US20030193947A1 - System for controlling processing of data passing through network gateways between two disparate communications networks - Google Patents
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1033—Signalling gateways
- H04L65/104—Signalling gateways in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/2854—Wide area networks, e.g. public data networks
- H04L12/2856—Access arrangements, e.g. Internet access
- H04L12/2869—Operational details of access network equipments
- H04L12/287—Remote access server, e.g. BRAS
- H04L12/2876—Handling of subscriber policies
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/10—Architectures or entities
- H04L65/102—Gateways
- H04L65/1023—Media gateways
- H04L65/103—Media gateways in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/1066—Session management
- H04L65/1101—Session protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
- H04L65/60—Network streaming of media packets
- H04L65/75—Media network packet handling
- H04L65/765—Media network packet handling intermediate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/40—Network security protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/006—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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/12—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal
- H04M7/1205—Arrangements for interconnection between switching centres for working between exchanges having different types of switching equipment, e.g. power-driven and step by step or decimal and non-decimal where the types of switching equipement comprises PSTN/ISDN equipment and switching equipment of networks other than PSTN/ISDN, e.g. Internet Protocol networks
- H04M7/126—Interworking of session control protocols
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/02—Details
- H04L12/14—Charging, metering or billing arrangements for data wireline or wireless communications
- H04L12/1442—Charging, metering or billing arrangements for data wireline or wireless communications at network operator level
- H04L12/1446—Charging, metering or billing arrangements for data wireline or wireless communications at network operator level inter-operator billing
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M7/00—Arrangements for interconnection between switching centres
- H04M7/009—Arrangements for interconnection between switching centres in systems involving PBX or KTS networks
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- Business, Economics & Management (AREA)
- General Business, Economics & Management (AREA)
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- Data Exchanges In Wide-Area Networks (AREA)
Abstract
Description
- The present invention is in the field of telephony communications and network bridging services and pertains more particularly to methods and apparatus for controlling data-conversion capability and protocol-command compatibility for network-bridging services.
- The field of telephony now includes connection-oriented switched telephony (COST) systems, which are the well-known conventional intelligent networks provided by major telephone companies, as well as data network telephony (DNT), which are the computer-simulated telephone services provided typically in the Internet, by virtue of rather recent technology contributed to the art enabling transparent bridging between a COST telephony network and a Data-Packet-Network (DPN) like the Internet. With the advent of such technologies, ISPs have become more prevalent and much more competitive with one another. A typical ISP provides Internet connection services for clients operating Internet-capable appliances enabled to connect to the Internet over usually telephone lines. However, with many more ISPs competing for clients, value-added services (VAS) have been developed in accordance with available and emerging technologies. One of these services is a capability of bridging a COST network to an Internet Protocol (IP) network for bi-directional data and voice communication.
- In current art, ISPs use a typically standard set of system units or nodes to provide connectivity and telephony bridging services. One of these system nodes is termed a portmaster in the art, and another is commonly referred to as a Voice-over-Internet-Protocol (VoIP) Gateway. These nodes are more commonly referred to as network gateways or bridges. In typical implementation, one local telephone company (TELCO) carrier, which may be registered as an Incumbent-Local-Exchange-Carrier (ILEC), an Inter-Carrier-Exchange (ICX), or a Competing-Local-Exchange-Carrier (CLEC) operates switching apparatus, which may be a Public Access Branch Exchange (PABX), or another compatible switching apparatus. The PABX hosted by a local TELCO carrier is typically connected to the Portmaster nodes and the VoIP nodes of an ISP providing bridging services as described above. A plurality of PABX or other compatible switching apparatus are interconnected in the telephony network, but are hosted by separate TELCOs and are connected to separate ISP system-nodes.
- More recently, many ISPs have registered as CLECs for the purpose of being able to charge other TELCOs for connection termination services. Such ISPs use the acquired fees to subsidize other standard services. A well-known standard SS-7 protocol (defined in the ITU intelligent networks and Bell standards) is typically employed between connected switches of competing TELCOs. In standard practice, an originating TELCO charges a customer for call origination and call delivery. However, the delivery share of the customer's bill is regulated to go to a receiving TELCO or in this case an ISP registered as a CLEC. If an ISP registered as a CLEC provides VoIP services, it would have to pay termination fees, for example, to a receiving TELCO registered as an ILEC for calls delivered to the telephone network. The fees, charged back and forth by these entities work to elevate telephone-connection costs and ISP services to customers.
