# Patent

## Title
System and method for reducing toll charges to a customer service center using VoIP

## Abstract

A method and system are disclosed where a call center operator having multiple locations, including a call center is able to utilize existing network infrastructure to route telephone communications to the call center to the location where the lowest toll rate is applicable. The telephone communications are converted into data packets and routed to the call center using VoIP technology. No toll would apply to the transmission of the data to the call center.

## Background
CROSS REFERENCE TO RELATED APPLICATIONS
This application is related by subject matter to the subject matter disclosed in the following commonly assigned applications, the entirety of which are hereby incorporated by reference herein: U.S. patent application Ser. No. 11/319,959, filed on Dec. 28, 2005, and entitled SYSTEM AND METHOD FOR REDUCING TOLL CHARGES TO A CUSTOMER SERVICE CENTER USING VoIP; and U.S. patent application Ser. No. 11/319,837, filed on Dec. 28, 2005, and entitled SYSTEM AND METHOD FOR REDUCING TOLL CHARGES TO A CUSTOMER SERVICE CENTER USING VoIP.
TECHNOLOGY FIELD
The present disclosure relates to the field of telecommunications and more particularly to the use of voice over internet protocol (VoIP) to reduce toll charges to customer service centers.
BACKGROUND
The telecommunications industry is a highly regulated industry world wide. The rates charged for telephone call may very substantially because of the many rate setting regulatory entities involved. For example, in the United States a long distance call refers to telephone calls made outside a certain area, typically characterized by an area code outside of a local call area. Such long-distance calls carry long-distance charges (tolls) which may vary by nation and between phone companies. Calls between different countries (international calls) usually carry much higher charges.
In the United States, the regulatory scheme is rather complicated. Each State has a public utilities commission (PUC) that regulates public utilities, and that can, in the case of telephone services, set rates for calls taking place within the State. In addition, there is the concept of Local Access and Transport Area (LATA). A LATA is a “geographical area of the United States under the terms of “the Modification of Final Judgment (MFJ) entered by the United States District Court for the District of Columbia in Civil Action number 82-0192 or any other geographic area designated as a LATA in the National Exchange Carrier Association, Inc. Tariff FCC No. 4.” Thus there are two types of “long distance” calls. One is an inter-State call, the other is an intra-State inter LATA. LATA boundaries are usually drawn around markets, not necessarily along existing State or area code borders. Some LATAs cross over State boundaries, and area codes and LATAs do not necessarily share boundaries; many LATAs exist in multiple area codes, and many area codes exist in multiple LATAs.
Intra-State inter-LATA long distance refers to a calling area outside of the customer's local LATA but within the customer's State. The calling area may not served by the same carrier used for regular long distance, or may be provided at different rates. Typically, an intra-State inter-LATA long distance can be billed at a higher per-minute rate than inter-State long-distance calls, despite being a shorter distance.
Many companies operate customer service centers where customers can call for information, product support or to initiate a transaction. Typically, these customer service centers operate as a call center or centralized office that answers incoming telephone calls from customers. Call centers operated by a company may be at a single location, or be linked with other centers. Call centers may also be linked to corporate computer networks. The call center may be accessed through a toll-free telephone number so that the calling party is not charged for the call by the carrier. Instead the company operating the call center pays the charges. When a toll free number is dialed the carrier determines where the actual physical destination by using the intelligent network capabilities embedded into the network. The toll-free number is translated into a regular geographic number and routed by the telephone exchange in the normal way. In a call center the call is then typically answered by a telephone system known as an automatic call distributor (ACD) or private branch exchange (PBX). Subsequent routing of the calls are determined by the call center. For example, the call may routed depending upon the location of the caller. Many companies take advantage of the difference in inter-State rates versus intra-State inter-LATA rates by routing call out of State where the rates may be less.
Companies having call centers have a need to take advantage of existing network infrastructure to ensure that toll calls are routed though the lowest cost locations in their system. There is also a need to integrate voice and data communication networks into the operations of call centers to derive the maximum economic benefit.
SUMMARY
Accordingly, a system and method is disclosed for managing voice transmissions in a telecommunication system. The method includes the steps of routing voice transmissions directed to a first destination, to a location where the lowest toll would apply. The voice transmissions are converted into data packets and rerouted back to the first destination over an IP network, where the data packets are converted back to voice signals.
The system includes an IP network connecting a data network in the first destination to the location where the lowest toll would apply. VoIP technology is used to convert the voice communication to data packets that can be transmitted to the first destination. The system and method enable calls to call centers to be accomplished at the lowest rate.



