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U.S. Robotics Corp.
U.S. Robotics Corporation, often called USR, is a company that produces USRobotics computer modems and related products. Its initial marketing was aimed at bulletin board systems, where its high-speed HST protocol made FidoNet transfers much faster. During the 1990s it became a major consumer brand with its Sportster line. The company had a reputation for high quality and support for the latest communications standards as they emerged, notably in its V.Everything line, released in 1996. With the reduced usage of voiceband modems in North America in the early 21st century, USR began branching out into new markets. The company purchased Palm, Inc. for its Pilot PDA, but was itself purchased by 3Com soon after. 3Com spun off USR again in 2000, keeping Palm and returning USR to the now much smaller modem market. After 2004 the company is formally known as USR. USR is now a division of UNICOM Global, and is one of the few providers left in the modem market today. The division employ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Division (business)
A division, sometimes called a business sector or business unit (segment), is one of the parts into which a business, organization or company is divided. Overview Divisions are distinct parts of a business. If these divisions are all part of the same company, then that company is legally responsible for all of the obligations and debts of the divisions. In the banking industry, an example would be East West Bancorp and its primary subsidiary, East West Bank. Legal responsibility Subsidiaries are separate, distinct Commercial law, legal entities for the purposes of taxation, regulation and Legal liability, liability. For this reason, they differ from divisions, which are businesses fully integrated within the main company, and not legally or otherwise distinct from it. The ''Houston Chronicle'' highlighted that the creation of a division "is substantially easier than developing subsidiaries. Because a division is an internal segment of a company, not an entirely separate enti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Skokie, Illinois
Skokie (; formerly Niles Center) is a Village (United States), village in Cook County, Illinois, United States. According to the 2020 United States census, 2020 census, its population was 67,824. Skokie lies approximately north of Chicago's downtown Loop. The name Skokie comes from a Potawatomi language, Potawatomi word for 'marsh'. For many years, Skokie promoted itself as "The World's Largest Village". Skokie's streets, like that of many suburbs, are largely a continuation of the Roads and expressways in Chicago, Chicago street grid, and the village is served by the Chicago Transit Authority, further cementing its connection to the city. Skokie was originally a Germans, German-Luxembourger farming community, but was later settled by a sizeable Jews, Jewish population, especially after World War II. At its peak in the mid-1960s, 58% of the population was Jews, Jewish, the largest proportion of any Chicago suburb. Skokie still has many Jewish residents (now about 30% of the pop ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fax Modem Antigo
Fax (short for facsimile), sometimes called telecopying or telefax (short for telefacsimile), is the telephonic transmission of scanned printed material (both text and images), normally to a telephone number connected to a printer or other output device. The original document is scanned with a fax machine (or a telecopier), which processes the contents (text or images) as a single fixed graphic image, converting it into a bitmap, and then transmitting it through the telephone system in the form of audio-frequency tones. The receiving fax machine interprets the tones and reconstructs the image, printing a paper copy. Early systems used direct conversions of image darkness to audio tone in a continuous or analog manner. Since the 1980s, most machines transmit an audio-encoded digital representation of the page, using data compression to transmit areas that are all-white or all-black, more quickly. Initially a niche product, fax machines became ubiquitous in offices in the 1980s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sysop
A sysop (, an abbreviation of system operator) is an administrator of a multi-user computer system, such as a bulletin board system (BBS) or an online service virtual community.Jansen, E. & James, V. (2002). NetLingo: the Internet dictionary. Netlingo Inc., Oxnard, CA The phrase may also be used to refer to administrators of other Internet-based network services.Rhodes, D. & Butler, D. (2002). Solaris Operating Environment Boot Camp. Prentice Hall Professional. Sysops typically do not earn money, but donate their activity to the community. Co-sysops are users who may be granted certain admin privileges on a BBS. Generally, they help validate users and monitor discussion forums. Some co-sysops serve as file clerks, reviewing, describing, and publishing newly uploaded files into appropriate download directories.Gupta, A. (2004). Hacking In The Computer World. Mittal Publications. Historically, the term ''system operator'' applied to operators of any computer system, especially a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bulletin Board System
A bulletin board system (BBS), also called a computer bulletin board service (CBBS), is a computer server running list of BBS software, software that allows users to connect to the system using a terminal program. Once logged in, the user performs functions such as uploading and downloading software and data, reading news and bulletins, and exchanging messages with other users through public Internet forum, message boards and sometimes via direct synchronous conferencing, chatting. In the early 1980s, message networks such as FidoNet were developed to provide services such as M+NetMail, NetMail, which is similar to internet-based email. Many BBSes also offered BBS door, online games in which users could compete with each other. BBSes with multiple phone lines often provided chat rooms, allowing users to interact with each other. Bulletin board systems were in many ways a precursor to the modern form of the World Wide Web, social networking service, social networks, and other aspe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hayes Microcomputer Products