- What is clearly needed is a virtual switch-and-command system for providing data processing and routing instruction directly to network gateway nodes according to prevalent protocols, thus eliminating the need for a local TELCO switch. Such a method would enable cost savings related to the equipment costs, maintenance costs, and connection termination costs associated with a local switch. Cost savings realized may be passed on to customers creating a more competitive and attractive service provider.
- In a preferred embodiment of the present invention an Internet service provider (ISP) system registered as a Competing-Local-Exchange-Carrier (CLEC) is provided, comprising a channel bank for receiving calls from a connection oriented switched telephony (COST) network, and separating the calls into separate channels; at least one VoIP gateway connected to an Internet router and to one channel of the channel bank for converting voice call data between a COST protocol and Internet protocol; at least one portmaster (PM) node connected to the Internet router and to one channel of the channel bank for converting non-voice data between the COST protocol and the Internet protocol; and a computer station executing a virtual switch (VS) software, the computer station connected to the Internet router and to the channel bank. The system is characterized in that the computer station controls, via the VS software, the channel bank for separating the COST calls into the separate channels, and also receives and shares SS-7 commands and data with the VoIP gateway and the PM node via the Internet router connected to the PM node and the VoIP gateway, thereby avoiding use of a telephony switching apparatus for receiving and routing calls from the COST network.
- In another aspect of the invention a method for handling voice and non-voice data calls at an Internet Service Provider (ISP) site between a connection-oriented switched telephony (COST) network and the Internet, without handling the COST calls by a COST switch local to the ISP site is provided, the method comprising steps of (a) substituting a channel bank for the COST switching apparatus local to the ISP; (b) operating the channel bank by a computer station in the ISP site, the computer station executing a virtual switch software, to channel incoming COST calls to individual ones of Voice-Over-IP (VoIP) and Portmaster gateways connected to an Internet router; and (c) sharing SS-7 commands and data from the COST network with the VoIP and Portmaster gateways by the computer station through a link to the Internet router.
- The method and apparatus of the invention, taught in enabling detail below in several embodiments, for the first time provides a system for eliminating use of a local telephone switch for handling calls to individual gateways in an ISP.
- FIG. 1 is an architectural overview of a telephone exchange system and connected network-bridging service according to prior art.
- FIG. 2A is a block diagram illustrating components and function of a portmaster according to prior art.
- FIG. 2B is a block diagram illustrating components and function of a VoIP gateway according to prior art.
- FIG. 3 is an overview of a telephone-exchange system and connected network-bridging system practicing virtual switching according to an embodiment of the present invention.
- FIG. 4 is an overview of a telephone-exchange system and connected network-bridging system practicing virtual switching according to an alternative embodiment of the present invention.
