Deleted image removed Image Netgear cmd31t.png thumb right 150px Netgear cablemodem model CMD31T. One ... 3.0 cablemodem refimprove date August 2010 A cablemodem is a type of network bridge and modem that provides ... cablemodem system in 1990. A key Hybrid Networks insight was that highly asymmetrical communications ... cablemodem systems today. LANcity LANcity was an early pioneer in cable modems, developing a proprietary ... by Nortel , which eventually spun the cablemodem business off as ARRIS . ARRIS continues to make ... Corporation Zenith offered a cablemodem technology using its own protocol which it introduced in 1993, being one of the first cablemodem providers. The Zenith CableModem technology was used ... Publications url http books.google.com books?id 06uBL8vGpoIC&pg PA765&dq zenith cablemodem v onepage&q ... ends, the ComPort cablemodem in various models and the NMAPS management system using HP OpenView as platform ... cable modems. The Australia n ISP BigPond employed this system when it started cablemodem tests ... 1990s the IEEE 802 committee formed a subcommittee 802.14 to develop a standard for cablemodem ... cablemodem specification. The group essentially combined technologies from the two dominant proprietary systems at the time, taking the physical layer from the Motorola CableModem CDLP CDLP ... program for cablemodem equipment, and has since drafted multiple extensions to the original specification ... is higher amongst cablemodem users. Citation needed date January 2009 Any high speed Internet service ... as an embedded multimedia terminal adapter E MTA will often be used. An E MTA is a cablemodem and a VoIP ... functions In network topology, a cablemodem is a network bridge that conforms to IEEE 802.1D for Ethernet networking with some modifications . The cablemodem bridges Ethernet frames between a customer ... to the OSI model of network design, a cablemodem is both Physical Layer Layer 1 device and a Data ... HFC cable interface. The term cablemodem refers to this cable specific PHY. The Network Layer Layer ... more details
Image CMTS frontside.jpg right thumb Cablemodem terminations system A cablemodem termination system or CMTS is a piece of equipment typically located in a cable television cable company s Cable television headend headend or hubsite, and used to provide high speed data services, such as Cablemodemcable Internet or voice over Internet Protocol , to cable subscriber s. A CMTS provides many of the same ... side of the headend, the CMTS enables the communication with subscribers cablemodem s. Different CMTSs are capable of serving different cablemodem population sizes ranging from 4,000 cable modems ... the cablemodem population served by that headend or Hybrid fibre coaxial HFC hub . One way to think ... interfaces carry RF signals to and from the subscriber s cablemodem. In fact, most CMTSs have both ... at the cablemodem in the subscriber s home. Traffic from a subscriber s home system goes through the cablemodem and out to the Internet in the opposite direction. CMTSs typically carry only Internet Protocol IP traffic. Traffic destined for the cablemodem from the Internet, known as downstream ... bridge or Router computing router . A customer s cablemodem cannot communicate directly with other modems on the line. In general, cablemodem traffic is routed to other cable modems or to the Internet ... Community DEFAULTSORT CableModem Termination System Category Digital cable Category Internet access cs CMTS de CableModem Termination System es CMTS he CMTS mk nl Cablemodem termination system no CMTS pl CableModem Termination System sv CMTS ... In order to provide these high speed data services, a cable company will connect its headend ... interface, through the CMTS and then onto the RF interfaces that are connected to the cable company ... QAM versions of quadrature amplitude modulation . Upstream data data from cable modems to the headend ... sharing mechanisms. This is done at the subband or return portion of the North American cable television ... more details
cleanup date February 2010 Orphan date April 2009 Zenith CableModem is one of the first proprietary cablemodem s deployed at limited scale. There were 2 basic models, one operating at 500 kbit s, the other at 4 Mbit s using BPSK and about a 25 alpha. History The Zenith cablemodem was originally developed for a mid split cable network in the mid 1980s, and used an 8 bit 8 bit full height IBM Personal ... to support the Prodigy CableModem trial begun on a 1500 homes passed fiber node in El Cajon, CA ... of a Prodigy server in the El Cajon headend, connected via the Microchannel based cablemodem to an Olsen ... a residential cablemodem inside a server, and a frequency translator to convert the upstream transmit ... section date January 2010 The commercial prospects of Prodigy over cablemodem came to reality when ... release 9.32, under the title Node