BRIEF DESCRIPTION OF THE DRAWINGS
A more complete appreciation of the system and method and many of the attendant advantages thereof will be readily obtained as the same becomes better understood by reference to the following detailed description when considered in connection with the accompanying drawing; it being understood that the drawings contained herein are not necessarily drawn to scale; wherein:
FIG. 1 a high-level illustration of the system for reducing toll charges.
FIG. 2 a more detailed illustration of the system for reducing toll charges and their components.
FIG. 3 is a flow diagram of the method for reducing toll charges.



DETAILED DESCRIPTION OF ILLUSTRATIVE EMBODIMENTS
Illustrated in FIG. 1 is a system 11 for reducing toll charges to a customer service center in accordance with this disclosure. The system 11 includes a call center 12 having a first local network (call center network) 13 at location 1, that operates as a call center to respond to calls placed by a customer from a customer telephone 15, through a public switched telephone network (PSTN) 17. The system 111 also includes at least one other local network 19 at location 2 that can receive and process calls from PSTN 17. A voice over internet protocol (VoIP) subsystem 20 is included in the network 19. Network 19 and call center network 13 are connected through a packet switched network 21. Examples of packet switched networks include the internet and private networks that carry data in Transmission Control Protocol/Internet Protocol (TCP/IP). TCP/IP is a set of communications protocols used to connect hosts on the Internet. TCP/IP uses several protocols including TCP and IP. TCP/IP is the de facto standard for transmitting data over networks. A protocol is an agreed format for transmitting data between two devices that determines the type of error checking to be used; data compression method, if any; how the sending device will indicate that it has finished sending a message; how the receiving device will indicate that it has received a message. Clearly there are a number of standard protocols from which programmers can choose. Each has particular advantages and disadvantages.
The system 11 operates in an environment that includes PSTN 17 and a call router 21. The call router 21 routes the call depending on the nature of the call. It should be noted that Area Code Routing (i.e. routing toll-free calls based on the area code of the caller) is a service that is provided by most carriers. So the call router 21 may be operated by the carrier and may be part of the PSTN 17. If the Rate A applicable to calls from customer telephone 15 to call center 12 is lower than the rate B applicable to calls from customer telephone 15 to location 2 then the router would route the call to call center 12. If the Rate B applicable to calls from customer telephone 15 to Location 2 is lower than the rate A applicable to calls from customer telephone 15 to location 1 then the router would route the call to network 19. If the call is routed to Network 19, then a VoIP subsystem 20 would receive the call and convert the voice communication of the call into data packets (using existing VoIP technology) that would be transmitted over the packet switched network 21 to call center network 13.
Voice over Internet Protocol is the routing of voice conversations over the Internet or any other IP-based network. The voice data flows over a general-purpose packet-switched network, instead of traditional dedicated, circuit-switched voice transmission lines. In packet switching, packets (units of information carriage) are individually routed between nodes over data links which might be shared by many other nodes. Packet switching results in the optimization of bandwidth available in a network, and minimizes the time it takes for data to pass across the network. In a packet switched network, a stream of data (e.g. voice transmissions) is broken up into smaller groups of data known as packets. Packets include information about the origin, destination and sequence of the original data. The sequence is needed for re-assembly, at the files destination.
Protocols used to carry voice signals over the IP network are commonly referred to as Voice over IP or VoIP protocols. VoIP traffic might be deployed on any IP network, including the Internet or a private IP network. In general, phone service via VoIP costs less than equivalent service from traditional sources.
An example of such a system 11 would be a call center 12 located in Tampa, Fla. and a network 19 located at a corporate headquarters in San Antonio, Tex. Calls made by customer telephone 15 located in Miami, Fla. to call center 12 located in Tampa, would be charged at a higher rate than calls made from Miami, Fla. to San Antonio, Tex. If the carrier determines that the call is coming from a customer in Miami, then the call would be routed to the network 19 in San Antonio (Location 2). The call would be received by the VoIP subsystem 20 on the network 19 and the voice signal of the call would be converted to IP packets and transmitted over the packet switched network 21 to the call center 12 in Tampa where they are received and handled by a VoIP telephone receiver.
FIG. 2 provides a more detailed illustration of the components of the system 11. As illustrated in FIG. 2, the call center network 13 may include a Voice over IP private branch exchange (VoIP PBX) 23. VoIP PBX 23 interoperates with most SIP telephones, acting both as registrar and as a gateway between IP phones and the PSTN 17. Like any PBX, VoIP PBX 23 allows a number of attached telephones to make calls to one another, and to connect to other telephone services including the PSTN. Although in this example reference is made to a VoIP PBX a regular PBX that has been IP-enabled, or a server running specialized software would also be able to provide the same function. Many commercially available VoIP PBX's include the capability to convert the analog phone signals into digital signals that can be sent over the call center network 13 and the packet switched network 21. The VoIP PBX 23 may support a wide range of Voice over IP protocols, including SIP and H.323. The call center network 13 also may include at least one wide area network (WAN) gateway 25. WAN gateway 25 is a network node equipped for interfacing with the packet switched network 21. The WAN gateway may contain devices such as protocol translators, impedance matching devices, rate converters, fault isolators, or signal translators as necessary to provide system interoperability.
The call center network may also include one or more local area network (LAN) router 27, a plurality of telephones 29 and a plurality of work stations computers 31. LAN router 27 directs the traffic of the data packets within call center network 13. Telephones 29 may be VoIP telephones or may combine VoIP and analog phone functions in a single device.
Network 19 has similar basic representative components, including a VoIP PBX 33 (or equivalent), a WAN gateway 35 (or equivalent device to connect to the packet switched network 21); a LAN router 37, telephones 19 and computers 41. In operation, voice data from a call routed to the network 19 would be converted into data packets by VoIP PBX 33 and transmitted over the packet switched network 21 to the call center network 13. VoIP PBX 23 would route the data to the IP telephone 29 of the appropriate customer representative, where the data would be converted to voice signals. Similarly voice signals for the customer representative using telephone 29 would be converted to data packets transmitted though the packet switched network 21, converted back to voice signals in network 19 and routed though the PSTN network 17 to the customer using customer telephone 15.
FIG. 3 is a flow diagram of the process implemented by the system in the United States. A customer places a call to a 1-800 number in step 51. The carrier determines which the network that will receive the call in step 53. If the caller and the call center are in the same State and LATA the call would be routed to an out of State network in step 55. The out of State network would convert the analog (or digital) voice communication into digital packets usually thorough the VoIP PBX. The VoIP PBX would route the packets thorough the IP network to the call center in step 59. The packets would then be converted to analog signals in step 61. The end result is that an intra-State Inter LATA call is accomplished at inter-State rates. Although in this example the regulatory scheme applicable to the United States is described, this process would also work where there is a discrepancy in the rates applicable for PSTN calls between any two locations, such as two countries.
It should be understood that the present system and method may utilize any number of hardware components and that the present system and method is not limited to those explicitly described herein.
Although the system and method have been described with reference to specific embodiments, this description is not meant to be construed in a limited sense. Various modifications of the disclosed embodiments, as well as alternative embodiments of the system and method, will become apparent to persons skilled in the art upon reference to the detailed description. It is, therefore, contemplated that the appended claims will cover such modifications that fall within the scope of the description.

