41. Carnegie Mellon Data Communications data communications. People. Manager of data communications. Larry Gallagher lrg@andrew.cmu.edu Office CyH 278 Phone 412 2688579 http://www.net.cmu.edu/groups/datacomm/

Web Services NetReg NetMon VPN ... Projects Data Communications People Manager of Data Communications Larry Gallagher lrg@andrew.cmu.edu Office: CyH 278 Phone: 412 268-8579 Staff Mark Campasano campo@andrew.cmu.edu Office: CyH 277 Phone: 412 268-6433 Lisa Picone lp2n@andrew.cmu.edu Office: CyH 277 Phone: 412 268-8044 Joe Winwood jw0t@andrew.cmu.edu Office: CyH 277 Phone: 412 268-7968 Home Webmaster Carnegie Mellon Home

42. Cable Assemblies & Network Adapters, UTP, CAT5, Stranded, Solid, IBM, Fiber Opti Connectivity products and services for voice and data communications. http://www.tecdatawire.com/

Request a QUOTE Katrina Help Center Missing People Search Missing Pets Search Partners: Electrical / Industrial Connectors Computer Desks Cable assembly manufacturer Cable adapter manufacturer ... Request quote Welcome We are a high quality US manufacturer and reseller of custom and standard connectivity products for corporate end-users, OEMs and resellers. Our combination of design engineering support, guaranteed quality, on-time delivery, and competitive prices provides great value to all our customers. Our quotations are always very reasonable, and if you have a price target in mind, let us know and we'll see if we can help you meet that goal. We manufacture or resale a wide variety of cable assemblies, from the most basic to the very complex. Our pinout database contains millions of cable designs and manufacturer's cable part numbers. Among the types of cable assemblies We also offer our customers a wide diversity of connectivity accessories and cabling installation parts such as, Adapters, Connectors, Switch Boxes, Surge Protectors, Telephone Accessories, Patch Panels, Wall Plates....

43. DCC Web Site Information about the work of the RSGB data communications Committee. Contains bandplans and an online Notice of Variation application form. http://www.dcc.rsgb.org/

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44. A Brief History Of Data Communications In the 1960s, significant advances in data communications character coding This spawned the development of many modem and data communications companies! http://telecom.tbi.net/history1.html

Return to the Telecommunications page. Data Communications Milestones Presently, the United States is the most technologically advanced country in the area of telecommunications with about; 126 million phone lines, 7.5 million cellular phone users, 5 thousand AM radio broadcast stations, 5 thousand FM radio stations, 1 thousand television broadcast stations, 9 thousand cable television systems, 530 million radios, 193 million television sets, 24 ocean cables, and scores of satellite facilities! This is truly an "Information Age" and sometimes, you need to look at where we've been in order to see the future more clearly! What hath God Wrought? These famous words were telegraphed by Samuel F. B. Morse in 1844, although the patent for the "electric telegraph" was submitted in 1837 by Charles Wheatstone. By the time of the Civil War, telegraph communications spanned the United States, and in 1866, the first trans-Atlantic cable was laid between the US and France (Werner von Siemens from Germany was one of the pioneers in the development of reliable submarine cables). The basic elements of Morse code were the dot ("dit") and the dash ("dah"). In International Morse code (the most prevalent of the Morse code variants), the dot was the minimal duration element, with the dash equal to three times the duration of the dot. Electrically, current flows with both dots and dashes. The time between each element of the same character was one dot. The amount of time between each character was three dots; and the time between words was equal to seven dots! During these "idle" time intervals, the telegraph line was open (no current flow).

45. Comtrol® - Device Networking, Device Servers, Multiport Cards Products to enable data communications for remote LAN and Internet access for process control and management. http://www.comtrol.com

HOME ABOUT COMTROL PRODUCTS BUY NOW ... Hospitality Applications Welcome, Visitor! You are currently not logged in. Serial Shootout Latency Benchmark Multiport Serial Cards Multimodem Cards USB-connected Serial Hubs ... Application Servers Check out our Hardware Finder Serial Device Networking "Anytime, anywhere access" to serial devices Privacy Terms/Conditions Contact Us Site Index Send any comments or questions regarding this Web site to the webmaster 6655 Wedgwood Road Minneapolis, Minnesota 55311-3646 It appears that you have javascript disabled in your browser or your browser does not support Javascript. You may experience difficulties while browsing this site. This website uses Javascript (and cascading stylesheets) to display dropdown menus, rollover images, and on-line form validation. Please view this site with a browser that supports Javascript and turn Javascript "ON" in your browsers' preferences. Instructions on doing this on the more popular browsers is provided here . Or choose a browser that supports javascript . A site map has been provided here . Thank you.

