RJ11 Jack Product Presentation
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The Twisted-Pair Telephone Transmission Line
High Frequency Design From November 2002 High Frequency Electronics Copyright © 2002, Summit Technical Media, LLC TRANSMISSION LINES The Twisted-Pair Telephone Transmission Line By Richard LAO Sumida America Technologies elephone line is a This article reviews the prin- balanced twisted- ciples of operation and Tpair transmission measurement methods for line, and like any electro- twisted pair (balanced) magnetic transmission transmission lines common- line, its characteristic ly used for xDSL and ether- impedance Z0 can be cal- net computer networking culated from manufactur- ers’ data and measured on an instrument such as the Agilent 4395A (formerly Hewlett-Packard HP4395A) net- Figure 1. Lumped element model of a trans- work analyzer. For lowest bit-error-rate mission line. (BER), central office and customer premise equipment should have analog front-end cir- cuitry that matches the telephone line • Category 3: BWMAX <16 MHz. Intended for impedance. This article contains a brief math- older networks and telephone systems in ematical derivation and and a computer pro- which performance over frequency is not gram to generate a graph of characteristic especially important. Used for voice, digital impedance as a function of frequency. voice, older ethernet 10Base-T and commer- Twisted-pair line for telephone and LAN cial customer premise wiring. The market applications is typically fashioned from #24 currently favors CAT5 installations instead. AWG or #26 AWG stranded copper wire and • Category 4: BWMAX <20 MHz. Not much will be in one of several “categories.” The used. Similar to CAT5 with only one-fifth Electronic Industries Association (EIA) and the bandwidth. the Telecommunications Industry Association • Category 5: BWMAX <100 MHz. -
Digital Subscriber Line (DSL) Technologies
CHAPTER21 Chapter Goals • Identify and discuss different types of digital subscriber line (DSL) technologies. • Discuss the benefits of using xDSL technologies. • Explain how ASDL works. • Explain the basic concepts of signaling and modulation. • Discuss additional DSL technologies (SDSL, HDSL, HDSL-2, G.SHDSL, IDSL, and VDSL). Digital Subscriber Line Introduction Digital Subscriber Line (DSL) technology is a modem technology that uses existing twisted-pair telephone lines to transport high-bandwidth data, such as multimedia and video, to service subscribers. The term xDSL covers a number of similar yet competing forms of DSL technologies, including ADSL, SDSL, HDSL, HDSL-2, G.SHDL, IDSL, and VDSL. xDSL is drawing significant attention from implementers and service providers because it promises to deliver high-bandwidth data rates to dispersed locations with relatively small changes to the existing telco infrastructure. xDSL services are dedicated, point-to-point, public network access over twisted-pair copper wire on the local loop (last mile) between a network service provider’s (NSP) central office and the customer site, or on local loops created either intrabuilding or intracampus. Currently, most DSL deployments are ADSL, mainly delivered to residential customers. This chapter focus mainly on defining ADSL. Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Line (ADSL) technology is asymmetric. It allows more bandwidth downstream—from an NSP’s central office to the customer site—than upstream from the subscriber to the central office. This asymmetry, combined with always-on access (which eliminates call setup), makes ADSL ideal for Internet/intranet surfing, video-on-demand, and remote LAN access. Users of these applications typically download much more information than they send. -
Book IG 1800 British Telecom Rev A.Book
Notice to Users ©2003 2Wire, Inc. All rights reserved. This manual in whole or in part, may not be reproduced, translated, or reduced to any machine-readable form without prior written approval. 2WIRE PROVIDES NO WARRANTY WITH REGARD TO THIS MANUAL, THE SOFTWARE, OR OTHER INFORMATION CONTAINED HEREIN AND HEREBY EXPRESSLY DISCLAIMS ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE WITH REGARD TO THIS MANUAL, THE SOFTWARE, OR SUCH OTHER INFORMATION, IN NO EVENT SHALL 2WIRE, INC. BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES, WHETHER BASED ON TORT, CONTRACT, OR OTHERWISE, ARISING OUT OF OR IN CONNECTION WITH THIS MANUAL, THE SOFTWARE, OR OTHER INFORMATION CONTAINED HEREIN OR THE USE THEREOF. 2Wire, Inc. reserves the right to make any modification to this manual or the information contained herein at any time without notice. The software described herein is governed by the terms of a separate user license agreement. Updates and additions to software may require an additional charge. Subscriptions to online service providers may require a fee and credit card information. Financial services may require prior arrangements with participating financial institutions. © British Telecommunications Plc 2002. BTopenworld and the BTopenworld orb are registered trademarks of British Telecommunications plc. British Telecommunications Plc registered office is at 81 Newgate Street, London EC1A 7AJ, registered in England No. 180000. ___________________________________________________________________________________________________________________________ Owner’s Record The serial number is located on the bottom of your Intelligent Gateway. Record the serial number in the space provided here and refer to it when you call Customer Care. Serial Number:__________________________ Safety Information • Use of an alternative power supply may damage the Intelligent Gateway, and will invalidate the approval that accompanies the Intelligent Gateway. -