Data Controller SNMP Provisioning a Zenith CableModem The physical ... to disable a modem remotely. Installing an internal Zenith CableModem br Step 1 Verify there is a free ... hardware addition would always cause blue screen, and disable the Zenith CableModem. Yes, the internal ... the cablemodem, PLL unlocked, power cycle to resolve. br 8 Channelmizer lock up , cell phone used near headend cablemodem, PLL unlocked. Power Cycle to resolve. br 9 Frequency translator drift, resolution ... products. Downstream input to each cablemodem of 5 dBmV 2 dB. Due to the non existence ... w internal cablemodem, and somebody to manually move the test connection between frequency translators ... would cause each cablemodem to transition from purple to blue hundreds of times per day. HPOV could ... at Cogeco in Canada Cogeco in Canada launched with the 4 Mbit s, external Rev D cablemodem in roughly ... updated their white modems to a matte black case, adding the Homeworx name, and marketing to cable ... 16 bit 16 bit version. The new design dropped the onboard CPU. The modem connected to the card using ... were powered by the PC. The new modem was frequency agile, with a configuration utility that ran ... more details
also called COFDM, for digital TV in much of the world . Cablemodem s use a range of frequencies ...otheruses pp move indef refimprove date October 2010 A modem mo dulator dem odulator is a device that modulates ... . The most familiar example is a voice band modem that turns the digital data of a personal computer ... can be transmitted over telephone lines and demodulated by another modem at the receiver side to recover ..., or the number of times per second the modem sends a new signal. For example, the ITU V.21 standard ... multiplex equipment that met the definition, but the modem function was incidental to the multiplexing ... or 1,270 Hertz Hz and the answering modem transmitting at 2,025 or 2,225 Hz. The readily available ... , and the IBM 2741 . AT&T reduced modem costs by introducing the originate only 113D and the answer ... The Novation CAT acoustically coupled modem For many years, the Bell System AT&T maintained a monopoly ..., AT&T introduced the 212A modem to compete with Vadic. It was similar in design to Vadic s model, but used the lower frequency set for transmission. It was also possible to use the 212A with a 103A modem ... incompatible with acoustic coupling, thereby locking out many potential modem manufacturers. In 1977, Vadic responded with the VA3467 triple modem, an answer only modem sold to computer center operators ... of BBSes Image fax modem antigo.jpg thumb left US Robotics Sportster 14,400 Fax modem 1994 ... . The Smartmodem was an otherwise standard 103A 300 bit s modem, but was attached to a small controller .... With the Smartmodem, the computer could dial the phone directly by sending the modem a command, thus ... cost server side modem on the market, and the BBSs flourished. Almost all modern modems can interoperate ... sent over a high speed commonly 14.4 kbit s modem. Software running on the host computer can convert any image into fax format, which can then be sent using the modem. Such software was at one ... thumb right A PCI Winmodem softmodem on the left next to a traditional ISA modem on the right . Main ... more details
to connect two teleprinters directly without modems null modem then they would crosslink the connections. The term null modem may also refer to the cable or adaptor itself as well as the connection method. Null modem cables were popular means of transferring data between the early personal computers in the 1980s and early 1990s. Cables and adapters file Null modemcable 1.jpg thumb A null modemcable A null modemcable is an RS 232 serial cable where the transmit and receive lines are crosslinked ... serial cable is used, together with a null modem adapter computing adapter . The adapter contains ... of null modem cables less common. Nowadays, such a cable can still be useful for Kernel computer science ... modemcable is a rollover cable that just reverses pins 1 through 8 on one end to 8 through ... Because of the compatibility issues and potential problems with a simple null modemcable, a solution ... port redirector Virtual Serial Port virtual serial port . Unlike a null modemcable, a virtual null ... by an application to form a virtual null modem communication path. See also Crossover cable Rollover ... serial null modemcable wiring and tutorial publisher Lammertbies.nl date accessdate 2011 04 19 cite ... Summary N8VB vCOM Virtual Null ModemCable publisher Developer.berlios.de date 2005 07 15 accessdate ...No footnotes date April 2011 file Null modem.jpg thumb A null modem adapter Null modem is a communication ... printer printer etc. directly using an RS 232 serial cable . The name stems from the historical use of the RS 232 cable to connect two teleprinter devices to modem s in order to communicate with one another null modem communication was possible by instead using RS 232 to connect the teleprinters ... equipment DCE e.g. a modem . With a null modem connection the Transmission telecommunications ... handshaking handshake lines are crosslinked. Several wiring layouts are in use because the null modem .... Each teleprinter would be physically connected to its modem via an RS 232 connection and the modems ... more details
