Telephone call routing and switching techniques for data communications

• US 5,761,281 A
• Filed: 07/30/1996
• Issued: 06/02/1998
• Est. Priority Date: 03/11/1994
• Status: Expired due to Fees

• Current Assignee: Quarterhill Inc. (f/k/a Wi-LAN Inc.)
• Original Assignee: 3Com Corporation (HP Inc.)
• Inventors: Tzeng, Lih-Shyng, Jones, Terrel, Suffern, Robert C., Schoo, Daniel L., Baum, Marc S., Jankus, Peter P., Balton, Donald
• Primary Examiner(s): WOO, STELLA L
• Application Number:
  US08/688,403
• Time in Patent Office: 672 Days
• Field of Search: 379/98, 379/93, 379/94, 379/96, 379/97, 379/91, 379/91.02, 379/91.01, 379/93.08, 379/93.12, 379/93.13, 379/93.14, 379/93.15, 379/93.26, 379/93.28 , 379/93.29, 379/93.31, 379/93.32, 379/93.34, 375/222
• US Class Current: 379/93.29
• CPC Class Codes: H04L 12/4612 LAN interconnection over narrowband networks, e.g. N-ISDN, PSTN, X.25
• CPC Class Codes: H04M 11/06 Simultaneous speech and data transmission, e.g. telegraphic transmission over the same conductors
• CPC Class Codes: H04M 11/066 Telephone sets adapted for data transmision

Abstract

A method of processing incoming digital telephone calls from remotely located call originators which are destined for receipt by a host computer system. The host computer system is linked to the telephone network by a network access server. The call originators may be any type of data terminal, such as a personal computer or a credit card swipe, which is connected to a modem. The network access server extracts control signals imparted onto the telephone line and correlates the control signals with particular communications, routing or applications protocols identified with the call originators. The modem in the network access server which answers the call is configured during the call connect process and placed in a compatible format for the communications protocol of the incoming call. This dynamic custom configuration of the modem reduces the overall telephone call connection and processing time. The control signals may also be used by network access server for customized call routing or by the network access server or host computer system to run specialized application programs. The method is particularly suitable for use by large enterprises handling a high volume of incoming calls in which data is transmitted to the host computer system according to a variety of different communications protocols, or where the implementation of different routing paths or applications programs is desirable according to the identity or classification of the call originator.

Claims

1. In a communication processing system having a network access server and a memory storing a communication protocol parameter associated with control signals identified with incoming communications generated by remotely located call originators, said network access server comprising a communications access device interfacing between a computer network and an incoming line from a telephone network, a method for processing an incoming communication between a call originator and said computer network comprising the steps of:

(a) initiating a connection between said call originator and said network access server;

(b) extracting in said network access server one or more control signals from said incoming communication;

(c) correlating said control signals to said protocol parameter assigned to said control signals; and

(d) configuring said network access server according to said protocol parameter;

whereby said incoming communication is routed through said network access server to said network according to said protocol parameter, reducing the overall communication connection and processing time.

2. The method of claim 1, wherein said call originator is identified with a telephone number and wherein said control signals are identified with said telephone number of said call originator.

3. The method of claim 1, wherein said incoming communication is associated with a destination telephone number called by said call originator, and wherein said control signals are identified with said destination telephone number called by said call originator.

4. The method of claim 2 or claim 3, wherein said control signals further comprise control signals identified with a credit card transaction, and wherein the method further comprises the steps of:

decoding said control signals to digital data; and

passing said digital data to said network for processing in parallel with said configuring of said network access server.

5. The method of claim 1, wherein said incoming communication is transmitted by a digital telephone line and wherein said network access server comprises a telephone interface unit and a modem having a receiver and a transmitter, and wherein said step of initiating a connection between said call originator and said network access server comprises the steps of:

(1) detecting a trunk seizure;

(2) placing said modem in a call start mode;

(3) connecting said receiver of said modem to said digital telephone line;

(4) sending a response to said trunk seizure to said digital telephone line;

(5) detecting said control signals;

(6) confirming the receipt of said control signals;

(7) reconnecting said receiver of said modem to said digital telephone line;

(8) connecting said transmitter of said modem to said digital telephone line; and

(9) sending an answer signal to said digital telephone line, initiating transmission of said incoming communication.

6. The method of claim 1, wherein said network access server comprises a modem and wherein said control signals comprise multifrequency tones, and wherein the step of extracting said control signals comprises the steps of:

transmitting said multifrequency tones to said modem; and

decoding said multifrequency tones.

7. The method of claim 1, wherein said network access server further comprises a modem and a network application module interfacing between said network access server and said network, and wherein the step of correlating said control signals to said protocol parameter for said control signals comprises the steps of:

passing digital data representing said control signals from said modem to said network application module;

looking up in said memory said protocol parameter corresponding to said digital data;

passing said protocol parameter from said network application module to said modem.