Hayes Microcomputer Products was a US-based manufacturer of modems. The company is known for the Smartmodem, which introduced a control language for operating the functions of the modem via the serial interface, in contrast to manual operation with front-panel switches. This ''smart modem'' approach dramatically simplified and automated operation. Today almost all modems use a variant of the Hayes AT command set. Hayes was a major brand in the modem market from the introduction of the original 300 bit/s Smartmodem in 1981. They remained a major vendor throughout the 1980s, periodically introducing models with higher throughput. Their competition through this period was primarily from two other high-end vendors, USRobotics and Telebit, while other companies mostly sold into niches or were strictly low-end offerings. In the early 1990s a number of greatly cost-reduced high-performance modems were released by competitors, notably the SupraFAXModem 14400 in 1992, which eroded pri ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telebit
Telebit Corporation was a US-based modem manufacturer, known for their TrailBlazer series of high-speed modems. One of the first modems to routinely exceed 9600 bit/s speeds, the TrailBlazer used a proprietary modulation scheme that proved highly resilient to interference, earning the product an almost legendary reputation for reliability despite mediocre (or worse) line quality. They were particularly common in Unix installations in the 1980s and 1990s. The high price of the Telebit modems was initially not a concern as their performance was equally high compared to other systems. However, as new designs using V.32 and V.32bis began to arrive in the early 1990s, Telebit's price/performance ratio was seriously eroded. A series of new designs followed, but these never regained their performance lead. By the mid-1990s the company had been part of a series of mergers and eventually disappeared in 1998 after being acquired by Digi International. Startup Telebit was founded by Paul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trellis Modulation
Trellis coded modulation (TCM) is a modulation scheme that transmits information with high efficiency over band-limited channels such as telephone lines. Gottfried Ungerboeck invented trellis modulation while working for IBM in the 1970s, and first described it in a conference paper in 1976. It went largely unnoticed, however, until he published a new, detailed exposition in 1982 that achieved sudden and widespread recognition. In the late 1980s, modems operating over plain old telephone service (''POTS'') typically achieved 9.6 kbit/s by employing four bits per symbol QAM modulation at 2,400 baud (symbols/second). This bit rate ceiling existed despite the best efforts of many researchers, and some engineers predicted that without a major upgrade of the public phone infrastructure, the maximum achievable rate for a POTS modem might be 14 kbit/s for two-way communication (3,429 baud × 4 bits/symbol, using QAM). 14 kbit/s is only 40% of the theoretical maximum bit ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
AT&T
AT&T Inc., an abbreviation for its predecessor's former name, the American Telephone and Telegraph Company, is an American multinational telecommunications holding company headquartered at Whitacre Tower in Downtown Dallas, Texas. It is the world's List of telecommunications companies, third largest telecommunications company by revenue and the List of mobile network operators in the United States, third largest wireless carrier in the United States behind T-Mobile US, T-Mobile and Verizon. As of 2023, AT&T was ranked 32nd on the Fortune 500, ''Fortune'' 500 rankings of the largest United States corporations, with revenues of $122.4 billion. The modern company to bear the AT&T name began its history as the American District Telegraph Company, formed in St. Louis in 1878. After expanding services to Arkansas, Kansas, Oklahoma and Texas through a series of mergers, it became the Southwestern Bell Telephone Company in 1920. Southwestern Bell was a subsidiary of AT&T Corporation, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
USRobotics Courier 2400 Modem With Serial Cable
U.S. Robotics Corporation, often called USR, is a company that produces USRobotics computer modems and related products. Its initial marketing was aimed at bulletin board systems, where its high-speed HST protocol made FidoNet transfers much faster. During the 1990s it became a major consumer brand with its Sportster line. The company had a reputation for high quality and support for the latest communications standards as they emerged, notably in its V.Everything line, released in 1996. With the reduced usage of voiceband modems in North America in the early 21st century, USR began branching out into new markets. The company purchased Palm, Inc. for its Pilot 1000, Pilot personal digital assistant, PDA, but was itself purchased by 3Com soon after. 3Com spun off USR again in 2000, keeping Palm and returning USR to the now much smaller modem market. After 2004 the company is formally known as USR. USR is now a division of UNICOM Global, and is one of the few providers left in the mo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of ITU-T V-series Recommendations
The ITU-T V-Series Recommendations on Data communication over the telephone network specify the protocols that govern approved modem communication standards and interfaces. Note: the ''wikt:bis#Latin, bis'' and ''wikt:ter#Latin, ter'' suffixes are ITU-T standard designators of successive iterations of a standard (''bis'' and ''ter'' are the Latin words for "twice" and "thrice"). General standards ''Applies to V.1–V.9'' * V.1 is an ITU-T recommendation, entitled ''Equivalence between binary notation symbols and the significant conditions of a two-condition code.'' * V.2 is an ITU-T recommendation, approved in November 1988, titled ''Power levels for data transmission over telephone lines.'' * V.4 is an ITU-T recommendation, approved in November 1988, titled ''General structure of signals of International Alphabet No. 5 code for character oriented data transmission over public telephone networks.'' * V.5 was an ITU-T recommendation, approved in November 1988, titled ''Stand ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bell 212A
The Bell 212A modulation scheme defined a standard method of transmitting full-duplex asynchronous or synchronous serial data at 1200 bits per second (bit/s) over analogue transmission lines. The equivalent, but incompatible ITU-T standard is V.22. Device The Bell 212 Dataset is a 1979-vintage modem used for communicating over telephone lines at 300 or 1200 bit/s. The 212A standard provides for the ability of a modem to auto-answer a ringing phone. Usage The Bell 212A scheme was the most common standard used for 1200 bit/s transmission on US data networks such as CompuServe during the 1980s and 1990s, when dial-up access to time-sharing services was the norm, and, starting in 1989, dial-up Internet access Dial-up Internet access is a form of Internet access that uses the facilities of the public switched telephone network (PSTN) to establish a connection to an Internet service provider (ISP) by dialing a telephone number on a conventional telepho ....Frank J. Derfler Jr."Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