Infobox Computer name Apple USB Modem developer Apple Inc. type USB modem photo File Apple usb modem.jpg ... United States dollar US 49 website http support.apple.com kb HT3152 The Apple USB Modem was a combined 56 kbit s data modem and 14.4 kbit s fax external USB modem introduced by Apple Inc. after the internal 56k modem was dropped on the October 12, 2005 iMac G5 revision. History Apple introduced its first true modems in 1984, the Apple Modem 300 & 1200 modems ITU T V Series Recommendations ... Recommendations V29 Apple Fax Modem in 1987. Apple introduced the internal 2400 data fax modem card for its Macintosh Portable in 1989 as well as released its last external desktop Apple Data Modem ... Express Modem . The Apple USB Modem is Apple s first true external modem since the Apple Data Modem ... driver exists and therefore the modem will not operate in operating systems operating in 64 bit mode. This means that the USB modem does not work in Mac OS X Lion, 10.7 per telephone call to Apple Care, July 22, 2011 . Features The Apple USB Modem supports V.92 , Caller ID , wake on ring, telephone answering V.253 , and modem on hold. The modem is manufactured by Motorola . A device driver for the modem ... of its introduction. Apart from using the Apple USB Modem for Internet dial up and faxing, it is also ... machine software. The decision to drop the built in dial up modem is reminiscent of Apple s decision ... of a cigarette lighter and with a 4.6 inch long USB cable, won a RED DOT design award for good ... connector affects the USB external modem. Placing the modem away from the MagSafe socket on the farthest USB connector will keep your connection from dropping frequently. If the internal modem is not answering rings, verify that you do not have Wake when the modem detects a ring option checked ... links http docs.info.apple.com article.html?artnum 303262 Apple USB Modem Frequently Asked Questions ... Category USB ru Apple USB Modem ... more details
Image Famicom Network System.jpg thumb 200px right The Famicom Modem The nihongo Famicom Modem lit. Family Computer Network System is a video game peripheral for Nintendo Entertainment System Family Computer released only in Japan in 1988. ref http www.famitsu.com game news 2006 03 25 103,1143298259,50588,0,0.html Wi Fi 40 . Famitsu . 25 March 2006. ref It allowed the user access to a server that provided cheating in video games game cheats , jokes, weather forecasts, and a small amount of downloadable content. It could also be used to make live stock trades. Unlike the NES Teleplay Modem , it did not provide online play. The idea of downloading content would later be used in the Super Nintendo s Satellaview , the Nintendo 64DD , the Nintendo GameCube GameCube , the Nintendo GameCube Game Boy Advance cable Game Boy Advance Cable , the Nintendo DS s DS Download Play, the Wii s WiiConnect24 , the Nintendo DSi s DSi Shop, and the Nintendo 3DS Nintendo eShop eShop . See also Atari 2600 s GameLine Intellivision s PlayCable Famicom Disk System Mega Drive Sega Genesis s Sega Channel Nintendo Entertainment System s Teleplay Modem Super Nintendo Entertainment System Super Famicom s Satellaview References reflist External links http www.siliconera.com 2006 09 05 nintendos secret online past the famicom modem The Famicom Modem Category Nintendo Entertainment System accessories Category Nintendo hardware Category Online gaming services Category Japan only video game hardware fr Famicom MODEM ... more details
modem A digital subscriber line DSL modem is a device used to connect a computer or Router computing router to a telephone circuit that has digital subscriber line service configured. Like other modem ... . Typical user interfaces are Ethernet and Universal Serial Bus USB . Although a DSL modem working ... purposes. Compared to voice band modem A DSL modem modulates high frequency tones for transmission to a digital .... It serves fundamentally the same purpose as the Dial up modem Narrow band.2Fphone line dialup modems voice band modem that was a mainstay in the late 20th century, but differs from it in important ways. DSL modems transfer data at a rate which is typically 10 to 20 times that of a voice band modem. A single telephone line can be used for simultaneous voice and data with a DSL modem whereas a voice band modem precludes simultaneous voice traffic. Most DSL modems are external to the computer ... such as webcam s, mice, keyboards etc. . Most DSL modems and