Systems and methods for multiple mode voice and data communications using intelligently bridged TDM and packet buses

• US 6,389,009 B1
• Filed: 09/13/2001
• Issued: 05/14/2002
• Est. Priority Date: 12/28/2000
• Status: Expired due to Term

• Current Assignee: RPX Corporation
• Original Assignee: Vertical Networks Incorporated (Vertical Communications Incorporated)
• Inventors: Pickett, Scott K.
• Primary Examiner(s): VINCENT, DAVID ROBERT
• Application Number:
  US09/951,283
• Time in Patent Office: 243 Days
• Field of Search: 370/458, 370/400, 370/401-3, 370/469, 370/473, 370/445, 370/436, 370/474, 370/463, 370/395.1, 370/438, 370/419-421, 370/434, 370/440, 370/352-4, 370/532, 370/535, 370/537, 710/124, 710/117
• US Class Current: 370/352
• CPC Class Codes: H04L 12/2856 Access arrangements, e.g. Internet access asynchronous transfer mode networks H04L12/5601; broadband local area networks H04L12/2801; optical access or distribution networks H04Q11/0067; access to open networks H04L12/5691; digital subscriber line end-user equipment and bit-level processing of data on a PSTN-based network H04M11/00; home network gateways H04L12/2834; wireless access networks H04W
• CPC Class Codes: H04L 12/2874 Processing of data for distribution to the subscribers
• CPC Class Codes: H04L 12/2881 IP/Ethernet DSLAM
• CPC Class Codes: H04L 12/2896 Distributed processing, e.g. on line cards
• CPC Class Codes: H04L 12/43 with synchronous transmission, e.g. time division multiplex [TDM], slotted rings
• CPC Class Codes: H04L 12/6402 Hybrid switching fabrics
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 2012/6408 Shared Medium, e.g. memory, bus, ring
• CPC Class Codes: H04L 2012/6424 Access arrangements
• CPC Class Codes: H04L 2012/6459 Multiplexing, e.g. TDMA, CDMA
• CPC Class Codes: H04L 2012/6472 Internet
• CPC Class Codes: H04L 2012/6481 Speech, voice
• CPC Class Codes: H04L 61/00 Network arrangements, protocols or services for addressing or naming
• CPC Class Codes: H04L 65/1053 IP private branch exchange [PBX] functionality entities or arrangements circuit switched PBXs H04M3/00
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/80 Responding to QoS
• CPC Class Codes: H04L 67/00 Network arrangements or protocols for supporting network services or applications user-to-user messaging H04L51/00; network arrangements, protocols or services for supporting real-time applications in data packet communications networks H04L65/00
• CPC Class Codes: H04L 69/18 Multiprotocol handlers, e.g. single devices capable of handling multiple protocols
• CPC Class Codes: H04L 69/324 in the data link layer [OSI layer 2], e.g. HDLC
• CPC Class Codes: H04L 69/329 in the application layer [OSI layer 7]
• CPC Class Codes: H04L 9/40 : Network security protocols
• CPC Class Codes: H04M 3/2254 : in networks
• CPC Class Codes: H04M 3/42314 : in private branch exchanges
• CPC Class Codes: H04M 3/42323 : PBX's with CTI arrangements
• CPC Class Codes: H04M 3/51 : Centralised call answering arrangements requiring operator intervention , e.g. call or contact centers for telemarketing
• CPC Class Codes: H04M 3/533 : Voice mail systems
• CPC Class Codes: H04M 3/54 : Arrangements for diverting calls for one subscriber to another predetermined subscriber based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; to voice mail H04M3/53308
• CPC Class Codes: H04M 3/56 : Arrangements for connecting several subscribers to a common circuit, i.e. affording conference facilities video conference systems H04N7/15
• CPC Class Codes: H04M 7/006 : Networks other than PSTN/ISDN providing telephone service, e.g. Voice over Internet Protocol (VoIP) , including next generation networks with a packet-switched transport layer H04L65/00 takes precedence; aspects not specific to the type of network H04M3/00; special services in those networks H04M3/42
• CPC Class Codes: H04M 7/1295 : Details of dual tone multiple frequency signalling
• CPC Class Codes: H04Q 11/04 : for time-division multiplexing H04Q11/0001 takes precedence
• CPC Class Codes: H04Q 2213/13034 : A/D conversion, code compression/expansion
• CPC Class Codes: H04Q 2213/1322 : PBX
• CPC Class Codes: H04Q 2213/13377 : Recorded announcement
• CPC Class Codes: H04Q 2213/13389 : LAN, internet
• CPC Class Codes: H04Q 3/0045 : involving hybrid, i.e. a mixture of public and private, or multi-vendor systems
• CPC Class Codes: H04Q 3/72 : Finding out and indicating number of calling subscriber

