Advanced voice communication feature transparency in a telecommunications network

• US 7,596,131 B1
• Filed: 06/09/2006
• Issued: 09/29/2009
• Est. Priority Date: 06/30/1998
• Status: Expired due to Term

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: West, Andrew H., Kingston, Adrian R., Volftsun, Lev, Rednor, Fred R., Neighbors, Clay H., Rabinovitch, Mikhail
• Primary Examiner(s): PHAM, BRENDA H
• Application Number:
  US11/450,029
• Time in Patent Office: 1,208 Days
• Field of Search: 370351-358, 370/389, 370/373, 370/377, 370/384, 370/386
• US Class Current: 370/352
• CPC Class Codes: H04L 12/4641 Virtual LANs, VLANs, e.g. virtual private networks [VPN] LAN interconnection over a bridge based backbone H04L12/462; encapsulation techniques H04L12/4633; routing of packets H04L45/00; packet switches H04L49/00; virtual private networks for security H04L63/0272
• CPC Class Codes: H04L 12/5692 Selection among different networks
• CPC Class Codes: H04M 7/009 in systems involving PBX or KTS networks
• CPC Class Codes: H04Q 3/0029 Provisions for intelligent networking

Abstract

An auxiliary communication network is introduced into a virtual private network for passing signaling messages that present features not supported by the public, primary communication network portion of the virtual private network. Protocol converters are positioned within the virtual private network to intercept signaling messages, establish a connection through the auxiliary network, determine whether the intercepted messages present unsupported features, and, in which case, route corresponding feature requested through the auxiliary communication network. Preferably, the auxiliary network connection is established in a direction reverse to and in response to the primary network connection.

Claims

1. An apparatus, comprising:

a communications interface;

one or more processors coupled to said communications interface; and

a memory coupled to said one or more processors and storing instructions which, when executed with said one or more processors, cause said one or more processors to allow an advanced voice communication feature in a virtual private network with program functions that comprise;

determining, upon a call connected between a first and a second private network of said virtual private network through a first communication network, that a signaling message from said first private network invokes said advanced voice communication feature; and

in response to the determining that a signaling message from said first private network invokes said advanced voice communication feature, establishing an auxiliary connection between said first and said second private networks through a second communication network wherein said auxiliary connection supports said advanced voice communication feature and the first communication network does not;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.

2. The apparatus as recited in claim 1 wherein said virtual private network supports voice and data communications.

3. The apparatus as recited in claim 1 wherein said first communication network supports at least one of voice communications and data communications.

4. The apparatus as recited in claim 1 wherein said communications interface comprises:

a first communications interface component that communicatively couples said first private network with said first communications network; and

a second communications interface component that communicatively couples said first private network with said second communications network to support said auxiliary connection, wherein said signaling message from said first private network comprises a first protocol and wherein said program functions further comprise;

converting said signaling message from said first protocol to a second signaling message in a second protocol, said second protocol for handling messages that pass sufficient information to implement said advanced voice communication feature; and

transmitting, with said second communications interface, said second signaling message between said first private network and said second private network with said auxiliary connection through said second communication network.

5. The apparatus as recited in claim 1 wherein said auxiliary connection and said second communication network support voice communications and data communications.

6. The apparatus as recited in claim 1 wherein said first communication network comprises a public switched telephone network.

7. The apparatus as recited in claim 1 wherein said communications interface functions to receive said signaling message and wherein said program functions further comprise:

intercepting said signaling message from at least one of said first and said second private networks wherein;

upon intercepting said signaling message from said first private network, said first private network comprises a source of said call; and

upon intercepting said signaling message from said second private network, said second private network comprises a destination of said call.

8. A method for allowing an advanced voice communication feature in a virtual private network, comprising:

determining, upon a call connected between a first and a second private network of said virtual private network through a first communication network, that a signaling message from said first private network invokes said advanced voice communication feature; and

in response to the determining that a signaling message from said first private network invokes said advanced voice communication feature, establishing an auxiliary connection between said first and said second private networks through a second communication network wherein said auxiliary connection supports said advanced voice communication feature and the first communication network does not;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.

9. The method as recited in claim 8 wherein said virtual private network supports voice and data communications.

10. The method as recited in claim 8 wherein said first communication network supports at least one of voice communications and data communications.

11. The method as recited in claim 8 wherein said signaling message from said first private network comprises a first protocol, said method further comprising:

converting said signaling message from said first protocol to a second signaling message in a second protocol, said second protocol for handling messages that pass sufficient information to implement said advanced voice communication feature; and

transmitting said second signaling message between said first private network and said second private network with said auxiliary connection through said second communication network;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.