8. The method of claim 7, wherein said network is connected to a host computer system, and wherein said network application module contains software that is accessible by said host computer system through said network permitting said host computer system to modify said protocol parameter in said memory.

9. The method of claim 1, wherein said network access server further comprises a modem and said network comprises an RS 232 port, and wherein a computer, housing said memory, is linked to said RS 232 port, and wherein the step of correlating said control signals to said protocol parameter assigned to said control signals comprises the steps of:

passing digital data representing said control signals from said modem to said computer;

looking up in said memory said protocol parameter corresponding to said digital data; and

passing said protocol parameter from said computer to said modem.

10. The method of claim 1 wherein said network access server further comprises a modem and wherein said memory is housed within said modem, and wherein said step of correlating said control signals to said protocol parameter assigned to said control signals comprises the step of looking up in said memory said protocol parameter corresponding to said control signals.

11. The method of claim 1, wherein said protocol parameter corresponds to a modulation scheme assigned to said control signals.

12. The method of claim 1, wherein said protocol parameter corresponds to a synchronization scheme assigned to said control signals.

13. The method of claim 1, wherein said protocol parameter corresponds to an error correction scheme assigned to said control signals.

14. The method of claim 1, wherein said protocol parameter corresponds to a data compression scheme assigned to said control signals.

15. The method of claim 1, wherein said protocol parameter corresponds to a protocol framing scheme assigned to said control signals.

16. The method of claim 1, wherein said incoming communication is routed from said call originator through a digital telephone line.

17. The method of claim 1, wherein said call originator comprises a credit card swipe terminal and a modem that transmits digital data according to a predetermined credit card swipe protocol,

wherein said control signals are identified with a telephone number called by said call originator, and wherein the step of configuring said network access server comprises the step of assigning said protocol parameter to said network access server, said protocol parameter being compatible with said credit card swipe protocol.

18. The method of claim 1, wherein said call originator comprises a lottery ticket dispensing device and a modem that transmits digital data according to a predetermined lottery ticket dispensing device protocol,

wherein said control signals are identified with a telephone number called by said call originator, and

wherein the step of configuring said network access server comprises the step of assigning said protocol parameter to said network access server, said protocol parameter being compatible with said lottery ticket dispensing device protocol.

19. The method of claim 1, wherein said call originator comprises a computer including a modem that transmits digital data according to a predetermined computer modem protocol,

wherein said control signals are identified with a telephone number called by said call originator, and

wherein the step of configuring said network access server comprises the step of assigning said protocol parameter to said network access server, said protocol parameter being compatible with said computer modem protocol.

20. The method of claim 1, wherein said network access server comprises a modem and the step of configuring said network access server comprises the step of executing in said modem preconfigured AT command strings implementing said protocol parameter.

21. The method of claim 1, wherein said network access server further comprises a modem, a network application module, and a network interface module interfacing between said network access server and said network, wherein the step of correlating said control signals to said protocol parameter comprises the steps of:

(1) passing digital data representing said control signals from said modem to said network application module;

(2) said network application module looking up in said memory said protocol parameter; and

(3) passing said protocol parameter from said network application module to said modem.

22. The method of claim 21 wherein said network application module contains software for modifying said memory that is accessible by a host computer system through said network, said software permitting said host computer system to change said protocol parameter stored in said memory.

24. The method of claim 1 or claim 23, wherein said network comprises a local area network.

23. In a communication processing system having a network access server and a memory storing a communication protocol parameter associated with incoming digital communications generated by remotely located call originators, said network access server comprising a communications access device interfacing between a computer network and an incoming line from a telephone network a method for processing an incoming communication between a call originators and said computer network linked to a host computer system comprising the steps of:

(a) initiating a connection between s aid call originator and said network access server;

(b) extracting in said network access server one or more control signals from said incoming communication;

(c) correlating said control signals to digital data assigned to said control signals;

(d) retrieving from said memory said protocol parameter assigned to said digital data;

(e) passing said digital data to said network for processing in parallel by said host computer system; and

(f) configuring said network access server according to said protocol parameters;

whereby said incoming communication is routed through said network access server to said host computer system according to said protocol parameter, reducing the overall communication connection and processing time.

25. The method of claim 23, wherein said network comprises an RS 232 port coupling said network access server to the host computer system.