DSL modem routers can be configured manually, using a Web page provided by the modem via the Ethernet that the router connects to. The confs generally to open a browser , type the DSL modem s LAN IP address in the browser s address ... cable CAT5 to another one telephone line . For external DSL modems connected by USB , Microsoft Windows ... on a line which is being used by a voice band modem. DSL modems vary in data speed from hundreds of kilobits per second to many megabits, while voice band modems are nominally 56K modem s and actually ... and voice, DSL filter s are used to separate the two uses. Hardware components File ADSL modem router internals labeled.jpg thumb ADSL modem router internals labeled Commented out Image ADSL Modem Chip.jpg right thumb Inside component chip of a typical ADSL modem. As technology advances, functions ... of integration have benefited DSL just as they benefited other computer hardware. A DSL modem requires ... Modem and Router Reviews Whirlpool DSL Modem reviews http www.adslgeek.com dslmodem ADSL Geek DSL ... more details
card must be swapped with a line card that supported the 1 Meg Modem and also a card must be added to the drawer that would manage all data from the 1 Meg Modem cards in the drawer. History At the time the modem was released When date July 2011 telephone companies were fearing competition from cablemodem s. However, early DSL technology was too costly for wide deployment. By October 1998 Nortel ...The 1 Meg Modem in telecommunications was ref cite web title 1 Meg Modem End of Life url http support.nortel.com go main.jsp?cscat OVERVIEW&poid 8061 work archiveurl http www.webcitation.org 5gJ2nHcFm archivedate 2009 04 25 deadurl no accessdate 2009 04 20 ref a DSL modem created by Nortel which conforms to the ADSL Lite standard. ref name modemhelp cite web url http www.modemhelp.org dsl.html title Highspeed Alternatives DSL accessdate 2006 08 06 publisher ModemHelp.Org ref The 1 Meg Modem was the first xDSL modem to gain approval and registration under FCC Part 68 Rules. ref http findarticles.com p articles mi hb5243 is 199909 ai n20147992 NORTEL NETWORKS Nortel Networks 1 Meg Modem re receives FCC Part 68 Rules approval and registration ref Technical details The 1 Meg Modem can be deployed up to convert 18000 ft m from the central office providing a downstream networking downstream bit ... url http www.nortel.com products 01 dms 10 fpg collateral 1mmpsi.pdf title Nortel 1 Meg Modem Next ... to carry data, the 1 Meg Modem used Ethernet which makes the product easy for most residential users ... 21, 1998 title Nortel Networks Expands 1 Meg Modem CPE Portfolio url http www.prnewswire.com cgi ... title Nortel fills gap between analog, DSL New 1 Meg Modem promises affordable high speed access url ... 06 ref ref name nytimes cite web last Austen first Ian date April 30, 1998 title Modem Lite Offers ... is 199909 ai n20147992 NORTEL NETWORKS Nortel Networks 1 Meg Modem re receives FCC Part 68 Rules approval ... 0000707569&EDATE Nortel Northern Telecom 1 Meg Modem Declared the Most Practical High Speed Access ... more details
A satellite modem or sat modem is a modem used to establish data transfer s using a communications satellite as a relay . There are a wide range of satellite modems from cheap devices for home internet access to expensive multifunctional equipment for enterprise use. A modem stands for modulator demodulator . A satellite modem s main function is to transform an input bitstream to a radio signal and vice versa. There are some devices that include only a demodulator and no modulator, thus only allowing ... PSTN modem or an ADSL modem . Satellite link Main Satellite link A satellite modem is not the only ... to a modem from Data terminal equipment e.g. a computer . The modem usually has Intermediate ... by a modem, and at last handled by data terminal equipment. The LNB is usually powered by the modem through the signal cable with 13 or 18 V Direct current DC .. Features The main functions of a satellite modem are modulation and demodulation. Satellite communication standards also define error ... Embedded Distant end Monitor and Control EDMAC , allowing to control the distant end modem Automatic ... to replace some channels in it. Internal structure Image Satellite modem block diagram.png right thumb 500px Satellite modem s internal structure Probably the best way of understanding modem s work is to look at its internal structure. A block diagram of a generic satellite modem is shown on the image ... which it consists of. Satellite modem doesn t have so many outputs, so a demultiplexer here performs ... Modem front.jpg thumb right The IPmodem satellite modem developed and made by Newtec of Belgium ... use a return channel not based on communication with the satellite, such as telephone or cable TV cable . Two way satmodems DVB RCS modems, also called astromodems employ a satellite based return channel ... access Very small aperture terminal VSAT External links http www.newtec.eu Newtec satellite modem ... satellite modem gsm gprs satellite modem.htm GSM GPRS satellite modem provider Satcomm Category ... more details