## Claims

1. A system for reducing toll charges for voice communication calls to a customer support entity having at least a first location and a second location, comprising:
a connection to a toll network;
a connection to a packet switched network;
at least one subsystem that recognizes a call to the first location that bears a higher toll than if the call was placed to the second location;
at least one subsystem that redirects the call to the second location only if a call to the first location bears a higher toll than a call to the second location;
at least one subsystem that receives data packets representing voice of a caller to the customer support entity from the second location;
at least one subsystem that converts the data packets into an analog signal;
at least one subsystem that transmits the analog signal to a customer support representative in the first location; and
at least one subsystem that converts the voice communications of the customer support representative into data packets.

2. The system of claim 1 wherein said subsystem that converts the voice communications of the customer support representative into data packets comprises:
at least one subsystem that converts analog phone signals to digital signals; and
at least one subsystem that transforms said digital signals into data packets.

3. The system of claim 1 wherein said subsystem that recognizes a call to the first location that bears a higher toll than if the call was placed to the second location comprises:
at least one subsystem that determines the originating location of the call;
at least one subsystem that identifies a first rate applicable to calls made from the originating location to the first location;
at least one subsystem that identifies a second rate applicable to calls made from the originating location to the second location; and
at least one subsystem that selects the destination of the call based on the lowest of the first and second rates.