- FIG. 1 is an overview of a
telephone exchange system 9 including a connected network-bridging service 15 according to prior art. Telephone-exchange network 9 comprises three separate entities. These are an ILEC 11, a CLEC 13, and anISP 15. The three described entities typically operate in atelephone network 10, represented herein by a dotted boundary labeled telephone network. A Public-Switched-Telephony-Network (PSTN) or a private telephone network may be represented bydomain 10. - An Internet Protocol (IP)
backbone 37 is illustrated logically outside ofdomain 10, and represents an Internet backbone or another suitable WideArea-Network (WAN) backbone, which supports IP. In thiscase backbone 37 is the well-known Internet backbone and its double arrows represent connection to other backbones and other portions of the Internet network as a whole. - As described in the background section,
ISP 15 provides gateway services for data and voice calls arriving fromnetwork 10 and enteringnetwork 37 or for data and voice calls arriving frombackbone 37 and enteringnetwork 10.ISP 15 has aVoIP gateway node 29 and aportmaster node 31 resident therein and adapted to provide the above described gateway services.VoIP gateway 29 is adapted to bridge voice calls (VoIP) andportmaster 31 is adapted to bridge data communication. - A
telephony switch 17 is illustrated within ILEC 11 and is adapted to perform telephony switching functions as are generally known in the art.Switch 17 is a PABX switch in this example. PABX 17 is hosted by a TELCO registered as an ILEC. Atelephony switch 19 is illustrated withinCLEC 13 and adapted to perform telephony switching functions as described with reference toswitch 17.Switch 19 may also be assumed to be a PABX switch in this example. PABX 19 is hosted by a TELCO registered as a CLEC, which is geographically local toISP 15. PABX 17 and PABX 19 are connected throughtelephone network 10 by atelephony trunk 21, which is adapted to carry voice calls and data communication. A dotted double-arrow illustrated between PABX 17 and PABX 19 represents logical SS-7 protocol capability between both switches as is known in the art. SS-7 signaling may be accomplished via a separate physical trunk or throughtrunk 21. In other applications, other standard protocols may be employed as are known in the art. - PABX19 is further adapted to divide
telephony trunk 21 on the ILEC side into a plurality of smaller trunks 25 a-25 n on the ISP side. In this example,trunk 25 a connects PABX 19 toPM 31 for data calls. Atrunk 25 n connects PABX 19 toVoIP gateway 29 for VoIP calls.PM 31 is adapted to convert data events arriving from PABX 19 over to IP data events for IP delivery overbackbone 37.VoIP gateway 29 is adapted to convert voice calls arriving from PABX 19 to VoIP calls for delivery overbackbone 37. SS-7 protocol provides the rules and routing instruction for the gateway conversion and delivery of all events entering the network represented bybackbone 37. Similarly, all IPevents entering domain 10 fromnetwork 37 are converted and routed according to SS-7 protocol. - In this prior art example, an
IP router 41, connected tobackbone 37, represents a first IP routing point in the Internet network for voice calls arriving thereto fromVoIP gateway 29 over adata trunk 35 n. Similarly, anIP router 39, connected tobackbone 37, represents a first routing point for all data events arriving thereto fromPM 31 over adata trunk 35 a. Trunks 35 a-n represent local data trunks. It is recognized that there may be more gateways strategically connected betweenPABX 19 andIP routers PM 31 and oneVoIP gateway 29 in this example for descriptive purpose in explanation of this simplified prior art configuration. - FIG. 2A is a block diagram illustrating components and functions of
PM 31 of FIG. 1.PM 31, as previously described, converts data communications and is a bi-directional gateway.Trunk 25 a (taken from FIG. 1) represents all data events arriving toPM 31 or coming fromPM 31 on the side ofdomain 10. Achannel bank 43 is provided withinPM 31 and functions to splittrunk 25 a into a plurality of channels or small groups of channels (one or more).Channel bank 43 is typically implemented as a software function for creating smaller channels or pipelines through which different types of data pass through for signal processing. - A Digital Signal Processing (DSP)
array 49 comprises, in this example, DSP units a-n, which number one per channel created bychannel bank 43. Each DSP unit a-n has an instance of DSP modem hardware and/or software illustrated herein asSW 57 executing thereon and adapted to terminate the analog modem leg for an assigned channel and to extract the pure data from each channel. A main controller 47 (hardware processor) is provided and is control-connected to bank 43 bycontrol line 45.Controller 47 is also control-connected to DSP units a-n as illustrated herein by a directional arrow beginning atcontroller 47 and leading toDSP array 49.Controller 47 is also illustrated as connected to adata port 51 by acontrol line 53.Controller 47 handles all port supervisory duties, signaling function, call identification, security, and a host of other functions, which are known in the art. An instance of software (SW) 55 is provided to execute oncontroller 47 and represents the control program for managing the function ofPM 31. - Data bound for IP transmission and processed by
