U-verse

U-verse

AT&T U-verse is the brand name for a group of services provided over Internet Protocol (IP), including television service, Internet access, and voice telephone service.

hort description

Unlike traditional offerings from U.S. cable companies, video is delivered over IP from the head end to the consumer's set-top box. U-verse uses H.264 (MPEG-4 AVC) encoding which compresses video more efficiently than the traditional MPEG-2. Broadcast channels are distributed via IP multicast, allowing a single stream (channel) to be sent to any number of recipients. The system is also designed for individual unicasts for video on demand, central time shifting, start over services and other programs desired by only one home at that particular time. The set-top box does not have a conventional tuner, but is an IP multicast client which joins the IP multicast group corresponding to the stream ("channel") desired. In the IP multicast model, only the streams the customer uses are sent. The customer's connection need not have the capacity to carry all available channels simultaneously.

The customer's premises are served primarily by VDSL from large fiber fed neighborhood boxes, known as VRADs. In newer developments, U-verse may also be deployed over FTTP. The network was designed for speeds of 20-25 megabits down, 1 to 3 megabits up, with the majority of the bandwidth devoted to the TV programming. These speeds are generally reliable within convert|3000|ft|sigfig=1 from the neighborhood gateway, though AT&T has announced they will bond two pairs of wires to extend those speeds to convert|5000|ft.Fact|date=July 2008 Homes closer than that can receive higher speeds downstream, possibly 40-50 megabits up to convert|1500|ft|sigfig=1.Fact|date=July 2008 AT&T has local facilities (cross connects) within convert|5000|to|6000|ft of most homes, some of which already are fed by fiber.Fact|date=July 2008 Inside the customer's home the new services are carried over Ethernet or a HomePNA home CATV network.

Voice over IP

In some areas, AT&T offers a VoIP service which they call "AT&T U-verse Voice". It is available in two package options:

* AT&T U-verse Voice 1000
* AT&T U-verse Voice Unlimited

U-verse Voice provides calling within the U.S. and to Canada, Puerto Rico, the U.S. Virgin Islands, Guam, and the Northern Marianas. U-verse Voice 1000 provides 1000 minutes and 7¢ per minute thereafter. U-verse Voice Unlimited provides unlimited minutes.

History

In June 2004, AT&T announced Project Lightspeed. Alcatel-Lucent was named as the Systems Integrator for Project Lightspeed. AT&T originally planned to reach nearly 18 million homes by the end of 2007, [ [http://www.newtelephony.com/news/51h10115138.html SBC Gives Customers U-verse ] ] a target not likely to be met until early 2009. U-verse will also be available to a limited number of homes in the old BellSouth region. AT&T has not announced whether they would offer faster 50-100 megabit symmetric service to the 1.5M homes announced by BellSouth before the purchase. [ [http://telephonyonline.com/fttp/technology/bellsouth_vdsl2_upgrade_091406/ VON: BellSouth plans major VDSL2 upgrade ] ] BellSouth had already invested in fiber to the curb, so the higher speeds would require little additional investment. Some parts of San Antonio, Texas offered SD TV commercial service in June 2006 with 30 HD channels available to some in December, although limited to a single channel per household. AT&T has announced they will offer two HD channels to a home, which will allow watching one channel while recording a second. As of the end of July 2008 many U-Verse customers finally have the two HD channel offering. The standard definition packages currently offer as many as 400 channels. Pricing varies widely, with "special offers" changing rapidly. The channel lineup and pricing of AT&T U-verse is similar to most cable and satellite systems. There may, of course, be differences between a local cable provider and the AT&T U-verse selection. For a listing in a specific area, consult the [https://uverse1.att.com/un/loadSelectOfferAction.do?From_UMA_Iframe=True&UMA_Launch_Url=/uma/RetrieveGeneralContent?CONTENTID=201&APPID=AMSS&FORMAT=IFRAME U-verse channel lineup] . Voice over IP is available in only some U-Verse areas in July, 2008.

References

External links

* [https://uverse.att.com AT&T U-verse]


Wikimedia Foundation. 2010.

Игры ⚽ Нужно сделать НИР?

Look at other dictionaries:

  • verse — [ vɛrs ] n. f. • 1680; à la verse 1640; de verser 1 ♦ Loc. adv. À VERSE, se dit de la pluie qui tombe en abondance. Il pleuvait à verse. ⇒ averse. « La pluie tombait à verse [...] mais, bravant le mauvais temps, un peuple immense s acheminait »… …   Encyclopédie Universelle

  • versé — verse [ vɛrs ] n. f. • 1680; à la verse 1640; de verser 1 ♦ Loc. adv. À VERSE, se dit de la pluie qui tombe en abondance. Il pleuvait à verse. ⇒ averse. « La pluie tombait à verse [...] mais, bravant le mauvais temps, un peuple immense s… …   Encyclopédie Universelle

  • Verse drama and dramatic verse — Verse drama is any drama written as verse to be spoken; another possible general term is poetic drama. For a very long period, verse drama was the dominant form of drama in Europe (and was also important in non European cultures). Greek tragedy… …   Wikipedia

  • Verse-chorus form — is a musical form common in popular music and predominant in rock since the 1960s. In contrast to AABA (thirty two bar) form, which is focused on the verse (contrasted and prepared by the bridge), in verse chorus form the chorus is highlighted… …   Wikipedia

  • Verse (protocolo) — Verse es un protocolo de red que permite comunicación en tiempo real entre los softwares gráficos. Por ejemplo, varios arquitectos pueden construir una casa en un mismo entorno virtual utilizando su propia computadora, incluso si están utilizando …   Wikipedia Español

  • Verse — Verse, n. [OE. vers, AS. fers, L. versus a line in writing, and, in poetry, a verse, from vertere, versum, to turn, to turn round; akin to E. worth to become: cf. F. vers. See {Worth} to become, and cf. {Advertise}, {Averse}, {Controversy},… …   The Collaborative International Dictionary of English

  • verse — 1. (vèr s ) s. f. 1°   Terme d agriculture. État des céréales couchées à terre par la pluie ou toute autre cause. La verse des blés. 2°   Terme d eaux et forêts. Grande corbeille de charbon, qui en contient 35 livres. 3°   À verse, loc. adv. Se… …   Dictionnaire de la Langue Française d'Émile Littré

  • Verse protocol — Verse is a networking protocol allowing real time communication between computer graphics software. For example, several architects can build a house in the same virtual environment using their own computers, even if they are using different… …   Wikipedia

  • Verse — Die Verse am Bremecker Hammer in LüdenscheidVorlage:Infobox Fluss/KARTE fehlt …   Deutsch Wikipedia

  • versé — versé, ée (vèr sé, sée) part. passé de verser. 1°   Qui a coulé hors de ce qui le contenait. Vin versé. Sang versé.    Fig. •   Les grâces, les honneurs par moi seule versés, RAC. Brit. III, 4. 2°   Renversé. Voiture versée. Blés versés. Foin… …   Dictionnaire de la Langue Française d'Émile Littré

  • verse — [və:s US və:rs] n [Date: 900 1000; : Old French; Origin: vers, from Latin versus turning, verse , from vertere to turn ] 1.) a set of lines that forms one part of a song, poem, or a book such as the Bible or the Koran ▪ Let s sing the last verse… …   Dictionary of contemporary English

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”