Introduction to Digital Subscriber's Line (DSL) Chapter 2 Telephone
Introduction to Digital Subscriber’s Line (DSL) Professor Fu Li, Ph.D., P.E. © Chapter 2 Telephone Infrastructure · Telephone line dates back to Bell in 1875 · Digital Transmission technology using complex algorithm based on DSP and VLSI to compensate impairments common to phone lines. · Phone line carries the single voice signal with 3.4 KHz bandwidth, DSL conveys 100 Compressed voice signals or a video signals. 1 · 15% phones require upgrade activities. · Phone company spent approximately 1 trillion US dollars to construct lines; · 700 millions are in service in 1997, 900 millions by 2001. · Most lines will support 1 Mb/s for DSL and many will support well above 1Mb/s data rate. Typical Voice Network 2 THE ACCESS NETWORK • DSL is really an access technology, and the associated DSL equipment is deployed in the local access network. • The access network consists of the local loops and associated equipment that connects the service user location to the central office. • This network typically consists of cable bundles carrying thousands of twisted-wire pairs to feeder distribution interfaces (FDIs). Two primary ways traditionally to deal with long loops: • 1.Use loading coils to modify the electrical characteristics of the local loop, allowing better quality voice-frequency transmission over extended distances (typically greater than 18,000 feet). • Loading coils are not compatible with the higher frequency attributes of DSL transmissions and they must be removed before DSL-based services can be provisioned. 3 Two primary ways traditionally to deal with long loops • 2. Set up remote terminals where the signals could be terminated at an intermediate point, aggregated and backhauled to the central office. -
Ethernet/Category 5 Network Cabling Guide Prepared by SJ Wilkinson (August 2002) Based on Steve Derose’S Guide to CAT5 Network Wiring (See Later Web Reference)
Ethernet/Category 5 Network Cabling Guide Prepared by SJ Wilkinson (August 2002) Based on Steve DeRose’s Guide to CAT5 Network Wiring (See later Web Reference) Networks A Local Area Network (LAN) can be as simple as two computers, each having a network interface card (NIC) or network adapter and running network software, connected together with a crossover cable. Here the crossover cable would have a plug at either end to connect into the NIC socket at the back of each computer. The next step up would be a network consisting of three or more computers and a hub. Each of the computers is plugged into the hub with a straight-thru cable (the crossover function is performed by the hub). For a small network the straight-thru cables would have plugs at either end – one to connect to the computer and one to the hub. For larger networks wall cabling, wall sockets and patch cables are used. A CAT5 "patch panel" is used at the hub end where all your wires come together and provides a group of sockets for further cables. Straight-thru patch cables connect computers to sockets (jacks). Straight-thru wall cables connect sockets to the patch panel. Straight-thru patch cables connect the patch panel to the hub. Patch panels often make network cabling neater but are not essential as (a) wiring a plug is no harder than wiring a panel; (b) you still need cables to go from the panel to the hub; and (c) it adds extra connections, so lowers reliability. 1 Planning your Network Pick a location for your hub, preferably centred to keep cable runs shorter. -
IEEE Paper Template in A4
Volume 6, Issue 2, February 2016 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com A Review Paper on Cable Connectors Jhankar Tyagi Guest Faculty, Shaheed Sukhdev College of Business Studies, Delhi University, Delhi, India Abstract— This paper is an attempt to give a basic knowledge of cable connectors to the user. Keywords— Cable glands, RJ 45 Connector, Banana Connector, BNC Connector, XLR Connector I. INTRODUCTION An electrical connector is an electro-mechanical device for joining electrical circuits as an interface using a mechanical assembly. Connectors consist of plugs (male-ended) and jacks (female-ended). In computing, an electrical connector can also be known as a physical interface. II. PROPERTIES OF CONNECTORS Electrical connectors are characterized by their pin out and physical construction, ruggedness and resistance to vibration, resistance to entry of water or other contaminants, resistance to pressure, lifetime .They may be keyed to prevent insertion in the wrong orientation. It is usually desirable for a connector to be easy to identify visually, rapid to assemble, and be inexpensive .No single connector has all the ideal properties. Cable Glands: Cable glands known as cable connectors, connect wires to devices mechanically rather than electrically and are distinct from quick-disconnects .They are mechanical cable entry devices and can be constructed from metallic or non-metallic materials. They are used in conjunction with cable and wiring used in electrical instrumentation and automation systems. They are used as a ceiling and a termination device to insure that the characteristic of the enclosure which the cable enters can be contained adequately. -
