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Topic: Improved Mobile Telephone Service

	Mobile radio telephone - Wikipedia, the free encyclopedia
		These early mobile telephone systems can be distinguished from earlier closed radiotelephone systems in that they were available as a commercial service that was part of the public switched telephone network, with their own telephone numbers, rather than part of a closed network such as a police radio or taxi dispatch system.
		These mobile telephones were usually mounted in cars or trucks, though briefcase models were also made.
		Typically, the transceiver (transmitter-receiver) was mounted in the vehicle trunk and attached to the "head" (dial, display, and handset) mounted near the driver seat.
	en.wikipedia.org /wiki/0G (275 words)

	Mobile Telephone Service - Wikipedia, the free encyclopedia
		The Mobile Telephone Service (MTS) is a pre-cellular VHF radio system that links to the PSTN.
		The channels are identified by pairs of letters taken from positions on a North American telephone dial that, when changed to digits, form (for 12-channel mobile sets) 55, 57, 95 and 97.
		The service territory of NorthwesTel has only eliminated four MTS locations during 2004, since cellular is available and the company had to rent tower space, making them even more unprofitable.
	en.wikipedia.org /wiki/Mobile_Telephone_Service (263 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		Mobile telephone service is not as advanced as Cellular, and not as efficient.
		Mobile telephone service limits the number of customers sharply, while Cellular is designed to solve the problems of Mobile telephone service.
		If the first digit of the called mobile unit is three, and a specific mobile unit 'listening' on the channel has a first digit of four, it stops listening to that channel, and moves to the next channel with 2000Hz applied.
	www.phrack.org /phrack/5/P05-09 (1243 words)

	[No title] (Site not responding. Last check: 2007-11-03)
		If there is a mismatch between the digits sent and the wired ID in the mobile, the mobile drops off and hunts for the idle channel.
		When the mobile phone is picked up it sends a connect tone of 1633 Hz for 400 ms to tell the base station it has answered.
		When a number is dialed from a mobile phone, 2150 Hz is sent continuously as soon a the dial goes off normal (when the dial is moved from its resting position).
	www.textfiles.com /phreak/CELLULAR/mobfone.txt (1596 words)

	Glossary of Mobile Media Terms (Site not responding. Last check: 2007-11-03)
		Costs of providing a service, for instance, may be so low that the party requesting the service sees them as de minimus and an invalid reason for not offering a service.
		The commercial form of mobile telephone service preceding cellular that allowed users to place and receive their own calls through the use of a dial or keypad on the telephone.
		Mobile communications authorizations are typically granted to private users, such as oil companies, or to common carriers, such as cellular and paging operators.
	www.ucla.cyberstuff.net /glossary_mobile_media.htm (9440 words)

	Mobile Phones The Basics : galaxyphones (Site not responding. Last check: 2007-11-03)
		This spectrum efficient method sharply contrasts with earlier mobile systems that used a high powered, centrally located transmitter, to communicate with high powered car mounted mobile phones on a small number of frequencies, channels which were then monopolized and not re-used over a wide area.
		IMTS or the Improved Mobile Telephone System (and its variants) is still around, serving isolated and rural areas not well covered by cellular.
		Cellular service may be in 90% of urban areas, but it only reaches 30% to 40% of the geographical area of America.
	www.galaxyphones.co.uk /mobile_phones_basics01.asp (1463 words)

	CHAPTER IV: THE CELLULAR TELEPHONE
		As users move about the service area, they are switched from one base station to another through a complex and sophisticated system known as "handoff." Handoffs are accomplished in a nearly instantaneous manner so that users are unaware that their mobile telephones changed frequencies and have been switched to another base station.
		However, the service was limited by a lack of communications channels (frequencies), and the systems were cumbersome to use, with "push to talk" features and manual connections via operator.
		Mobile radiotelephone services of the time, as well as private services such as dispatch systems, relied on a single high power transmitter for a large service area with a number of relatively high powered (by cellular standards) mobile units communicating with it over a set of one or more frequencies.
	www.sri.com /policy/csted/reports/sandt/techin2/chp4.html (15655 words)

	Local Service Scramble
		In fact the VHF and UHF allocations continue to be shared between rural radiotelephone service and one-way or two-way public land mobile service (the old Improved Mobile Telephone Service).
		The average cost for rural telephone service exceeds $3000 per household while the total cost for a urban or suburban wired local loop averages between $1200 and $1800.
		In the interest of providing telephone service to everyone (often referred to as "universal service") the government provides subsidies to rural telephone companies to keep the rates they charge their customers affordable.
	www.decodesystems.com /mt/97may (1658 words)

	galaxyphones - Mobile Phones - History (Site not responding. Last check: 2007-11-03)
		Land mobile or business communication systems serviced towing, taxi, and trucking services, where a dispatcher communicated to mobile phoness from a central base station.
		Improved Telephone Service worked full-duplex so people didn't have to press a button to talk.
		And other telephone companies existed in the country, any of whom could decide on their own which supplier they would buy from.
	galaxyphones.co.uk /mobile_phones_history07.asp (1349 words)

