‘Leased line broadband’ is an oxymoron. Leased lines are dedicated. Broadband is not. It’s contended. Leased lines speeds are symmetric. Broadband speeds are asymmetric. Leased lines are more reliable than Broadband and comes with far better SLAs. But all these benefits do come at a cost: a higher monthly charge
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The A in ADSL stands for Asymmetric. Leased lines are symmetric. So are ‘ADSL Leased lines’ possible? The answer is yes. There’s a variant of ADSL called ADSL2+Annex M which offershigher upload speeds than standard ADSL and standard ADSL2+. It’s theoretically possible to create a leased line by using this asymmetric connection, using rate-shaping to
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There are a number of leased line backup options to choose from. Contended ADSL The most popular choice for a backup connection. If your leased line goes down, you’ll still be able to access the Internet. Your upstream speed will probably be reduced, as will the quality of your connection. It’s not ideal, but frankly
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There are a number of leased line alternatives: Contended SDSL You’re probably familiar with ADSL (Asymmetric Digital Subscriber Line). Well, there’s a symmetric version of it called SDSL. It’s only available in a fraction of the UK. For example BT Wholesale offer SDSL connections to ISPs, but only to premises served by 600 of the
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Here’s how leased lines compare to other options: SDSL Cable leased lines are available at higher speeds. They’re also available in a wider area. Only 600 of the 5600 UK telephone exchanges have been SDSL-enabled by BT’s Wholesale Division. It’s worth noting that SDSL comes in two flavours: contended and uncontended. Contended connections share bandwidth
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There are several types of leased lines. Fibre Leased Lines Fibre Leased Lines provide a dedicated symmetric data connection by sending light over fibre optic cables. In reality, almost all leased lines use fibre for a major portion of route, particular the ‘backhaul’ element. However some leased lines use fibre all the way. If you’ve
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