CALRAD 70 Series - Telephone Accessories
CALRAD 70 series - telephone accessories CALRAD’S NEW TELEPHONE HEADSETS HANDS FREE TELEPHONE HEADSETS Calrad’s telephone headsets help reduce phone fatigue and provides hands-free convenience for working on computer data entry, taking notes, and in fact do the work you need to do and talk on the phone at the same time. Adjustable volume control, telephone/headset selection switch, voice mute button. All units come with base unit, headset, and cables. 70-600 TELEPHONE LINE POWERED This unit works directly when connected to your telephone. Requires two AA batteries, not included. 70-601 BATTERY POWERED This unit works with most home type instruments. A selectable configuration switch is provided on the side of the unit for easy interfacing to your telephone equipment. This unit connects to your handset jack on the telephone. Two AA batteries not included. 70-602 BATTERY / DC POWERED This unit works with most business type instruments. A selectable configuration switch is provided on the side of the unit for easy interfacing to your telephone equipment. This unit easily connects to your handset jack on the telephone. A small opening on the front of the unit is provided so that a small phillips screwdriver can be used to adjust the microphone gain. Two AA batteries/AC adapter not included. AC adapter is 45-756-S. FLUSH MOUNT, SINGLE-JACK FLUSH MOUNT, MODULAR WALL PLATES DECORA STYLE For new construction or conversion to modular instruments. Screw terminals. MODULAR WALL PLATES 70-403 ..................................................4-Wire, Ivory Wall plates designed to accept 70-403-W ..........................................4-Wire, White modular plugs. -
Manual Will Indicate Which Sections Apply to the Different Programming Modes and Setups
INSTALLATION INSTRUCTIONS MX88 EIGHT ZONE – EIGHT SOURCE AUDIO & AUDIO/VIDEO CONTROLLER/AMPLIFIER Page: 2 Model MX88 IMPORTANT SAFETY INSTRUCTIONS - READ BEFORE OPERATING EQUIPMENT CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK) NO USER-SERVICEABLE PARTS INSIDE REFER SERVICING TO QUALIFIED SERVICE PERSONNEL The lightning flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of un-insulated “dangerous voltage” within the product‟s enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. WARNING TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE. This product was designed and manufactured to meet strict quality and safety standards. There are, however, some installation and operation precautions, which you should be particularly aware of. 1. Read Instructions – All the safety and operating instructions should be read before the appliance is operated. 2. Retain Instructions – The safety and operating instructions should be retained for future reference. 3. Heed Warnings – All warnings on the appliance and in the operating instructions should be adhered to. 4. Follow Instructions – All operating and use instructions should be followed. 5. Water and Moisture – The appliance should not be used near water – for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, etc. 6. -
Whitepaper: Understanding Ethernet Patch Cords in Modern Networks
Intelligently Designed Rack and Cable Management UNDERSTANDING ETHERNET PATCH CORDS IN MODERN NETWORKS Louis Chompff - Founder & Managing Director © 2020 AnD Cable Products Inc. andcable.com UUNDERSTANDINGNDERSTANDING EETHERNETTHERNET PPATCHATCH CCORDSORDS IN MMODERNODERN NENETWORKSTWORKS Copyright ©AnD Cable Products Inc. 2020. All Table of Contents rights reserved. This whitepaper and its content is 1. Ethernet Patch Cords and RJ-45 Connectors 3 copyright of AnD Cable Products Inc. Any redistribution or reproduction of part or all of the contents in any form is 2. Ethernet Patch Cords and UTP Cabling 4 prohibited other than the following: • you may print or locally download for 3. What’s All the Twisting About? 5 your personal and non-commercial use only • you may copy the content to individual 4. Ethernet Applications 7 third parties for their personal use, but only if you acknowledge AnD Cable 5. 568A and 568B Wiring Standards 7 Products Inc. as the source of the material You may not, except with our express written 5.1 Beware of Copper Clad Aluminum 8 permission, distribute or commercially exploit (CCA) Cables the content. Nor may you transmit it or store it in any other website or other form of electronic retrieval system. 6. Which One to Use? 10 7. Straight-Through and Crossover Cables 10 7.1 Data Communications Equipment (DCE) 12 and Data Terminal Equipment (DTE) 8. Glossary 14 About the Author 15 Celebrating over 30 years’ experience in the Manufacture and Supply of Cable Management and Rack Management Products andcable.com UUNDERSTANDINGNDERSTANDING EETHERNETTHERNET PPATCHATCH CCORDSORDS IINN MMODERNODERN NNETWORKSETWORKS Ethernet patch cables have modular characteristics and some important differences that can limit their interchangeability. -
