[permalink] [id link]
D-AMPS was a digital, 2G standard used mainly by AT & T Mobility and U. S. Cellular in the United States, Rogers Wireless in Canada, Telcel in Mexico, Telecom Italia Mobile ( TIM ) in Brazil, VimpelCom in Russia, Movilnet in Venezuela, and Cellcom in Israel.
from
Wikipedia
Some Related Sentences
D-AMPS and was
All Alltel AMPS and D-AMPS service was discontinued in September 2008
* AT & T Mobility-In areas where AT & T Mobility previously had D-AMPS operating on 1900 MHz frequencies, no analog AMPS network existed, and the D-AMPS network on the 1900 MHz frequency was shut down in mid-2007.
Service on the remaining 850 MHz AMPS markets was discontinued along with 850 MHz D-AMPS service on February 18, 2008, except in areas where service was provided by Dobson Communications.
This frequency band was designated by the United States FCC and Industry Canada to be used for new wireless services to alleviate capacity caps inherent in the original AMPS and D-AMPS cellular networks in the 800-894 MHz frequency band ( commonly referred to as the " 850 MHz band ").
Telecom originally operated a TDMA ( AMPS, Digital D-AMPS / TDMA ) mobile network ; this was superseded by its CDMA network.
It was also proposed, at one stage, to support packet radio services in the US D-AMPS TDMA system, however, in practice, all of these networks have been converted to GSM so this option has become irrelevant.
VimpelCom was founded in 1992 and initially operated AMPS / D-AMPS network in Moscow area.
Houston Cellular was a Houston-based cell phone company which provided AMPS and D-AMPS ( TDMA ) service in the Greater Houston area.
This purchase of frequencies was used to directly compete in the Houston market with D-AMPS ( TDMA ) service.
The first mobile telephone system was Cubacel, using AMPS and later D-AMPS.
D-AMPS and digital
In most areas, D-AMPS is no longer offered and has been replaced by more advanced digital wireless networks.
D-AMPS uses existing AMPS channels and allows for smooth transition between digital and analog systems in the same area.
It is a digital extension of AMPS and so it is also quite widely known as Digital AMPS ( D-AMPS ).
Other digital mobile technologies, such as CDMA2000 and D-AMPS, use lower output power, typically below 1 watt.
D-AMPS and 2G
IS-54 and IS-136 are second-generation ( 2G ) mobile phone systems, known as Digital AMPS ( D-AMPS ).
Variations of this codec have been used in several 2G cellular telephony standards, including IS-54, IS-136 ( D-AMPS ), GSM ( Half Rate speech ) and iDEN.
D-AMPS and standard
There are some phones capable of supporting AMPS, D-AMPS and GSM all in one phone ( using the GAIT standard ).
But sometimes D-AMPS and USDC also refers to the other prominent interim standard IS-136.
D-AMPS and used
The most widely used of these technologies is called Digital AMPS, or D-AMPS.
* BellSouth Mobility used D-AMPS as opposed to Sprint and Verizon's IS-95 technology.
D-AMPS and mainly
Telecommunications in Cuba consists mainly of NTSC analog television, analog radio, telephony, AMPS, D-AMPS, and GSM mobile telephony, and the Internet.
D-AMPS and by
D-AMPS is considered end-of-life, and existing networks have mostly been replaced by GSM / GPRS or CDMA2000 technologies.
However, D-AMPS has been competing against GSM and systems based on code division multiple access ( CDMA ) for adoption by the network carriers, although it is now being phased out in favor of GSM / GPRS and CDMA2000 technology.
It ran AMPS and D-AMPS across most of the territory covered by the BellSouth landline company.
D-AMPS and .
AMPS and D-AMPS have now been phased out in favor of either CDMA2000 or GSM which allow for higher capacity data transfers for services such as WAP, Multimedia Messaging System ( MMS ), and wireless Internet access.
GSM, D-AMPS, PDC, iDEN, and PHS are examples of TDMA cellular systems.
* D-AMPS: Digital Advanced Mobile Phone Service, an upgraded version of AMPS, is being phased out due to advancement in technology.
* 31 March: The 025 D-AMPS cellular network is closed down.
An AMPS / IS-54 infrastructure can support use of either analog AMPS phones or D-AMPS phones.
Like D-AMPS and GSM, PDC uses TDMA.
D-AMPS and Telcel
Telcel has entered into approximately 385 such agreements covering GSM and TDMA D-AMPS networks around the world.
was and digital
The song " The Raven " featured lead vocals by the actor Leonard Whiting, and, according to the 2007 remastered album liner notes, was the first rock song to use a digital vocoder, with Alan Parsons speaking lyrics through it.
The Atanasoff – Berry Computer ( ABC ) was the first electronic digital computing device.
At that time, the ENIAC was considered to be the first computer in the modern sense, but in 1973 a U. S. District Court invalidated the ENIAC patent and concluded that the ENIAC inventors had derived the subject matter of the electronic digital computer from Atanasoff ( see Patent dispute ).
George W. Snedecor, the head of Iowa State's Statistics Department, was very likely the first user of an electronic digital computer to solve real world mathematics problems.
Historically, before the advent of widespread digital technology, ASP was the only method by which to manipulate a signal.
At the time of the design of ATM, 155 Mbit / s Synchronous Digital Hierarchy ( SDH ) with 135 Mbit / s payload was considered a fast optical network link, and many Plesiochronous Digital Hierarchy ( PDH ) links in the digital network were considerably slower, ranging from 1. 544 to 45 Mbit / s in the USA, and 2 to 34 Mbit / s in Europe.
It had simple digital joysticks and was almost fully backward-compatible with the Atari 2600, the first console to have backward compatibility without the use of additional modules.
When a cartridge was inserted into the system, the 7800 BIOS included code which would generate a digital signature of the cartridge ROM and compare it to the signature stored on the cartridge.
The digital signature long prevented homebrew games from being developed until the original encryption generating software was discovered.
When the original digital signature generating software was turned over to the Atari community, development of new Atari 7800 titles began.
The encoding of text by bits was also used in Morse code ( 1844 ) and early digital communications machines such as teletypes and stock ticker machines ( 1870 ).
The second revision, published in 1837, was the first digital ( binary ) form of writing.
BBC Text originally launched on digital terrestrial services in 1999, and was later introduced on satellite and cable platforms.
A digital text service had been available since the launch of digital terrestrial television in November 1998, but the BBC Text service was not publicly launched until November 1999, due to a lack of availability of compatible set-top boxes.
Although the experimental service was publicly available, there were no digital set-top boxes or receivers available on the market which could decode the signal and the service was only presented to the public via BBC demonstrations using prototype receivers.
The BBCi brand launched in 2001 and was conceived as a cohesive multi-platform brand name for all the BBC's digital interactive services, encompassing the corporation's digital teletext, interactive television and website services.
The News Multiscreen was removed from the digital service in October 2009, to make room for future Freeview HD broadcasts.
This coverage was improved in 1998 with the advent of digital television in the United Kingdom allowing satellite and digital terrestrial television viewers to also view the service.
Initially it was difficult to obtain a digital satellite or terrestrial receiver without a subscription to Sky or ONdigital respectively, but now the channel forms an important part of the Freeview package of channels.
BeOS was built for digital media work and was written to take advantage of modern hardware facilities such as symmetric multiprocessing by utilizing modular I / O bandwidth, pervasive multithreading, preemptive multitasking and a 64-bit journaling file system known as BFS.
0.390 seconds.