Abstract

Systems and methods by which voice/data communications may occur in multiple modes/protocols are disclosed. In particular, systems and methods are provided for multiple native mode/protocol voice and data transmissions and receptions with a computing system having a multi-bus structure, including, for example, a TDM bus and a packet bus, and multi-protocol framing engines. Such systems preferably include subsystem functions such as PBX, voice mail and other telephony functions, LAN hub and data router. In preferred embodiments, a TDM bus and a packet bus are intelligently bridged and managed, thereby enabling such multiple mode/protocol voice and data transmissions to be intelligently managed and controlled with a single, integrated system. A computer or other processor includes a local area network controller, which provides routing and hub(s) for one or more packet networks. The computer also is coupled to a buffer/framer, which serves to frame/deframe data to/from the computer from TDM bus. The buffer/framer includes a plurality of framer/deframer engines, supporting, for example, ATM and HDLC framing/deframing. The buffer/framer is coupled to the TDM bus by way of a switch/multiplexer, which includes the capability to intelligently map data traffic between the buffer/framer and the TDM bus to various slots of the TDM frames. Preferably, a DSP pool is coupled to buffer/framer in a manner to provide various signal processing and telecommunications support, such as dial tone generation, DTMF detection and the like. The TDM bus is coupled to a various line/station cards, serving to interface the TDM bus with telephone, facsimiles and other telecommunication devices, and also with a various digital and/or analog WAN network services.

Claims

1. In a communication system coupled to a wide area communication network comprising a plurality of network resources, the communication system providing voice and data communications to a plurality of users in an office and having at least a first packet bus coupled to a plurality of packet-based devices, at least one time division multiplexed bus (TDM) coupled to a plurality of telephony devices and selectively coupled to the first packet bus and the wide area communication network, a processor and a switch/multiplexer coupled to the processor and the TDM bus, a method for providing voice and data communications comprising the steps of:

transferring packetized data to and from the system with one or more of the packet-based devices, wherein data are transmitted over the first packet bus in packets;

transmitting data over the TDM bus in frames, each of the frames having a plurality of slots for transmitting data, wherein the data transmitted over the TDM bus includes data for voice communications from one or more of the plurality of telephony devices;

protocol processing at least certain data transmitted over the first packet bus in packets and selectively providing the protocol-processed data to the TDM bus;

wherein the switch/multiplexer selectively controls the providing of data to and from particular slots of particular frames;

wherein the processor selectively controls voice communications from the one or more telephony devices over the TDM bus and packet-based communications over the first packet bus, wherein voice communications that stay in a circuit-switched form in the system occur over the TDM bus and the wide area communication network and wherein packet-based communications are protocol-processed and selectively coupled to the wide area communication network via the TDM bus.

2. The method of claim 1, wherein the system includes hardware and software selectively allocating resources win the system, wherein the processor determines a communication path from one or more communication paths in the system for each of the voice and packet-based communications in the office based on available network resources, type of communication, and/or usage patterns in the office.

3. The method of claim 1, wherein a LAN bus is coupled to the first packet bus and a second packet bus coupled to the LAN bus, wherein the processor controls communications between the first packet bus and the second packet bus over the LAN bus.

4. The method of claim 1, wherein the system includes hardware and software selectively allocating resources within the system, wherein the system determines one or more communications paths with the system and over the wide area communication network for processing voice and packet-based communications based on predetermined rules.

5. The method of claim 4, wherein the rules selectively allocate resources within the system as a function of time of day, resource availability over the wide area communication network, type of communication and/or usage patterns.

6. The method of claim 1, wherein the TDM bus comprises an MVIP bus.

7. The method of claim 1, wherein the first packet bus comprises an Ethernet bus.

8. The method of claim 1, wherein data communications occur via an HDLC protocol, wherein a framing/deframing circuit coupled to the switch/multiplexer frames and deframes the data communications to and from the HDLC protocol.

9. The method of claim 1, wherein data communications occur via an ATM protocol, wherein a framing/deframing circuit coupled to the switch/multiplexer frames and deframes the data communications to and from the ATM protocol.