46. Data Communications Engineering Course Syllabus - Updated March 2000 Definition of a Communications Network Operation at the data link layer; Operation of a bridge; Packet forwarding; Internal queuing of packets. http://www.erg.abdn.ac.uk/users/gorry/course/syllabus.html

WWW Course Syllabus This information is provided in advance of the course to allow students to see the topics which will be covered. The information here provides a detailed description of the subjects which the course covers, and the subjects which the student is expected to understand after studying on the course. Most of this material will be presented in the form of lectures, but students are expected to spend time in private study, attending tutorials, attempting tutorial "exam" questions, and in using the additional material made available via these web pages. A road-map to the course provides an easy way to access the on-line information about general topics. The course will cover the following terms and concepts: Open Systems Interconnection Reference Model Definition of a Communications Network Concept of a node; Nodes connected by links to form networks; Names & Addresses; the idea of "address resolution" Types of Network Understanding of operation and examples of use. Point-to-point Connections Fixed configuration; dedicated capacity

47. Pulse Web Site Home Page For Data Communications And Wide Area Networking Produc The Pulse corporate home page, entry point to information about Pulse products and services for data communications and Wide Area Networking. http://www.pulsewan.com/

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48. Data Cable Co. Inc. Specializing in the manufacture of data communications Cables, Special Assemblies and Cable Harnesses. http://datacable.ca/

Manufacturer of Cable Assemblies since 1980 Phone: Fax: Email: dcable@datacable.ca We believe you as a customer, deserve the highest product quality and service possible.

49. RAD - TDMoIP RAD data communications and CableMatrix Team Up To Show T1 over DOCSIS with Guaranteed Yaakov Stein of RAD data communications and Brian Stroehlein of http://www.tdmoip.com/

50. Data Communications data communications 45 - Static table for data communications - Application notes available in branch data communications http://www.semiconductors.philips.com/cgi-bin/catalog/catalog.pl/282/40099/

_page.writeBreadCrumb("1") Semiconductors languages English Japanese Simplified Chinese Traditional Chinese _page.writeLeftNav("1") Product Information Analog and mixed-signal devices printGuideIcon(' - ') Audio printGuideIcon(' - ') Bus devices printGuideIcon(' - ') printGuideIcon(' - ') Data communications printGuideIcon(' - ') Amplifiers printGuideIcon(' - ') Drivers printGuideIcon(' - ') Modem printGuideIcon(' - ') Serial data controllers (UART/USART) printGuideIcon(' - ') Discretes printGuideIcon(' - ') Display drivers printGuideIcon(' - ') printGuideIcon(' - ') Logic printGuideIcon(' - ') Microcontrollers printGuideIcon(' - ') Peripherals printGuideIcon(' - ') printGuideIcon(' - ') Video printGuideIcon(' - ') Wired communication printGuideIcon(' - ') Wireless communication printGuideIcon(' - ')

51. Simple Infrared Data Communications Build your own infrared transmitter and receiver for data communications between microcontrollers. http://www.rentron.com/Infrared_Communication.htm