wiktionary modem A modem is a device that encodes and decodes digital data transmitted by a telephone or other analog communications system. Modem may also refer to Mr. Modem Richard A. Sherman , an American author, syndicated columnist, and talk show host Democratic Movement France MoDem Mouvement D mocrate , a centrist and pro European French political party disambig eu Modem argipena ... more details
computer an access point to a network. The modems may be as large as a regular cablemodem to as small ... products pccards overview ec400g?cc be&lc en Wireless Modem with GPS example the Ericsson EC400g ref ... landline modem could be plugged, this only provided slow dial up connections, usually 2.4 kilobit per ..., and offered faster dial up speeds of 9.6kbit s or 14.4kbit s without the need for a separate modem ... Laptop Netbook mobile modem Dongle Tethering style width 50 vertical align top Smartphones Cellular ... reflist DEFAULTSORT Wireless Modem Category Wireless networking Modem Category Mobile Web Modem Category Modems pam Wireless modem ja ru ... more details
Orphan date February 2009 A modem script is a settings file that some software programs use to communicate with a modem . They are also known as CCL files Connection Control Language files . Like a modem init string, modem scripts files provide modem configuration settings. Modem scripts go beyond init strings by providing an internal scripting language that script authors can use to tune the modem s response. Its main use with Terminal Emulator s and Dialer s. Category Modems Category Scripting languages unreferenced date August 2007 compu lang stub ... more details
In telecommunication , the term wideband modem has the following meanings A modem whose modulated output Signalling telecommunications signal can have an essential frequency spectrum that is broader than that which can be wholly contained within, and faithfully transmitted through, a voice channel communications channel with a nominal 4 kHz Bandwidth signal processing bandwidth . A modem whose bandwidth capability is greater than that of a narrowband modem . References FS1037C MS188 wiktionary Category Networking hardware Category Modems compu hardware stub ... more details
Unreferenced date August 2008 Image PCI V.92 Fax Modem Card Digon3.jpg thumb right A V.92 fax modem card A fax modem enables a computer to transmit and receive documents as fax es. A fax modem is like a data modem but is designed to transmit and receive documents to and from a fax machine or another fax modem. Some, but not all, fax modems do double duty as data modems. As with other modem s, fax modems can be internal or external. Internal fax modems are often called fax boards. In the early 1990s small business PCs commonly had a PC based fax modem card and fax software typically WinFax Pro . Lrgely replaced by E mail , PC based faxing with a fax modem declined at the turn of the century. Where faxing from a PC is required there are a number of Internet fax Internet based faxing alternatives. Where businesses still had one or more traditional fax machines churning out pages, they were usually outnumbered by PCs processing E mail. PC faxing Computer users may set up a PC fax modem with card, telephone line access and software, or use a service similar to printing from a PC or sending an E mail message. Fax integration is available in unified communications e.g. E mail, Voice Mail and Fax managed together , in a number of Business telephone system Hosted PBX systems Hosted PBX products where standard features allow users to send a fax by using the fax phone number as the address of a E mail message, and receive incoming faxes via E mail with the Fax content presented as a PDF attachment. Medical systems continuted to use this technology heavily, but many home users have dropped the use of fax modems in favor of high speed internet . See also Fax Fax demodulator Modem Category Modems Category Fax ... more details