array 49 arrives atdata port 51 over respective channels illustrated as solid lines connecting each of DSP units a-n toport 51. IP data fromport 51 is passed as IP data packets overdata trunk 35 a to IP router 39 (FIG. 1) and is ready to be routed over network 37 (FIG. 1). Data coming intoPM 31 fromnetwork 37 that is destined for domain 10 (FIG. 1) is processed in a reverse fashion accordingly. - FIG. 2B is a block diagram illustrating components and functions of
VoIP gateway 29 of FIG. 1.VoIP gateway 29 is quite similar toPM 31 as far as architecture and main description of function.Trunk 25 n represents bi-directional transmission of voice calls to, and voice calls fromVoIP gateway 29.VoIP gateway 29 comprises achannel bank 59, aDSP array 61, acontroller 65, adata port 67, and software (SW) instances 71 (DSP modem software), and 73 (control program). Control lines 63 (connectingcontroller 65 to channel bank 59), line 69 (connectingcontroller 65 to data port 67), and a directional arrow (illustrating control over DSP array 61) are also illustrated in the same fashion as in FIG. 2A. - A significant difference from
VoIP gateway 29 andPM module 31 is that DSP processing is performed more on the IP side of things. For example, an instance ofsoftware 73 provided as a control program forVoIP gateway 29 acts to manage conversion of analog voice over to compressed VoIP data packets for IP transmission according typically to H.323 standard of the ITU. It can be appreciated thatPM gateway 31 andVoIP gateway 29 are, other than the types of data they handle and software available for process control, very similar in architecture. - The inventor has illustrated and described the prior art above in order that one with skill in the art will appreciate the expense involved, as well as the complicated trunking and channeling required to provide adequate gateway services, which in actual practice, is more complex than the simple configuration described in FIG. 1.
- A main goal of the present invention is to allow an ISP or other service-providing entity to simulate by computer the mechanical switching and signal processing of prior art configurations. Such an enhanced configuration is described below.
- FIG. 3 is an overview of a telephone-
exchange system 27 with a connected network-bridgingsystem 15 practicing virtualized call switching according to an embodiment of the present invention.System 27 comprises many of the same components and architecture already described in FIG. 1. Therefore, only components which are new or modified by the present invention will be newly introduced and labeled with new element numbers herein. -
Telephone network 10 comprisesILEC cloud 11 andPABX 17 as was described in FIG. 1.Trunk 21 carries events destined for EP conversion andlogical trunk 23 carries the previously described SS-7 signaling. However, in this embodiment, PABX 19 (of FIG. 1) is eliminated and replaced with anun-intelligent channel bank 75.Channel bank 75 is adapted to receive both voice and data events fromPABX 17. However, the function ofbank 75 is limited to simply dividingtrunk 21 into a plurality of smaller local trunks represented herein by element number 77 a-n. In this example, 77 n represents a local trunk for voice calls and is connected toVoIP gateway 29, which is the VoIP gateway described in FIG. 1. 77 a represents a local trunk for data events and is connected toPM 31, which is the data gateway described in FIG. 1. - A personal computer (PC)81 is provided within the domain of
ISP 15 for the purpose of replacing the function ofPABX 19 of FIG. 1.PC 81 is connected to channelbank 75 by a bi-directional data andcontrol line 79.Line 79 carries the required SS-7 signaling fromPABX 17. The SS-7 signal is simply ported throughbank 75, overline 79 and intoPC 81.PC 81 has an instance of virtual switch (VS)software 85 resident therein.VS 85 is provided and adapted to receive SS-7 signaling as described above and rout it toVoIP gateway 29 and toPM 31 accordingly. This is accomplished by aseparate data connection 83, which connectsPC 81 toIP router 39 atbackbone 37. The proper SS-7 commands for handling arriving events are routed fromIP router 39 overrespective data trunks PM 31 andVoIP gateway 29 where they may be utilized in respective controllers 65 (FIG. 1) and 47 (FIG. 1) respectively. - By providing