Using The PIC Microcontroller Hardware PWM Feature HERE for details. Parts Kits now in stock for this application HERE M any applications can benefit from an infrared communications link. This article will hopefully Note: Now - let's dive right in to the code. PicBasic Pro Code: ' Setting up hardware PWM for 38KHz operation. DEFINE LOADER_USED 1'Setup for boot-loader programming TRISC.2 = ' CCP1 (PortC.2 = Output) PR2 = 25 ' Set PWM Period for approximately 38KHz CCPR1L = 13 ' Set PWM Duty-Cycle to 50% CCP1CON = %00001100 ' Select PWM Mode T2CON = %00000100 ' Timer2 = ON + 1:1 prescale TRISB.0 = ADDRESS VAR BYTE DAT VAR BYTE ID VAR BYTE ADDRESS = 10 ID = 25 BEGIN: FOR DAT = TO 255 SEROUT PORTB.0,4,[ID,ADDRESS,DAT] PAUSE 100 NEXT GOTO BEGIN T he hardware PWM is configured in the beginning of our code. After we define the PWM frequency, and duty cycle, our code can proceed to performing other tasks while the hardware continues to operate in the background. Notice how program execution falls into a tight loop once it reaches the routine BEGIN. Even though we stay within this loop sending serial data continuously, the PWM signal continues without the need for software intervention to generate the 38KHz carrier. Hardware peripherals offer true multi-tasking not available otherwise. Yes - you'll hear some people boasting of using interrupts or "C" for multi-tasking, but it's still a far cry far from the real thing. Background hardware operation is the "real deal" period.

52. HALO Electronics - Magnetic Components, Transformers, Isolation Modules Manufacturer of filters and transformer modules for networking and data communications applications. http://www.haloelectronics.com

@import "halo.css"; HALO Electronics, Inc. manufactures the highest quality communication magnetics including signal transformers, filters, CMR chokes and low power DC/DC converters. HALO is a technology leader in many areas offering leading edge solutions that provide real estate and cost savings. HALO offers a complete line of Local Area Networking (LAN) products including Ethernet, Fast Ethernet, Gigabit Ethernet, Token Ring, ATM and Fiber Channel over copper. HALO also offers a broad range of WAN products for T1/E1/PRI ISDN, T3/E3/DS3, DSL, as well as 56 and 64Kbps for DDS, DSU and OCU applications. We appreciate the opportunity to serve you. Press Releases Highest Density Ethernet Transformer Solutions 6 Port 10/100 Transformer Solution GR1089 FastJacks Ethernet Lightning Protection RJ45 Ports with Integrated Magnetics New Hi-Denisty SIP Telepro VoIP 10/100 Isolation Modules Dual Port T1/E1 SMD Module Home - Company Press Releases Products Local Contacts ... Contact Us HALO Electronics, Inc. 1861 Landings Drive, Mountain View, CA 94043 E-mail: info@haloelectronics.com

53. The Linux Review | Resources For Linux Users were very few books that explored data communications for network computing. The books that I read on data communications only gave a partial view of http://www.linuxports.com/howto/intro_to_networking/

Provided by Command Prompt, Inc., purveyors of fine Linux/PostgreSQL services and support. Resources for Linux Users home about contact [guest@thelinuxreview /lxp September 16th, 2005 register? To contribute please login (or register Username: Password: Lose your password? Consultants Add Consultant Edit Consultant Find Consultant Consultant Guide Quick Search Enter Mail Code (at least 2 digits) Documentation Sgml with Emacs Introduction to Networking IP Masquerade HOWTO ... Web HOWTO Humor TUX: Term Unit X Dictionary.Com Word of the Day - hauteur: Dictionary.com Word of the Day Read More... Linux Today - Editor's Note: The Bigger They Are... Read More... - internetnews.com: The Great 'Race to Linux' Read More... - PC Pro: SCO and Novell Dispute Takes New Twist Read More... Tech Stocks News - Net Stocks: Google little changed amid AOL-Microsoft rumors Read More... - Silicon Stocks: Intel, Adobe lead tech stocks to higher close Read More... - Intel, Adobe lead tech stocks to higher close Read More... SlashDot Topics suggest a topic?

54. CNW Communications Provide independent bandwidth services and advice to business customers. Services include voice and data communications and special rate telephone number services to clients throughout the UK. http://www.cnwcommunications.com

HOME ABOUT US SERVICES CONTACT US ... BILLING [ HOME ] [ ABOUT US ] CPS VOICE INTERNET MOBILE "CNW is a leading UK provider of Business Communication Solutions, ...enabling our customers to select, deploy and manage the best communication services that underpin the achievement of business objectives whilst reducing costs at the same time." The most comprehensive and advanced range of ADSL and SDSL business broadband services in the UK today. Services available range from 500k ADSL at 50:1 contention through to 4mb SDSL at 1:1 contention. tell me more... is a remote email solution, developed for business users who need to stay online on the move... Existing solutions have required users to dial into their company network, which is both time consuming, inconsistent and raises issues of security. BlackBerry solves these problems providing access to your email, calendar and contacts wherever and whenever you want.