BLP sources date September 2010 Richard Sherman Mr. Modem is an author , syndicated columnist , ref cite news url http www.star telegram.com 2010 08 24 2421789 watch for e mail danger signals.html tvg title Watch for e mail danger signals, Mr. Modem says date August 24, 2010 publisher Star Telegram accessdate 10 September 2010 Dead link date October 2010 bot H3llBot ref Publishing publisher , and Radio personality radio host . He is President of Get the Net, Inc. and the creator and publisher of the online computer and Internet help service and weekly subscription newsletter, http www.mrmodem.com Ask Mr. Modem . As a member of the National Speakers Association, he has presented more than 500 seminars and keynote addresses. He has appeared on approximately 500 radio and TV talk show s, and served as host of the Mr. Modem Minute segments produced by FOX TV. In addition, he co hosts the weekly Gutsy Geeks ref cite web url http www.gutsygeeks.com title Gutsy Geeks publisher Gutsy Geeks accessdate 10 September 2010 ref radio show on 1100 KFNX in Phoenix, Arizona Phoenix, AZ . The Gutsy geeks Gutsy Geeks radio program focuses on helping average users understand the benefits of Linux and Open ... Mr. Modem column appears in more than 140 publications throughout the United States U.S. and Canada . As Mr. Modem , Sherman is a featured columnist in Smart Computing magazine and the financial publication, Making Bread magazine. Among his eight books are Ask Mr. Modem , a collection of answers to hundreds of frequently asked computer and Internet questions, and Mr. Modem s Internet Guide for Seniors ... is Mr. Modem s Web, a CD ROM featuring entertaining and informative profiles of more than 1400 of Mr. Modem s favorite Web sites. References reflist Persondata Metadata see Wikipedia Persondata . NAME Modem, Mr. ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH PLACE OF BIRTH DATE OF DEATH PLACE OF DEATH DEFAULTSORT Modem, Mr. Category Year of birth missing living people Category Living people Category ... more details
Image Teleplay large.jpg thumb 200px right The Teleplay Modem attached to a NES and a Sega Genesis. The Teleplay Modem was a modem for the Nintendo Entertainment System created by Keith Rupp and Nolan Bushnell , designed to provide online play between NES users, while also possessing compatibility with the Sega Genesis and Super Nintendo Entertainment System Super Nintendo . The first prototype, called the Ayota Modem , had a maximum speed of only 300 bit s, too slow to render normal NES quality graphics. It was unveiled at the 1992 consumer electronics show in Las Vegas, where it received a fairly good reception. Bushnell later dropped out of the project, and Keith Rupp founded the company Baton Technologies . He continued to develop the modem, changing its name to the Teleplay Modem, increasing the speed to 2400 bit s, and also conceiving the idea of Sega Genesis and Super Nintendo system compatibility. The modem would also allow cross platform play between Nintendo and Sega with properly coded games. Three games were developed internally Battle Storm, Terran Wars, and Sea Battle but never released. Both Nintendo and Sega refused to license the Teleplay Modem or the games developed for it. Sega instead licensed AT&T to develop a modem the Edge 16 , but no hardware was ever sold at retail. The venture capitalists behind Baton Technologies feared competing against AT&T and attempting to sell hardware games without the all important licensing, so Baton was unable to fulfill its first 300,000 order, and quickly folded thereafter in the summer of 1993. Later Catapult Entertainment developed the 2400 baud XBand modem, similar to the Teleplay Modem in many respects. Although well funded by Old Viacom Viacom , Catapult failed to receive sufficient developer and gamer backing, folding in early 1997. See also Atari 2600 s GameLine Intellivision s PlayCable Sega Genesis s Sega ... s Famicom Modem External links http www.revrob.com sci a tech topmenu 52 38 a complete history of online ... more details
In telecommunication , a narrowband modem is a modem whose modulated output Signalling telecommunication signal has an essential frequency spectrum that is limited to that which can be wholly contained within, and faithfully transmitted through, a voice channel communications channel with a nominal 4 kHz Bandwidth signal processing bandwidth . Note High frequency HF modems are limited to operation over a voice channel with a nominal 3 kHz bandwidth. References FS1037C MS188 Category Modems compu network stub ... more details
The modem tax is a hoax dating back to the days of bulletin board system s stating the Federal Communication Commission or the United States Congress intends to impose a tax on modem use. ref http www.snopes.com inboxer pending internet2.asp ref The FCC has described it as an urban myth . ref http urbanlegends.about.com library blfcc.htm ref References reflist Category Hoaxes in the United States Category Internet hoaxes ... more details