4. The system of claim 1 wherein said subsystem that receives the data packets over the packet switched network comprises at least one subsystem that receives the data packets over the packets switched network using TCP/IP protocols.

5. The system of claim 1 wherein said subsystem that receives the data packets to a voice signal comprises at least one subsystem that:
at least one subsystem that converts the data packets into a digital signal and;
at least one subsystem that converts the digital signal into an analog sound signal.

6. The system of claim 1 further comprising at least one subsystem that connects a local area network with the connection to the packet switched network.

7. The system of claim 6 wherein said subsystem that connects the local area network with the connection to the packet switched network comprises at least one subsystem that interfaces with the packet switched network using TCP/IP protocols.

8. A method for reducing toll charges for voice communication calls to a customer support entity having at least a first location and a second location, comprising:
recognizing a call to the first location that bears a higher toll than if the call was placed to the second location;
redirecting the call to the second location only if a call to the first location bears a higher toll than a call to the second location;
connecting with a packet switched network at the first location;
receiving data packets representing voice of a caller to the customer support entity over the packet switched network from the second location;
converting the data packets into an analog signal;
transmitting the analog signal to a customer support representative; and
converting the customer representative voice signal into data packets.

9. The method of claim 8 wherein said method element for converting the customer representative voice signal into data packets comprises:
converting analog phone signals to digital signals; and
transforming said digital signals into data packets.

10. The method of claim 8 wherein said method element for recognizing a call to the first location that bears a higher toll than if the call was placed to the second location comprises:
determining the originating location of the call;
identifying a first rate applicable to calls made from the originating location to the first location;
identifying a second rate applicable to calls made from the originating location to the second location; and
selecting the destination of the call based on the lowest of the first and second rates.

11. The method of claim 8 wherein said method element for receiving the data packets over the packet switched network comprises receiving the data packets over the packet switched network using TCP/IP protocols.

12. The method of claim 8 wherein said method element for converting the data packets into an analog signal comprises:
converting the data packets into a digital signal and;
converting the digital signal into an analog sound signal.

13. The method of claim 8 wherein said method element for connecting with the packet switched network comprises
connecting a local area network with the packet switched network.

14. The method of claim 13 wherein said method element for connecting the local area network with the packet switched network comprises interfacing with the packet switched network using TCP/IP protocols.

15. A computer-readable medium comprising computer-readable instructions for reducing toll charges for voice communication calls to a customer support entity having at least a first location and a second location, said computer-readable instructions comprising:
instructions to recognize a call to the first location that bears a higher toll than if the call was placed to the second location;
instructions to redirect the call to the second location only if a call to the first location bears a higher toll than a call to the second location;
instructions to connect with a packet switched network at the first location;
instructions to receive data packets representing voice of a caller to the customer support entity over the packet switched network;
instructions to convert the data packets into an analog signal;
instructions to transmit the analog signal to a customer support representative; and
instructions to convert the voice communications of the customer support representative into data packets.

16. The computer readable medium of claim 15 wherein said instructions to convert the voice communications of the customer support representative into data packets comprises:
instructions to convert analog phone signals to digital signals; and
instructions to transform said digital signals into data packets.

17. The computer readable medium of claim 15 wherein said instructions to recognize a call to the first location that bears a higher toll than if the call was placed to the second location comprises:
instructions to determine the originating location of the call;
instructions to identify a first rate applicable to calls made from the originating location to the first location;
instructions to identify a second rate applicable to calls made from the originating location to the second location; and
instructions to select the destination of the call based on the lowest of the first and second rates.

18. The computer readable medium of claim 15 wherein said instructions to receive the data packets over the packet switched network comprise instructions to receive the packets over the packet switched network using TCP/IP protocols.

19. The computer readable medium of claim 15 wherein said instructions to convert the data packets to a voice signal comprise:
instructions to convert the data packets into a digital signal and;
instructions to convert the digital signal into an analog sound signal.

20. The computer readable medium of claim 15 wherein said instructions to connect with the packet switched network comprise instructions to
connect a local area network with the packet switched network.

21. The computer readable medium of claim 20 wherein said instructions to connect the local area network with the packet switched network comprises instructions to interface with the packet switched network using TCP/IP protocols.