55. Firewall Appliances, Legacy Protocol Converters, Connectivity Solutions, Network legacy gateways, network switches, communication controllers, servers, custom connectivity solutions. Lucidata data communications Consultants http://www.lucidata.com/

Lucidata Data Communications Consultants Lucidata is a consultancy specialising in providing products and services to all business sectors worldwide. Our expertise in providing interconnectivity within legacy systems is demonstrated with our broad range of off-the-shelf products while our custom research, development and test facilities near Cambridge UK allow us to undertake rapid custom prototype development for clients. We pride ourselves on being able to produce complete functioning prototypes, metalwork, electronics and software in the minimum of time. High speed does not mean low quality as all our development processes are managed under the control of our ISO9001/2000 compliant Quality Management System. If you have a seemingly impossible connectivity problem or simply do not have the resources available to undertake a needed hardware or software development just contact us. Lucidata's involvement with IT Security over many years has enabled it to design custom hardware solutions for its clients. This particular expertise has been embodied in the design of our Lucigate Firewall.

56. Summary Report 151081.00 - Network Systems and data communications Analysts Research and recommend network and data communications hardware and software. http://online.onetcenter.org/link/summary/15-1081.00

Related Links OnLine Help Home Occupation Quick Search: Updated 2004 Summary Report for: 15-1081.00 - Network Systems and Data Communications Analysts Analyze, design, test, and evaluate network systems, such as local area networks (LAN), wide area networks (WAN), Internet, intranet, and other data communications systems. Perform network modeling, analysis, and planning. Research and recommend network and data communications hardware and software. Includes telecommunications specialists who deal with the interfacing of computer and communications equipment. May supervise computer programmers. Sample of reported job titles: Network Engineer, Systems Engineer, Systems Administrator, Telecommunications Manager, System Programmer, Systems Specialist, Network Technician, Telecommunications Engineer, Networking Systems And Distributed Systems Engineer, Network Manager View report: Summary Details Custom Tasks Knowledge ... Additional Information Tasks Maintain needed files by adding and deleting files on the network server and backing up files to guarantee their safety in the event of problems with the network. Monitor system performance and provide security measures, troubleshooting and maintenance as needed.

57. Programming:Serial Data Communications - Wikibooks Serial data communications is the foundation for most forms of data communications used with modern computing devices. The focus of these articles will be http://en.wikibooks.org/wiki/Programming:Serial_Data_Communications

Programming:Serial Data Communications From Wikibooks All bookshelves Science bookshelf Computer Science bookshelf Serial communications bookshelf Serial data communications is the foundation for most forms of data communications used with modern computing devices. The focus of these articles will be around the implementation of RS-232 (aka RS-232C, aka V.24) based serial data communication and will explore a wide range of implementations and uses for serial data transfer. Contents Contents Intended Audience Prerequisites External Links to Resources ... edit Contents Wikibook Development Stages Sparse text Developing text Maturing text Developed text Comprehensive text: Introduction and OSI Network Model RS-232 Wiring and Connections Programming the 8250 UART MAX232 Driver/Receiver Family ... edit Intended Audience This series of articles is intended for people who are interested in diving into the "guts" of serial data communications systems. This material is rarely taught in university courses, and it can be tough to learn "on the job". As with any software development, the individual topics are simple, but tying them all together can very complex. This text takes a layered approach to the subject, in order to avoid overwhelming the novice. The first chapter deals with the bare copper wires and how they are handled. Subsequent chapters will add layers of protocol.