Infobox VG title Modem Wars image File ModemWarsTitleScreen.png 250px Modem Wars caption Title screen developer Ozark Softscape publisher Electronic Arts designer Danielle Bunten Berry Danielle Bunten released 1988 genre Real Time Tactics Citation needed date March 2010 modes Multiplayer ratings N A platforms Commodore 64 C64 br DOS media Floppy disk s requirements Modem Wars is a 1988 Real Time Tactics Citation needed date March 2010 game developed by Ozark Softscape and published by Electronic Arts for the IBM PC and Commodore 64 platforms. ref http www.gamespot.com gamespot features pc unsung heroes sec2 07.html Unsung Heroes Ground Breaking Games Bot generated title ref Summary The first multi computer online game. Modem Wars was played over a modem connection between two machines via telephone or null modem serial connection , with both players controlling a group of robotic units trying to eliminate the opponent s command center. Features such as fog of war , varied unit types, terrain, and formations, all now standards in the genre, were implemented despite the daunting technical ... that Modem Wars was perhaps t he closest predecessor to the groundbreaking and influential Sega ... 1up.com accessdate 2009 01 04 ref Of specific technical interest, Modem Wars has been lauded for its ..., but you accumulate points as if it were a sports game. The name was changed to Modem Wars to call attention to how the game is intended to be played against other humans via modem. The computer AI ... Daniel periodical Computer Gaming World title Modem Wars year 1989 pages 32 35 ref The game also ... noted designer Dan Bunten s intentions for the game blockquote Dan would like us to believe that Modem Wars is a wargame for the rest of us . That is, Modem Wars is a fast moving game that does not get bogged down in the minutia of detail so often associated with wargames. Dan feels that Modem ... modem wars.htm Theodor Lauppert s review Category 1988 video games Category Commodore 64 games Category ... more details
The Pennywhistle was an early acoustic coupler modem originally designed and built by Lee Felsenstein in 1973, and later commercialized and offered for sale in 1976. It was one of the earliest modems available for hobbyist computer users. ref Roy Allan, A History of the Personal Computer The People and the Technology , Allan Publishing, 2001, pg. 17 ref Like most acoustic coupler modems, the Pennywhistle was replaced by the Hayes Microcomputer Products The Smartmodem Hayes Smartmodem and similar models from the early 1980s. History Origins As part of the effort that would lead to the Community Memory bulletin board system , Lee Felsenstein had found an Omnitech modem or something like that . ref name cl Designed to operate at rates as high as 300 bits per second bps , the modem was able to change its speed to match conditions or differences in the modems at either end. In general it was good for only 100 bps, the speed that was used for much of its operational life. The modem was attached to a Teletype Corporation Teletype ASR 33 Teletype Model 33 ASR machine at Leopold s Records in Berkeley, California and connected to the SDS 940 mainframe computer in San Francisco . ref name cl Crosby, ON LINE AT LEOPOLD S ref Felsenstein was unimpressed by the Omnitech design, especially its price of 300, ref name cl and convinced himself he could design a better version. He found that one half of the design problem was easy generating the proper tones for transmission was simple. The other half of the problem was much harder listening to the incoming signal and processing the tones ... MODEM ref Felsenstein found two key improvements that led to a dramatically less expensive and more ... as a fixed difference from the reference signal coming from the PLL. These improvements meant the modem ... would be interested in a related project, a modem that he had previously designed. Spergel was able to cobble together a version of the modem for a price of 109. ref name levy Steven Levy, http books.google.ca ... more details
Radio modems transfer data wirelessly across a range of up to tens of kilometres. Using radio modems is a modern way to create Private Radio Networks PRN . Private radio networks are used in industrial critical applications, when real time data communication is needed. Also Radio Data Modem enables user to be independent of telecommunication or satellite network operators. In most cases users use licensed frequencies either in UHF or VHF band. Licensed frequency is reserved for given user in certain area thus ensuring that there is less likelihood to have radio interference from other RF transmitters . Also licence free frequencies are available in most countries, enabling easy implementation, but at the same time other users may use same frequency, thus making it possible that given frequency is blocked. Typical users for Radio Data Modems are Surveying Land survey differential GPS , fleet management applications, SCADA applications utility distribution networks , automated meter reading AMR , telemetry applications and many more. Since applications usually require high reliability of data transfer and very high uptime, radio performance plays a key role. Factors influencing radio performance are Antenna radio antenna height and type, the Sensitivity electronics sensitivity of the radio, the output power of the radio and the complete system design. References Unreferenced date April 2009 reflist Telecommunications Telecommunications stub DEFAULTSORT Radio Modem Category Wireless networking sv Radiomodem ... more details