	Bay Springs Telephone Company, Inc. - About Us - History
		Over the years, Bay Springs Telephone Company consistently has sought to stay on the cutting edge of communications technology with one purpose in mind: to make it easier for our customers to share life with each other.
		That's why we were the first independent telephone company to install automatic dial equipment and use extensively buried cable.
		We were also the first telephone company-big or small-to offer IMTS (Improved Mobile Telephone Service).
	www3.bayspringstel.net /about/history.cfm (281 words)

	News in Context
		A telephone is an instrument that is designed for the simultaneous transmission and reception of the human voice.
		The general concepts involved in the invention of the telephone -- of speech sounds as a complex of vibrations in air that is transferrable to solid bodies and of the convertibility of those vibrations to electrical impulses in conducting metals -- had by then been understood for decades.
		Advances in electronics have improved the performance of the basic design, and they also have allowed the introduction of a number of "smart" features such as automatic redialing, call-number identification, and analog-to-digital conversion for transmission over digital circuits.
	www.britannicaindia.com /nicad_newtry.asp?tsearch=1778 (745 words)

	History of Mobile Communication
		In fact, most of these services were not directly part of the PSTN at all, and involved a radio channel patched into a phone line.
		In spite of the fact that mobile service was, indeed, a scarce luxury, the demand for service was rising rapidly.
		Responding to a spectacular and unexpected rising demand for wireless services, Congress, in the Omnibus Budget Reconciliation Act of 1993, mandated that the FCC reallocate portions of the electro-magnetic spectrum for "personal communication" and authorized the FCC to employ competitive bidding procedures in awarding licenses for the use of these new spectral resources.
	people.deas.harvard.edu /~jones/cscie129/nu_lectures/lecture7/cellular/cell_hist.html (903 words)

	Timeline of Telecommunications
		Louis undertaker, became upset on finding that the wife of a competitor was a telephone operator who made his line busy and transferred calls meant for him to her husband.
		Telephone service is suspended for one minute (6:25pm-6:26pm) on the entire telephone system in the United States and Canada during the funeral service (4 August).
		A new telephone service, DIAL-IT® allowed a caller to listen to the voice communications between the Space Shuttle Columbia and the ground command center.
	www.telephonetribute.com /timeline.html (10876 words)

	CEA
		In November 1963, Ma Bell introduced Touchtone service, which enabled calls to be switched digitally and, later, enabled all manner of automated menus and functionality that eliminated the need for human operators.
		Consumer telephone makers also adopted spread spectrum technology, resulting in cordless phones with 10 times the range of previous cordless models and eliminating most interference and potential eavesdropping.
		The first practical mobile radio-telephone service, MTS (Mobile Telephone Service) was begun in 1946 in St. Louis.
	www.ce.org /print/Press/CEA_Pubs/934.asp (2503 words)

	[No title]
		These are "radio common carrier" services in FCC eyes, rather than "private" services: a licensed provider of services rents out airtime to users who themselves are not individually licensed.
		However, since cell size is small and mobiles might drive out of range, the system monitors mobile strength using a "control channel" and, when necessary, performs "handoff" of the mobile to an adjacent cell.
		Like a trunked system, the mobile operating channel frequency is controlled by the cellular system, and changed during handoff; all this is invisible to the user (if all works properly).
	campus.murraystate.edu /academic/faculty/william.call/TSM342FM.doc (2036 words)

	Privateline.com Mobile Telephone History: IMTS
		The mobile units could weight 20 or 30 pounds and consume 30 or so amperes while in use.
		It was easy to tell when the mobile telephone was about to ring because the vehicle's headlights would dim.
		In most major cities, serviced was provided by the local Bell Telephone Company, and a few private companies, sometimes called radio common carriers (or RCCs).
	www.privateline.com /PCS/mobilephonepictures.htm (558 words)

	[No title]
		This will allow carriers who wish to provide paging service to obtain only one channel at one time, regardless of whether the channels are designated exclusively for one-way paging or for one-and two-way mobile operations.
		For applications proposing a two-way mobile telephone service, such as improved mobile telephone service (but not a two-way paging service), the Commission will allow applicants to obtain two channels at one time as proposed.
		The Commission emphasized that, in either case, the carriers must receive the authorizations, construct the stations, provide service to subscribers, and notify the FCC of the commencement of that service before seeking additional channels in that area.
	www.fcc.gov /Bureaus/Common_Carrier/News_Releases/1994/nrcc4051.txt (607 words)

	Wireless Terms Glossaries Dictionary - I (Site not responding. Last check: 2007-11-03)
		International Mobile Telecommunication 2000 (IMT-2000) is a group of technologies defined by ITU-T for the third generation mobile telephony.
		It can also be applied to mobile telephone standards that meet a number of requirements in terms of transmission speed and other factors.
		It is a 2G mobile telecommunications standard that uses CDMA, a multiple access scheme for digital radio, to send voice, data and signaling data (such as a dialed telephone number) between mobile telephones and cell sites.
	www.networkdictionary.com /wireless/i.php (1147 words)