58. IEC: OFDM For Mobile Data Communications 1 Characteristics and Evolution of data communications for a Mobile Environment 2 Overview of the Wireless Environment 3 Overview of Traditional Mobile http://www.iec.org/online/tutorials/ofdm/

About Us IEC Homepage Press Releases History ... Principal Sponsors BROWSE All New Tutorials Broadband Access Business and Strategy Issues ... Switching, Signaling, and Network Intelligence PROGRAMS iForums Web ProForums Virtual Exhibits Product Profiles ... Communications Technologies Program SEARCH Site Map MEMBER AREA Our members enjoy exclusive access to selected white papers and multimedia iForums. Consider these and other benefits of our FREE registration , or register by clicking here Already a member? Please click here to log in Principal Sponsors: OFDM for Mobile Data Communications Definition and Overview Definition of OFDM Orthogonal frequency division multiplexing (OFDM) is a communications technique that divides a communications channel into a number of equally spaced frequency bands. A subcarrier carrying a portion of the user information is transmitted in each band. Each subcarrier is orthogonal (independent of each other) with every other subcarrier, differentiating OFDM from the commonly used frequency division multiplexing (FDM). Overview OFDM, or multitone modulation as it is sometimes called, is presently used in a number of commercial wired and wireless applications. On the wired side, it is used for a variant of digital subscriber line (DSL). For wireless, OFDM is the basis for several television and radio broadcast applications, including the European digital broadcast television standard, as well as digital radio in North America. OFDM is also used in several fixed wireless systems and wireless local-area network (LAN) products. A system based on OFDM has been developed to deliver mobile broadband data service at data rates comparable to those of wired services, such as DSL and cable modems.

59. GPS Vehicle Fleet Tracking:Products And Solutions Provided By Allied Communicati Consults businesses and consumers about wireless voice and data communications products throughout the US. http://www.alliedgps.com

Vehicle Tracking Solutions Provider Home Product Info Discrete Wireless About Us Contact Us ... Site Map Why GPS Fleet Tracking works for your company? GPS Vehicle Tracking Made Simple, Affordable, and Efficient. MARCUS® is a real time vehicle tracking system that uses GPS (Global Positioning System) technology to provide detailed information on vehicle activity. This system was created specifically for service and delivery companies needing an efficient, cost effective method to manage their fleets. The MARCUS system converts GPS data into user-friendly maps and reports, accessible via the internet. No software is required, simply login using any PC with Internet Explorer and instantly access your data. Compared to other vehicle tracking methods, the MARCUS system provides the most user-friendly information in the fastest, most cost-effective method available. MARCUS® provides a wide array of reports based upon GPS coordinates sorted by street and customer defined location names. GPS vehicle tracking with MARCUS is a valuable tool for field managers who take advantage of the MARCUS real-time alerts. Additionally, Fleet managers utilize the MARCUS Fleet Management system reports to validate billable hours via the start stop report. The MARCUS system also provides additional reports like Detailed Activity, Begin/End Day, Speeding, Fleet Status, Fleet Summary, Miles Driven by State, Location, Alert and Sensor summaries. Do you as a manager/owner seek to?

60. University Of Warwick: Computer Science: Undergraduate: Modules CS222 data communications and Networks. CS222 12 CATS (6 ECTS) Term 1 Forouzan B, data communications and Networking (2nd ed), McGrawHill. http://www.dcs.warwick.ac.uk/undergraduate/modules/cs222.html

Accessibility Contact Us A-Z Index Home ... Local Local Navigation Undergraduate Computer Science Computer and Business Studies Computer Systems Engineering ... Accreditation Modules Study Skills Visiting Students Course Transfers Privacy CS222 Data Communications and Networks CS222 12 CATS (6 ECTS) Term 1 Availability Option - CS, CMS and CBS Prerequisites CS131 Mathematics for Computer Scientists II, ES107 Mathematics for Engineers, or similar Mathematics module Academic Aims The aim of the module is to acquaint students with the principles and current practice of data communication networks and to develop in them an analytical approach to problems in network design and operation. The module is grounded in elements of communication theory sufficient to give students an understanding of the fundamental problems in communication, which affect its reliability and efficiency. Learning Outcomes Students completing the module successfully should be able to demonstrate: An understanding of the structure of the communication process. Knowledge of the main control issues in communication networks.

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