Adslme1 User Guide.Qxd
Instant BroadbandTM Series ADSL Ethernet Modem Use this guide to install the following: Model No.: ADSLME1 User Guide COPYRIGHT & TRADEMARKS Copyright© 2001 Linksys, All Rights Reserved. Instant Broadband is a registered trade- mark of Linksys. Microsoft, Windows, and the Windows logo are registered trademarks of Microsoft Corporation. All other trademarks and brand names are the property of their respective proprietors. LIMITED WARRANTY Linksys guarantees that every Instant Broadband ADSL Ethernet Modem is free from physical defects in material and workmanship for one year from the date of purchase, when used within the limits set forth in the Specification section of this User Guide. If these products prove defective during this warranty period, call Linksys Customer Support in order to obtain a Return Authorization Number. BE SURE TO HAVE YOUR PROOF OF PURCHASE AND A BARCODE FROM THE PRODUCT'S PACKAGING ON HAND WHEN CALLING. RETURN REQUESTS CANNOT BE PROCESSED WITHOUT PROOF OF PURCHASE. When returning a product, mark the Return Authorization Number clearly on the outside of the package and include your original proof of pur- chase. All customers located outside of the United States of America and Canada shall be held responsible for shipping and handling charges. IN NO EVENT SHALL LINKSYS’ LIABILITY EXCEED THE PRICE PAID FOR THE PROD- UCT FROM DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAM- AGES RESULTING FROM THE USE OF THE PRODUCT, ITS ACCOMPANYING SOFT- WARE, OR ITS DOCUMENTATION. LINKSYS DOES NOT OFFER REFUNDS FOR ANY PRODUCT. Linksys makes no warranty or representation, expressed, implied, or statuto- ry, with respect to its products or the contents or use of this documentation and all accompanying software, and specifically disclaims its quality, performance, mer- chantability, or fitness for any particular purpose. -
MODEM 32Fast
JANUARY 1995 MD855A-R2 MODEM 32Fast 34336 MODEM ENT 3 2 1 3 2 1 CUSTOMER Order toll-free in the U.S. 24 hours, 7 A.M. Monday to midnight Friday: 877-877-BBOX SUPPORT FREE technical support, 24 hours a day, 7 days a week: Call 724-746-5500 or fax 724-746-0746 INFORMATION Mail order: Black Box Corporation, 1000 Park Drive, Lawrence, PA 15055-1018 Web site: www.blackbox.com • E-mail: [email protected] MODEM 32Fast FEDERAL COMMUNICATIONS COMMISSION AND INDUSTRY CANADA RADIO FREQUENCY INTERFERENCE STATEMENT This equipment generates, uses, and can radiate radio frequency energy and if not installed and used properly, that is, in strict accordance with the manufacturer’s instructions, may cause interference to radio communication. It has been tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when the equipment is operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will be required to take whatever measures may be required to correct the interference. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. This digital apparatus does not exceed the Class A limits for Radio noise emission from digital apparatus set out in the Radio Interference Regulation of Industry Canada. Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applicables aux appareils numériques de la classe A prescrites dans le Règlement sur le brouillage radioélectrique édicté par Industrie Canada. -
Voip My House -- How to Quickly Distribute a Voip Phone Line to Your Entire House Voip My House How to Quickly Distribute a Voip Phone Line to Your Entire House
VoIP My House -- How to quickly distribute a VoIP phone line to your entire house VoIP My House How to quickly distribute a VoIP phone line to your entire house - Unlimited calling to U.S. and over 60 other countries - $10/month for 6 months, then $28/month - Sign up and get a $50 e-gift card - Get full details TIP: Review this entire web page article before working on your house, especially the DSL warning [§20] and Disclaimer [§23]. 1. VoIP - the new way 10. Ringer Equivalence 20. DSL warning 2. POTS - the old way Number 21. The cost of 'always 3. VoIP advantages 11. Twisted Pairs on' 4. VoIP disadvantages 12. Structured Wiring 22. More Information 5. POTS network 13. Alarm systems 23. Disclaimer interface 14. Color coding standards 24. Feedback 6. POTS phone jack 15. Safest VoIP solution 7. VoIP phone jack 17. Phone line polarity 8. The VoIP solution 18. Splicing wires 9. An ounce of 19. Verizon sucks prevention 1. VoIP - Phone service the new way VoIP = Voice over IP (internet) Most of us have high speed Internet in our homes -- so why not use the Internet to connect your whole house directly to a new (and cheaper) phone company's network? Quite simply, that is what VoIP can do for you. VoIP: 'Voice over IP': Connecting to a newer phone company's network directly (via the Internet instead of by dedicated copper wire), providing you with a device which provides phone service (a dial tone). And yes, you can connect your whole house to VoIP [§8], and you can continue to use all of the phones that you are using right now.