PC 81 running VS 85, complete processing command and routing instruction control is provided, eliminating a need for a local PABX switch. In this embodiment,ISP 15 may itself be registered as a CLEC and may hostchannel bank 75 incloud 13, perhaps in corporation with the local TELCO. Costs recovered from the elimination ofPABX 19 may be passed on to customers subscribing toISP 15. Similarly, delivery fees fromILEC 11 may be shared between the TELCO formerly hostingPABX 19 andISP 15. - FIG. 4 is an overview of a telephone-
exchange system 33 and connected network-bridgingsystem 16 practicing virtual switching according to another embodiment of the present invention. In this embodiment it is assumed that anISP 16 functions as a fully registered CLEC independent from a local TELCO.Cloud 16 then comprises CLEC/ISP function and novel components.Telephone network 10 comprisesILEC 11 andPABX 17 as described in FIG. 1 and in FIG. 2. -
Trunk 23 carries events fromPABX 17 to a novel component described herein as a universal gateway (UIG) 87, which is hosted byISP 16.Logical trunk 23 provides SS-7 signal as previously described.UIG 87 is adapted to perform all of the function, including SS-7 signal processing, that was accomplished in the embodiment of FIG. 3 bychannel bank 75,PC 81,VoIP gateway 29, andPM 31. -
UIG 87 is a processor-controlled system having functionality that mirrors the capability ofDSP units 49 a-n and 61 a-n, which may be implemented as separated software functions instead of hardware units. DSP modem functionality represented bysoftware functionality 57 and 71 (from FIG. 2A and FIG. 2B) may be combined into one software instance. Process control capabilities, 47 and 65, which represent controller function, as described in FIGS. 2A and 2B, may be implemented on a same processor withinUIG 87.SW instances 55 and 73 (control programs) andVS software 85 are combined and integrated to provide all of the required instruction for data processing and routing according to SS-7 in this embodiment. In this example, it is assumed that the functions of data channeling as described in FIGS. 2A and 2B (43,59), as well as trunk channeling described in FIG. 3 (75) are incorporated intoUIG 87. -
UIG 87 represents a self-contained bi-directional gateway system capable of handling VoIP events as well as standard data events.UIG 87 is intended by the inventor to be a scaleable system such that it may be expanded or reduced in capacity depending on expected traffic load. Protocol for determining action states relating to VoIP related function or PM function may be executed in a multitasking and integrated environment utilizing known computer-processing techniques. - In still another embodiment,
PC 81 may retainVS capability 85 as described in FIG. 3 and may control SS-7 processing and routing within UIG. 87. In this case,PC 81 would obtain SS-7 signals fromIP router 39 overbi-directional data line 83 and communicate the appropriate commands toUIG 87 back overline 83,IP router 39, and trunks 35 a-n. In this respect,PC 81 would be a control station for controlling and maintainingUIG 87 and by virtue of the nature of it's connection, may be placed anywhere onIP backbone 37. - It will be apparent to one with skill in the art that the method and apparatus of the present invention may be practiced between any two types of communication networks wherein bridged data must be processed for entry into the next network without departing from the spirit and scope of the present invention. In a preferred embodiment, the networks represented are a COST network (10) and an IP network (37), which is the Internet. In alternative embodiments, other types of known communication networks may be bridged using the method and apparatus of the present invention with appropriate alterations to facilitate differing protocols inherent in the networks.
- The present invention, including method and apparatus, should be provided the broadest possible scope under examination as there are many possible architectural variations and unique applications. The spirit and scope of the present invention is limited only by the claims that follow.
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US10/456,040 US20030193947A1 (en) | 1999-03-12 | 2003-06-06 | System for controlling processing of data passing through network gateways between two disparate communications networks |
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US10/456,040 US20030193947A1 (en) | 1999-03-12 | 2003-06-06 | System for controlling processing of data passing through network gateways between two disparate communications networks |
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2003
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US11502963B2 (en) | 2019-01-11 | 2022-11-15 | Arista Networks, Inc. | System and a method for controlling timing of processing network data |
US11765095B2 (en) | 2019-01-11 | 2023-09-19 | Arista Networks, Inc. | System and a method for controlling timing of processing network data |
Also Published As
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WO2000054470A1 (en) | 2000-09-14 |
USRE42042E1 (en) | 2011-01-18 |
US6603762B1 (en) | 2003-08-05 |
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