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Welcome to the world's only real-time business DSL (ADSL) quote tool! Use our free service to perform unbiased price research to find the best service at the best possible price. Once you select a plan that interests you, a member of our sales team will contact you to discuss the details of your quote, confirm pricing, and assist you with the signup process. You can also call our toll free help line at 800-880-2001 (Ref. Number: 7557) for live assistance.
About Our Company

Who We Are
4-DSL.com, partnered with both the GeoQuote™ & DirectGlobal™ Networks, is committed to providing you with quality professional DSL services throughout the United States. Our 'real-time' quote services, provided thru GeoQuote, are the best and in the business. We offer pricing and availability to your location within seconds not days.

What We Do
When it comes to Internet access services, the DirectGlobal™ Network offers internet services to most areas within the U.S. and U.K., as well as other areas of the globe providing multi-meg circuits, business ADSL & leased lines with the UK & business broadband satellite access.

Both DirectGlobal™ and GeoQuote™ provide high speed business services such as T1, DS3, OC-3 -OC-48 circuits, VoIP ...

For information on U.K. business services, please call 1.800.936.2135 x6 or +44 (0)84 5280 1757

For more on our U.S. business services, please call us toll free at 1.866.436.7868 (be sure to mention reference #7557)

Where We're Going
Our T1 experts continue in their commitment to bring to the best T1 pricing tools available. A team of programmers remains in constant contact with our T1 providers to update rates, coverage area, and specials/promotions. You can rest assured that we will be here for you during all phases of service, from the decision making process, the application and credit approval process, the installation process, all the way through to the end of your contract and eventual renewal of your service. We are committed to you in every aspect of the customer relationship.

If you need to contact us for any reason, please, don't hesitate to call or email us at your earliest convenience. We will do all in our capacity to respond to your inquiry immediately.

By Phone: (866) 436-7868 x7557

By Email: Go to our Contact Page

DirectGlobal, Direct Global

 

DirectGlobal.net & ShopForInternet.com

UK Leased Lines For ADSL in the UK visit www.Shop4DSL.co.uk





 High-Speed DSL

Written by: DirectGlobal Communications - Aug 19, 2008

At the customer premises, a DSL router or modem connects the DSL line to a local-area network (LAN) or an individual computer. The modem also organizes the aggregate data stream created by multiplexing downstream channels, duplex channels, and maintenance channels together into blocks, and attaches an error correction code to each block. The receiver then corrects errors that occur during transmission up to the limits implied by the code and the block length. The unit may, at the user's option, also create superblocks by interweaving data within sub-blocks; this allows the receiver to correct any combination of errors within a specific span of bits. This allows for effective transmission of both data and video signals alike.

To create multiple channels, DSL modems divide the available bandwidth of a telephone line in one of two ways -- Frequency Division Multiplexing (FDM) or Echo Cancellation. FDM assigns one band for upstream data and another band for downstream data. The downstream path is then divided by time division multiplexing into one or more high-speed channels and one or more low speed channels. The upstream path is also multiplexed into corresponding low speed channels. Echo Cancellation assigns the upstream band to over-lap the downstream, and separates the two by means of local echo cancellation, a technique well know in V.32 and V.34 modems. With either technique, DSL splits off a 4 kHz region for POTS at the DC end of the band.

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