Tandem access controller within the public switched telephone network
View Patent ↗A system that includes a tandem access controller (TAC) coupled to the PSTN, where the TAC allows a subscriber to set-up and change the configuration of the phone line or other communications device, including selective call forwarding, using the web. The TAC is coupled internally to the PSTN in a local service area and is outside the central office of the subscriber. A calling party makes a first call to the subscriber using the subscriber's public telephone number. The TAC receives the first call prior to the call reaching the subscriber's terminating central office, which in some cases avoids a toll. The TAC then carries out the subscriber's instructions for the first call, such as making one or more second calls using telephone numbers different from the subscriber's public telephone number. When the second call is answered, the answering phone is connected by the TAC to the caller.
1. A method of executing control criteria for routing of calls from a first communication network through a second communication network, wherein the second communication network is different from the first communication network, comprising the steps of:
providing a controller with access to at least the first and second communication networks, wherein at least one of the first or second communication networks is a packet network configured to support voice over IP (VOIP), the controller configured to receive signaling messages indicating a first call from the first communication network to an address of a communications device via the second communication network;
retrieving control criteria from a database to which the controller has access, based on the first call, wherein the control criteria is derived from entries previously made via a web server; and
processing the first call by implementing the control criteria to route a second call leg in accordance with the control criteria to the address for the communications device;
facilitating a connection via the controller between the first call and the second call leg, when the call is answered, thereby, establishing an interconnection in accordance with the control criteria.
2. The method of claim 1 , wherein the second communication network is coupled to a switching facility of a network comprising edge switches for routing calls from and to communications devices within a local geographic area and switching facilities for routing calls to other edge switches or other switching facilities local or in other geographic areas.
3. The method of claim 2 , wherein the switching facility performs a class 4 switching function.
4. The method of claim 2 , wherein the switching facility is a tandem switch.
5. The method of claim 2 , wherein the switching facility employs a signaling transfer point (STP).
6. The method of claim 2 , wherein the controller is a tandem access controller (TAC).
7. The method of claim 1 , wherein both the first and at least the second communication networks are packet networks configured to support voice over IP (VOIP).
8. The method of claim 1 , wherein the signaling messages include a VOIP signaling protocol.
9. The method of claim 1 , wherein the signaling messages include the SS7 protocol.
10. The method of claim 1 , wherein the control criteria include security measures.
11. The method of claim 10 , wherein the security measures include the prevention of denial of service attacks.
12. The method of claim 10 , wherein the security measures include no direct access to the gateway.
13. The method of claim 10 , wherein the security measures include an additional security layer to prevent hacking.
14. The method of claim 10 , wherein the security measures include VOIP link degradation detection.
15. The method of claim 10 , wherein the security measures include automatic cutover to the PSTN.
16. The method of claim 10 , wherein the security measures include conditional call blocking.
17. The method of claim 10 , wherein the security measures include call logging.
18. The method of claim 10 , wherein the security measures include authentication of the calling party.
19. The method of claim 1 , wherein the controller comprises a distributed architecture including one or more subsystems.
20. The method of claim 19 , wherein a subsystem includes protocol conversion of VOIP voice packets.
21. The method of claim 19 , wherein a subsystem includes protocol conversion of FAX packets.
22. The method of claim 19 , wherein a subsystem includes a digital processing system.
23. The method of claim 22 , wherein the digital processing system performs voice recognition.
24. The method of claim 22 , wherein the digital processing system provides call progress tones.
25. The method of claim 22 , wherein the digital processing system performs touchtone detection.
26. The method of claim 22 , wherein the digital processing system provides voice announcements.
27. The method of claim 19 , wherein the connection is performed, at least in part, by a subsystem.
28. The method of claim 1 , wherein the address for the called party includes an IP address.
29. The method of claim 1 , wherein the address for the called party address includes a telephone number.
30. The method of claim 1 , wherein the address for the called party includes a character string.
31. The method of claim 1 , wherein the controller terminates the first call.