26. A network access server for processing incoming communications between remotely located call originators and a computer network connected to a host computer system, said network access server interfacing between said computer network and an incoming line from a telephone network comprising:

a memory storing a communication protocol parameter associated with incoming digital communications generated by said remotely located call originators;

means for initiating a connection between said call originator and said network access server;

modem means for extracting one or more control signals from said incoming digital communications;

means for retrieving from said memory said protocol parameter for said control signals and for passing said protocol parameter to said modem means, said modem means configuring itself in response to said protocol parameter;

a network application module containing software capable of modifying said memory, said network application module being accessible by said host computer system through said network, permitting said host computer system to change said protocol parameter in said memory that is assignable to said control signals.

27. The network access server of claim 26, wherein said network comprises a local area network.

28. In a system comprising a credit card swipe connected to a modem, said modem linked to a network access server over a telephone line, said network access server comprising a communications access device interfacing between a credit card authorization system and said telephone line a method for processing a credit card transaction, comprising the steps of:

transmitting credit card transaction information to said modem;

said modem inputting said credit card transaction information into a telephone line destined for a predetermined telephone number, thereby initiating a call, said predetermined telephone number being previously selected depending upon the transmission protocol of said modem;

inputting predetermined control signals onto said telephone line carrying said credit card transaction information, said control signals corresponding to said telephone number;

receiving said call at said network access server, said network access server;

(i) extracting said control signals from said call;

(ii) correlating said control signals to predetermined protocol parameters assigned to said control signals;

(iii) configuring said network access server according to said predetermined protocol parameters; and

processing said credit card transaction;

whereby said modem and said network access server are placed in mutually compatible transmission and receiving modes, reducing the overall connection and processing time of said call.

30. The method of claim 28 or claim 29, wherein said system further comprises a host computer system in communication with said network access server, the method further comprises the steps of:

converting said control signals to digital data, and

passing said digital data to said host computer system;

said step of passing said digital data being performed simultaneously with the configuring of said network access server.

29. In a system comprising a credit card swipe connected to a modem, said modem linked to a network access server over a telephone line, said network access server comprising a communications access device interfacing between a credit card authorization system and said telephone line, a method for processing a credit card transaction, comprising the steps of:

transmitting credit card transaction information to said modem, said modem having a predetermined call origination telephone number;

said modem inputting said credit card transaction information into a telephone line, thereby initiating a call;

inputting predetermined control signals onto said telephone line carrying said credit card transaction information, said control signals corresponding to said predetermined telephone number and being previously selected depending upon the transmission protocol of said modem;

receiving said call at said network access server, said network access server;

(i) extracting said control signals from said call;

(ii) correlating said control signals to predetermined protocol parameters assigned to said control signals;

(iii) configuring said network access server according to said predetermined protocol parameters; and

processing said credit card transaction;

whereby said modem and said network access server are placed in mutually compatible transmission and receiving modes, reducing the overall connection and processing time of said call.

31. In a system comprising a lottery ticket dispensing device connected to a modem, said modem linked to a network access server over a telephone line;

said network access server comprising a communications access device interfacing between a lottery ticket authorization system and said telephone line, a method for processing a lottery transaction, comprising the steps of;

transmitting lottery transaction information to said modem;

said modem inputting said lottery transaction information into a telephone line destined for a predetermined telephone number, thereby initiating a call, said predetermined telephone number being previously selected depending upon the transmission protocol of said modem;

inputting predetermined control signals onto said telephone line carrying said lottery transaction information, said control signals corresponding to said telephone number;

receiving said call at said network access server, said network access server;

(i) extracting said control signals from said call;

(ii) correlating said control signals to predetermined protocol parameters assigned to said control signals;

(iii) configuring said network access server according to said predetermined protocol parameters; and

processing said lottery transaction;

whereby said modem and said network access server are placed in mutually compatible transmission and receiving modes, reducing the overall connection and processing time of said call.

32. In a system comprising a lottery ticket dispensing device connected to a modem, said modem linked to a network access server over a telephone line;

said network access server comprising a communications access device interfacing between a lottery ticket authorization system and said telephone line, a method for processing a lottery transaction, comprising the steps of;

transmitting lottery transaction information to said modem, said modem having a predetermined call origination telephone number;

said modem inputting said lottery transaction information into a telephone line, thereby initiating a call;

inputting predetermined control signals onto said telephone line carrying said lottery transaction information, said control signals corresponding to the said predetermined telephone information, said control signals corresponding to the said predetermined telephone number and being previously selected depending upon a transmission protocol of said modem;

receiving said call at a network access server, said network access server;

extracting said control signals form said call;

correlating said control signals to predetermined protocol parameters assigned to said control signals;

configuring said network access server according to said predetermined protocol parameters; and

processing said lottery transaction;

whereby said modem and said network access server are placed in mutually compatible transmission and receiving modes, reducing the overall connection and processing time of said call.

