donor entity to a host entity, call signaling between the host and donor entities and the SS7 network is routed through the USP. When transitioning the lines or trunks from the donor entity to the host entity, call signaling messages intended for the donor entity are routed to either the donor or host entity, whichever actually supports the lines or trunks. The USP is provided information indicative of whether a line or trunk has been transitioned to the host entity. The USP can compare information provided in the call signaling message with the transition information and route the message to the appropriate donor or host entity.

Claims

1. A method comprising:

a) intercepting a call signaling message associated with a telephony element originally associated with a donor switching system from a call signaling network, the telephony element being at least one of the group consisting of telephony lines and telephony trunks; and

b) routing the call signaling message to;

i) the donor switching system if the telephony element is supported by the donor switching system, and

ii) a host switching system if the telephony element has been transitioned to the host switching system.

2. The method of claim 1 further comprising providing a single point code or IP signaling address to the call signaling network that is identical to the original address assigned to the donor switching system, thereby eliminating a need for other signaling entities in the call signaling network to be provisioned with a new point code or signaling address for the host switching system.

3. The method of claim 1 further comprising storing information bearing on the transition of telephony elements from the donor switching system to the host switching system and wherein the routing of the call signaling message is based on the information.

4. The method of claim 1 further comprising monitoring identification indicia associated with the telephony element in the call signaling message and wherein the routing of the call signaling message is based on the identification indicia.

5. The method of claim 4 wherein the identification indicia is a directory number in a TCAP call signaling message for a telephony line.

6. The method of claim 4 wherein the identification indicia is a circuit identification code in an ISUP call signaling message for a telephony trunk.

7. The method of claim 1 wherein when the call signaling message is directed to a first point code for the donor switching system, the call is routed to either the donor or host switching system supporting the telephony element and further comprising routing the call signaling message to the host switching system when the call signaling message is directed to a second point code associated with the donor switching system.

8. The method of claim 1 wherein the call signaling message is received from one of a pair of signal transfer points, which originally supported the donor switching system.

9. The method of claim 1 further comprising receiving messages intended for entities in the call signaling network from the donor switching system and forwarding the messages across the call signaling network.

10. A method comprising:

a) providing a universal signaling point (USP) adapted to;

i) intercept a call signaling message associated with a telephony element originally associated with a donor switching system from a call signaling network, the telephony element being at least one of the group consisting of telephony lines and telephony trunks; and

ii) route the call signaling message to;

(1) the donor switching system if the telephony element is supported by the donor switching system, and

(2) a host switching system if the telephony element has been transitioned to the host switching system;

b) establishing signaling links between the USP and the host switching system, the donor switching system, and the call signaling network; and

c) configuring the call signaling network to deliver the call signaling message to the USP instead of the donor switching device.

11. The method of claim 10 further comprising configuring the donor switching system to send the call signaling message intended for the call signaling network to the USP instead of the call signaling network.

12. The method of claim 10 further comprising establishing an interworking trunk between the donor and host switching systems to support local calls between telephony elements supported by the donor and host switching systems.

13. The method of claim 10 further comprising transitioning telephony elements from the donor switching system to the host switching system and providing information bearing on the transition of the telephony elements from the donor switching system to the host switching system to the USP and wherein the routing of the call signaling message by the USP is based on the information.

14. The method of claim 10 further comprising monitoring identification indicia associated with the telephony element in the call signaling message and wherein the routing of the call signaling message by the USP is based on the identification indicia.

15. The method of claim 14 wherein the identification indicia is a directory number in a TCAP call signaling message for a telephony line.

16. The method of claim 14 wherein the identification indicia is a circuit identification code in an ISUP call signaling message for a telephony trunk.

17. The method of claim 10 wherein when the call signaling message is directed to a first point code for the donor switching system, the call signaling message is routed to the USP and forwarded to either the donor or host switching system supporting the telephony element and the USP routes the call signaling message to the host switching system when the call signaling message is directed to a second point code associated with the donor switching system.

18. The method of claim 17 wherein the host switching system can process the call signaling messages associated with the first and second point codes.

19. The method of claim 10 wherein the call signaling message is received from one of a pair of signal transfer points, which originally supported the donor switching system.

20. The method of claim 10 further comprising receiving messages intended for entities in the call signaling network from the donor switching system and forwarding the messages across the call signaling network.

21. An apparatus comprising:

a) at least one interface facilitating links to a host switching system, a donor switching system, and a call signaling network; and

b) a control system associated with the at least one interface and adapted to;

i) receive a call signaling message associated with a telephony element originally associated with the donor switching system from the call signaling network, the telephony element being at least one of the group consisting of telephony lines and telephony trunks; and

ii) route the call signaling message to;

(1) the donor switching system if the telephony element is supported by the donor switching system, and

(2) the host switching system if the telephony element has been transitioned to the host switching system.

22. The apparatus of claim 21 wherein a single point code or IP signaling address is provided to the call signaling network that is identical to the original address assigned to the donor switching system, thereby eliminating a need for other signaling entities in the call signaling network to be provisioned with a new point code or signaling address for the host switching system.

23. The apparatus of claim 21 wherein the control system is further adapted to store information bearing on the transition of telephony elements from the donor switching system to the host switching system and wherein the routing of the call signaling message is based on the information.

24. The apparatus of claim 21 wherein the control system is further adapted to monitor identification indicia associated with the telephony element in the call signaling message and wherein the routing of the call signaling message is based on the identification indicia.

25. The apparatus of claim 24 wherein the identification indicia is a directory number in a TCAP call signaling message for a telephony line.

26. The apparatus of claim 24 wherein the identification indicia is a circuit identification code in an ISUP call signaling message for a telephony trunk.

27. The apparatus of claim 21 wherein when the call signaling message is directed to a first point code for the donor switching system, the call is routed to either the donor or host switching system supporting the telephony element and the control system is further adapted to route the call signaling message to the host switching system when the call signaling message is directed to a second point code associated with the donor switching system.

28. The apparatus of claim 21 wherein the call signaling message is received from one of a pair of signal transfer points, which originally supported the donor switching system.

29. The apparatus of claim 21 wherein the control system is further adapted to receive messages intended for entities in the call signaling network from the donor switching system and forward the messages across the call signaling network.