SDSL (Symmetric Digital Subscriber Line) is a high-speed Internet access, utilising the full bandwidth. ADSL (Asymmetric Digital Subscriber Line) first of all, leaves a space on the line for the telephone and fax machine, as well as uses it’s bulk for receiving data not sending. SDSL is equal and matches their upstream and downstream. It also uses the whole line, which will mean if you intend to install it, you will need a dedicated line for it. The SDSL requires a simple modem. Currently, it is being used in the European region. The other difference between ADSL and SDSL is the former has a 20:1 contention rate. This means that clients share their line with various other clients, which can go up to nineteen. As a result, the speed of the Internet, if all the clients were on, could drop dramatically. SDSL boasts a contention rate of only 10:01. This is because you can only share the line with nine others. Normally bandwidth is available for upload at less then 1 megabit per second, where as the SDSL can go up to 7 megabit per seconds, in both directions. This is great for companies that have web presence, VPN (Virtual Private Network), Extranet and Intranet. Having the ability to upload quickly is a huge bonus for businesses based in the web industry. Being able to upload websites, files and programs will increase productive time. ISP companies may offer different grades for varying prices, making it the ideal mode of Internet access for all types of companies. Ideally it was created for companies that are expanding and haven’t quite become large yet. Originally, the middle company had a problem as it was too large to use ADSL, but too large to move onto the big companies’ ground. SDSL is beginning to create hype in the industry in response to its promises, and so far it has delivered every one of them. ISP companies are slowly beginning to take it into consideration and offering it as part of their services. It is a more efficient method of accessing to the net, with huge advantages. For most, there is a 24-hour service line as well as a good service plan, making it possibly the best decision to make. The SDSL does require the same vendor equipment in the LAN or common DSL chipsets. This means that for ISP companies and businesses’ switching over it’s a breeze. Technology is improving with the times and it’s best to get on board as soon as possible. SDSL has been around since beginning of the year and the prospects are getting better by the day. About the Author Celeste writes for Star Internet Business, who specialise in ISP.