33. In a communication system processing incoming communications generated by remotely located call originators and having a network access server, said network access server having a modem capable of being paired to said call originator to enable high speed asymmetrical data communication therebetween, said network access server connected to an incoming line from a telephone network and having an interface to a computer network, said network access server further having a memory storing a communication protocol parameter associated with said high speed asymmetrical data communication,

a method performed in said network access server for processing said incoming communications between said call originators and said network access server comprising the steps of:

(a) initiating a connection between said call originator and said network access server;

(b) extracting a control signal from said incoming communication;

(c) converting said control signal to said protocol parameter assigned to said control signal;

(d) configuring said network access server according to said protocol parameter; and

(e) initiating said high speed asymmetrical data communication;

whereby the overall communication connection and processing time of said incoming communication is reduced.

34. In a system comprising a remotely located modem and a network access server, said network access server interfacing between an incoming line from a telephone network and a host computer system, a method for processing a transaction, comprising the steps of:

transmitting transaction information to said modem;

configuring said network access server in response to control signals received from said remote modem;

sending an inquire signal from said modem to said network access server;

passing said inquire signal from said network access server to said host computer system and simultaneously sending a first acknowledgment signal from said network access server to said modem as a result of said configuration;

said host computer sending a second acknowledgment signal to said network access server upon receipt of said inquire signal;

said network access server intercepting said second acknowledgment signal and discarding said second acknowledgment signal;

transmitting said transaction information from said modem to said network access server upon receipt of said first acknowledgment signal; and

transmitting said transaction information to said host computer system;

whereby the communication processing time of said transaction is reduced.

35. In a system comprising a remotely located modem and a network access sever, said network access server interfacing between an incoming line from a telephone network and a host computer system, a method for processing a communication comprising the steps of:

initiating a call from said modem to said network access server;

inputting predetermined control signals onto said incoming line carrying said communication;

extracting at said network access server said control signals from said call;

correlating said control signals to predetermined protocol parameters assigned to said control signals, and

spoofing said modem by sending a signal from said network access server to said modem causing said modem to initiate early transmission of said communication to said host computer system.

36. In a system comprising a remotely located modem and a network access server, said network access server interfacing between an incoming line from a telephone network and a host computer system, a method for processing a communication comprising the steps of:

initiating a call from said modem to said network access server;

inputting predetermined control signals onto said incoming line carrying said communication;

extracting at said network access server said control signals from said call;

correlating said control signals to predetermined protocol parameters assigned to said control signals, and

spoofing said modem, said step of spoofing comprising the steps of

(i) receiving a first signal from said modem at said network access server and passing said first signal to said host computer system;

(ii) responsively sending a second signal from said network access server to said modem, causing said modem to initiate transmission of said communication;

(iii) said host computer sending a third signal to said network access server in response to said first signal;

(iv) intercepting said third signal from said host computer system;

whereby the communication processing time of said communication is reduced.

38. The method of claim 36 or claim 37, wherein said communication comprises a credit card transaction.

39. The method of claim 36 or claim 37, wherein said first signal comprises an inquire signal and wherein said second signal comprises an acknowledge signal.

37. In a system comprising a remotely located modem and a network access server, said network access server interfacing between an incoming line from a telephone network and a host computer system, a method for processing a communication comprising the steps of:

initiating a call from said modem to said network access server;

spoofing said modem, said step of spoofing comprising the steps of

(i) receiving a first signal from said modem at said network access server and passing said first signal to said host computer system;

(ii) responsively sending a second signal from said network access server to said modem, causing said modem to initiate transmission of said communication;

(iii) said host computer sending a third signal to said network access server in response to said first signal;

(iv) intercepting said third signal from said host computer system;

whereby the communication processing time of said communication is reduced.

40. In a communication processing system having a network access server receiving incoming communications generated by remotely located call originators, said network access server comprising a communications access device interfacing between said computer network and an incoming line from a telephone network, a method for processing said incoming communications between said call originators and a computer network comprising the steps of:

(a) initiating a connection between said call originator and said network access server;

(b) extracting at said network access server one or more control signals from said incoming communication;

(c) correlating said control signals to digital data assigned to said control signals; and

(d) responsively initiating an application program for said incoming communication based on said digital data;

whereby said network access server dynamically initiates said application program based on said control signals associated with said remotely located call originator.

41. The method of claim 40, wherein said application program comprises a menu program for said call originator.

42. The method of claim 40, wherein said application program retrieves a profile of said call originator.

43. The method of claim 40, wherein said application program initiates commands to a host computer system on said computer network to facilitate the communication from said call originator.

44. The method of claim 40, wherein said call originator comprises a card swipe terminal and a modem.

45. The method of claim 40, wherein said step of configuring occurs in parallel with said step of initiating said application program.