12. The method as recited in claim 8 wherein said auxiliary connection and said second communication network support voice communications and data communications.

13. The method as recited in claim 8 wherein said first communication network comprises a public switched telephone network.

14. The method as recited in claim 8, further comprising:

intercepting said signaling message from at least one of said first and said second private networks wherein;

upon intercepting said signaling message from said first private network, said first private network comprises a source of said call; and

upon intercepting said signaling message from said second private network, said second private network comprises a destination of said call.

15. A computer readable storage medium having encoded therewith computer readable code that comprises instructions, which when executed with a processor cause said processor to allow an advanced voice communication feature in a virtual private network with program functions that comprise:

determining, upon a call connected between a first and a second private network of said virtual private network through a first communication network, that a signaling message from said first private network invokes said advanced voice communication feature; and

in response to the determining that a signaling message from said first private network invokes said advanced voice communication feature, establishing an auxiliary connection between said first and said second private networks through a second communication network wherein said auxiliary connection supports said advanced voice communication feature and the first communication network does not;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.

16. The computer readable storage medium as recited in claim 15 wherein said signaling message from said first private network comprises a first protocol, said program functions further comprising:

converting said signaling message from said first protocol to a second signaling message in a second protocol, said second protocol for handling messages that pass sufficient information to implement said advanced voice communication feature; and

transmitting said second signaling message between said first private network and said second private network with said auxiliary connection through said second communication network.

17. The computer readable storage medium as recited in claim 15, wherein said program functions further comprise:

intercepting said signaling message from at least one of said first and said second private networks wherein;

upon intercepting said signaling message from said first private network, said first private network comprises a source of said call; and

upon intercepting said signaling message from said second private network, said second private network comprises a destination of said call.

18. An apparatus for allowing an advanced voice communication feature in a virtual private network, comprising:

means for determining, upon a call connected between a first and a second private network of said virtual private network through a first communication network, that a signaling message from said first private network invokes said advanced voice communication feature; and

means for establishing an auxiliary connection between said first and said second private networks through a second communication network upon said connecting said call, wherein the establishing occurs in response to the determining that a signaling message from said first private network invokes said advanced voice communication feature, and further wherein said auxiliary connection supports said advanced voice communication feature and the first communication network does not;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.

19. The apparatus as recited in claim 18 wherein said signaling message from said first private network comprises a first protocol, said apparatus further comprising:

means for converting said signaling message from said first protocol to a second signaling message in a second protocol, said second protocol for handling messages that pass sufficient information to implement said advanced voice communication feature; and

means for transmitting said second signaling message between said first private network and said second private network with said auxiliary connection through said second communication network.

20. The apparatus as recited in claim 18, further comprising:

means for intercepting said signaling message from at least one of said first and said second private networks wherein;

upon intercepting said signaling message from said first private network, said first private network comprises a source of said call; and

upon intercepting said signaling message from said second private network, said second private network comprises a destination of said call.

21. A system that allows an advanced voice communication feature, comprising:

a virtual private network that comprises a first and a second private network, each of which support said advanced voice communication feature;

a first communication network that communicatively couples said first and said second private networks;

a second communication network that communicatively couples said first and said second private networks and supports said advanced voice communication feature wherein said advanced voice communication feature is unsupported with said first communications network; and

a protocol converter coupled to said first private network and comprising;

a first communications interface that communicatively couples said first private network and said first communications network;

a second communications interface that communicatively couples said first private network and said second communications network in a protocol that suffices to implement said advanced voice communications feature;

a processor coupled to said first and said second communications interfaces; and

a memory coupled to said processor and storing instruction code, which when executed with said processor, cause said processor to allow said advanced voice communication feature in said virtual private network with program functions that comprise;

determining, upon a call connected between said first and said second private networks through said first communication network, that a signaling message from said first private network invokes said advanced voice communication feature; and

in response to the determining that a signaling message from said first private network invokes said advanced voice communication feature, establishing an auxiliary connection between said first and said second private networks through a second communication network wherein said auxiliary connection supports said advanced voice communication feature and the first communication network does not;

wherein said advanced voice communication feature comprises at least one of a call-waiting function, a call-forwarding function, a three-way-calling function and a function relating to a custom calling feature.

22. The system as recited in claim 21 wherein said program functions further comprises:

intercepting said signaling message from at least one of said first and said second private networks wherein;

upon intercepting said signaling message from said first private network, said first private network comprises a source of said call; and

upon intercepting said signaling message from said second private network, said second private network comprises a destination of said call.