10. The method of claim 1, wherein the plurality of telephony devices are coupled to the TDM bus via one or more interface circuits, wherein the plurality of telephony devices are coupled together through the TDM bus.

11. The method of claim 1, wherein the system controls voice communications between one of the telephony devices and the wide area communication network, wherein packet-based communications are concurrently occurring between the wide area communication network and the first packet bus.

12. The method of claim 1, wherein the system includes a resource allocation program operable by the processor, wherein the resource allocation program assigns resources within the system according to predetermined allocation rules.

13. The method of claim 12, wherein the predetermined allocation rules include rules for allocating voice communication inputs and rules for allocating data communication inputs.

14. The method of claim 12, wherein the predetermined allocation rules assign resources according to time of day.

15. The method of claim 12, wherein the predetermined allocation rules assign resources by prioritizing inputs received by the system.

16. The method of claim 1, wherein the system includes a plurality of TDM buses, wherein the switch/multiplexer maps data to predetermined slots of frames of the plurality of TDM buses.

17. The method of claim 16, wherein a framer/deframer is coupled to the switch/multiplexer, wherein the framer/deframer processes data in accordance with a first protocol and in accordance with a second protocol.

18. The method of claim 17, wherein a digital signal processor circuit is coupled to the framer/deframer and the TDM bus, wherein the digital signal processor circuit provides at least a dial tone or DTMF digit detection for at least certain of the plurality of telephony devices coupled to the TDM bus.

19. The method of claim 17, wherein data communications over the wide area communication network in accordance with the first protocol occur via the TDM bus, wherein data communications over the wide area communication network in accordance with the second protocol occur via the TDM bus.

20. The method of claim 17, wherein the first protocol comprises HDLC.

21. The method of claim 17, wherein the second protocol comprises ATM.

22. The method of claim 17, wherein the first and second protocols each comprise HDLC.

23. The method of claim 17, wherein one of the first or second protocols comprises a raw data protocol.

24. The method of claim 1, wherein the packet-based communications comprise voice-based packet communications.

25. The method of claim 24, wherein the packet-based communications comprise Voice over Internet Protocol (VoIP) packet-based communications.

26. The method of claim 25, wherein voice communications at stay in a circuit-switched form in the system occur over the TDM bus and the wide area communication network, and wherein VoIP packet-based communications are selectively coupled to the wide area communication network via the TDM bus.

27. The method of claim 26, wherein the system includes hardware and software resources that provide a VoIP gatekeeper function.

28. The method of claim 27, wherein the hardware and software resources determine if acceptable conditions exist on the Internet for VoIP packet-based communications.

29. The method of claim 1, wherein the at least one time division multiplexed (TDM) bus comprises a plurality of TDM buses.

30. The method of claim 29, wherein the switch/multiplexer maps data to predetermined slots of frames of the plurality of TDM buses, wherein a plurality of voice communications occur via the plurality of TDM buses.

31. The method of claim 30, wherein a framer/deframer is coupled to the switch/multiplexer, wherein the framer/deframer processes data in accordance with a first protocol and in accordance with a second protocol.

32. The method of claim 31, wherein a digital signal processor circuit is coupled to the framer/deframer and the TDM buses, wherein the digital signal processor circuit provides at least a dial tone or DTMF digit detection for at least certain of the plurality of telephony devices coupled to the TDM buses.

33. The method of claim 31, wherein data communications over the wide area communication network in accordance with the first protocol occur via the TDM buses, wherein data communications over the wide area communication network in accordance with the second protocol occur via the TDM buses.

34. The method of claim 31, wherein the first protocol comprises HDLC.

35. The method of claim 31, wherein the second protocol comprises ATM.

36. The method of claim 31, wherein the first and second protocols each comprise HDLC.

37. The method of claim 31, wherein one of the first or second protocols comprises a raw data protocol.

38. The method of claim 29, wherein the packet-based communications comprise voice-based packet communications.

39. The method of claim 38, wherein the packet-based communications comprise Voice over Internet Protocol (VoIP) packet-based communications.

40. The method of claim 39, wherein voice communications that stay in a circuit-switched form in the system occur over the TDM bases and the wide area communication network, and wherein VoIP packet-based communications are selectively coupled to the wide area communication network via the TDM buses.

41. The method of claim 29, wherein the systems includes hardware and software resources to selectively bridge between the TDM buses and a plurality of packet buses to provide voice and data communications to the plurality of users.