	Telephone Company History
		The first telephone service in town was in a livery stable owned by Sam R. Kone.
		The first telephone directory was published in 1899 and was used as a model by area phone companies.
		Century Telephone Enterprises is the 16th largest local exchange telephone company in the United States.
	home.centurytel.net /ctcent/chome/history (735 words)

	History of mobile phones - radio telephones
		After the second world war, a few radio telephones were fitted into the cars of the rich and important in several countries.
		During the 1960's mobile telephone systems were available in parts of the UK (starting in Lancashire in 1959).
		This was a major step forward, but before wider use of mobile phones could be possible, some way of re-using frequencies had to be developed: this had been designed by Bell Laboratories in the USA in 1947, but was not fully implemented for another 20 years or so.
	www.mobileshop.org /history/radiophone.htm (408 words)

	Cellgroup - Introduction
		The first radiotelephone service was introduced in the US at the end of the 1940s, and was meant to connect mobile users in cars to the public fixed network.
		The systems were "cellular" because coverage areas were split into smaller areas or "cells", each of which is served by a low power transmitter and receiver.
		This first generation (1G) analog system for mobile communications saw two key improvements during the 1970s: the invention of the microprocessor and the digitization of the control link between the mobile phone and the cell site.
	www.dpo.uab.edu /~torjo/intro.html (300 words)

	Re: Why does a digital mobile phone signal affect digital hearing-aid users ?
		There are a number of mobile telephone standards currently in use throughout the world.
		AMPS was developed in 1979 and originated the concept of "cells" or distributed base stations that could hand off calls as handsets moved through a network.
		Many mobile phone owners have started using hands free sets due to health concerns, so they should be easy to find.
	www.madsci.org /posts/archives/nov99/941422586.Eg.r.html (699 words)

	Cell Phone Information
		Inter-continent telephone communications between the United States and England occurred in the mid 1930ï¿½s.
		The first car phone service that was introduced in 1949 was a mobile service, but the equipment was big and heavy.
		The phone was able to connect directly to the phone company, saving the caller the step of having to connect to the mobile phone service operator first.
	www.masteryskills.com /skills/cell-phone/where-did-those-cell-phones-come-from.html (659 words)

	Fundamentals of Telecommunications part 7 (Site not responding. Last check: 2007-11-03)
		The first commercially available radio and telephone system, known as improved mobile telephone service (IMTS), was put into service in 1946.
		As subscribers drove out of one cell and into another, their automobile radios, in conjunction with sophisticated electronic equipment at the cell sites (also known as base stations) and the telephone switching offices (also known as mobile telephone switching office [MTSO]), transferred from one frequency set to another with no audible pause.
		Additional frequency bands were allocated for their use, and rather than assign them to the first comers or by way of a lottery, the FCC auctioned them off through a sophisticated bidding contest that brought the U.S. treasury billions of dollars.
	www.airewav.com /edu_7.htm (964 words)

	Agilent \| Wireless \| Wireless Dictionary
		The service is accessed by a wireless packet network (PDC-P) and the contents are described in a subset of the HTML language.
		A term used by the International Telecommunication Union, a United Nations agency, to describe the third generation mobile telephony due to be ready in 2000.
		The service is based on 1 or more 64 kbps digital channels and does not use traditional modems.
	wireless.agilent.com /dictionary/i.html (610 words)

	"Mr. Watson. Come Here. I need you.": Bell and the Invention of the Telephone (Site not responding. Last check: 2007-11-03)
		Subscribers to different service providers could not call each other even if in they were in the same town.
		FM also has ability to "capture" or lock on to the stronger signal in the same band, and is more tolerant of mobile propagation problems like fast fading.
		Spectrum utilization was eventually improved by a factor of four, to 30 KHz, by the 1970s.
	bnrg.eecs.berkeley.edu /~randy/Courses/CS39C.S97/telephone/telephone.html (1409 words)

	Ritchie County Chamber of Commerce (Site not responding. Last check: 2007-11-03)
		The company, which was initially known as Armstrong County Line Construction, Inc., specialized in telephone and power line construction and acted as a contractor to local utility companies.
		In 1957, ARMSTRONG purchased the Ritchie Telephone Company of Harrisville, West Virginia.
		Today, ARMSTRONG owns, operates and maintains independent telephone companies in Rising Sun, Maryland; Addison, New York; Murdocksville and Duke Center, Pennsylvania and Hamlin and Harrisville, West Virginia.
	ritchiechamber.com /armstrong.html (141 words)

	HISTORY
		The following year, the first private telephone was installed in the home of Charles Williams of Somerville, Massachusetts.
		By the end of 1880, 47,900 telephones were in use in the United States.
		AMPS is the first standardized cellular service in the world.
	www.pcrevolver.com /history.php (792 words)

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