SDSL - A replacement for leased lines and private circuits?
SDSL stands for Synchronous Digital Subscriber Line which means simply that it offers upload speeds at the same high rate as downloads, unlike ADSL which has a reduced upload speed.
For most companies a slower upload speed (although still four times faster than ISDN) is not a problem, however there are some companies for whom a higher upload speed is vital. Customers such as printers and design houses who need to send proofs to customers before going to print, or companies hosting web and email servers at their own offices are the most likely to benefit from SDSL.
So does this replace the need for a Leased Line or Private Circuit?
This question can't be answered with a simple yes or no, because it depends on the end user's requirements.
A leased line (L/L) or private circuit (P/C) provides a guaranteed amount of bandwidth i.e. it is contention free. SDSL, like its ADSL counterpart is not free of such restrictions, and actually has a contention ratio of 10:1.
SDSL is generally speaking much cheaper than a leased line alternative, and has a much lower installation costs.
Are there any disadvantages to SDSL?
The main problem is related to availability. At present, less than 10% of the UK telephone exchanges have been SDSL enabled, so before going too far down this avenue, we would recommend speaking to one of our advisers to check that you can get SDSL in your area.
Finally, unlike ADSL which can co-exist with a phone, SDSL requires its own dedicated phone line.
- Synchronous upload and download speeds of up to 2Mbps
- No contention ratio applied within the Exa Network.
- Free IP addressing on request, subject to justification.
- No port blocking.
- Virus scanning on all incoming emails and attachments
- Technical support from real people (no autoresponders) who understand our products and are here to help via a local call rate number or email.
- Free consultation and advice prior to ordering SDSL, to make sure you get the right product and service.
- Twelve month contract, followed by monthly contract. No long term tie in.
- No hidden costs or fees.