Cable length Cable management CablemodemCable reel Cable television Cable tray col 3 Category 5 ... the Grand Coulee Dam throughout. An example of a heavy cable for power transmission. Image Cable tray fire sweden.jpg thumb Fire test in Sweden , showing rapid fire spread through burning of cable jackets. Of great importance for cables used in installations. Image 500mcm cable jacket marking.jpg thumb 500,000 circular mil 254 mm sup 2 sup single conductor power cable A cable is two or more wire s running ... cable contains one or more optical fiber s in a protective jacket that supports the fibers. Electric ... transmission at distances greater than a few kilometres see high voltage cable , power cable s and High ... of the 19th century, manufacture of large Submarine communications cable submarine telegraph cables ... and early 20th century, electrical cable was often insulated using cloth, rubber and paper. Plastic ... wire and cable Copper wires in a cable may be bare, or they may be plated with a thin layer of another ... removal of rubber insulation. Tight lays during stranding makes the cable extensible CBA as in telephone handset cords . Cables can be securely fastened and organized, such as by using trunking, cable trays, cable tie s or cable lacing . Continuous flex or flexible cable s used in moving applications within cable carrier s can be secured using strain relief devices or cable ties. At high frequencies ... and electromagnetic fields Image Coaxial cable cutaway.svg thumb right Coaxial cable. Image USB ... a cable, radiates an electromagnetic field . Likewise, any conductor or cable will pick up energy ... noise which may mask the desired signal being carried by the cable, or, if the cable is carrying .... The first solution to these problems is to keep cable lengths in buildings short, since pick up and transmission are essentially proportional to the length of the cable. The second solution is to route cables away from trouble. Beyond this, there are particular cable designs that minimize electromagnetic ... more details
this maximum speed. While faster communications such as DSL and cablemodem s became widely available ...globalize USA date December 2010 Image US Robotics 56K Modem Front.JPG thumb US Robotics 56K Modem 56k modems are voiceband modems nominally capable of download speeds up to 56 kbit s 56,000 bits per second . In the late 1990s , they were the most popular access method for personal Internet usage, but their use had declined as broadband technologies such as DSL gained wider availability. Speed The 56 kbit s theoretical speed is only possible when the system being dialled into has a digital connection to the telephone system, such as DS0 service. By the time 56k modems came into use, most of the telephone system beyond the local loop was already digital, so the new 56k protocols took advantage ... noise , and there will be too much noise from the second conversion for 56k to work. The modem s negotiation ... voiceband modem is used V.90 recommendation V.90 , or 48.0 kbit s using a digital modem V.92 . Due ... fax es. History Initially there were two rival 56k modem systems. One was K56flex from Rockwell ... which was carefully designed to allow both types of modem to be converted to it by a firmware upgrade ... K56flex a combination of Rockwell s K56Plus and Lucent s V.Flex2 proposals was a proprietary modem ... right X2 Protocol logo X2 was a 56 kbit s modem protocol developed by U.S. Robotics . The protocol ... were also avoided as there was only one X2 standard. V.90 V.90 is an ITU T recommendation for a modem ... Enhancements to Recommendation V.90 , that establishes a modem standard allowing 48 kbit s PCM upload ... Modem on Hold turned off. Quick Connect This reduces negotiation times to around 10 seconds instead of over 20 seconds. Quick connect works by training the client modem on the first call analog and digital characteristics are stored in a local profile, and then retrieved for future connections. Modem ... Modem standards DEFAULTSORT 56 Kbit S Modem Category Telecommunications standards Category ... more details
Unreferenced stub auto yes date December 2009 A modem sharing device MSD , also commonly known as a line sharing device LSD , modem sharer , or line sharer , allows multiple devices to share a Serial communications serial connection. Only multipoint serial protocols such as bisync are supported. Both Synchronization computer science synchronous and asynchronous datastreams can be used. A common example would have a Tandem Computers Tandem as host connected to multiple automatic teller machine s often with a modem or Cisco Systems, Inc. Cisco router computing router in between. DEFAULTSORT Modem Sharing Device Category Networking hardware Compu hardware stub ... more details
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