DSL and Cable Modems Broadband Communication Technology Murdoch, Tyler Nguyen, Hien Piltzer, Gabriel

Brief History DSL Joseph Lechleider, developed ADSL (Asymmetry Digital Subscriber Line). John Cioffi, DMT (discrete multi-tone). Cable higher capacity hybrid networks of coaxial and fiber optic built. Cable internet service offered in mid 90s. Early disappointments over DSL reliability, security of cable internet, and broadband accessibility have largely been addressed. DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison

DSL Types All types of DSL service fall into one of two basic categories: Symmetric Asymmetric - SDSL -ADSL - SHDSL -RADSL - HDSL -VDSL Speed dependent on distance and signal frequency DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison

DSL Advantages / Disadvantages Pros High-speed download (up to 5 Mbps) Business – Level DSL service offers guaranteed data rates. Lets you surf the Net and gab on the same line at the same time Cons Not every phone line will work; no easy way to find out if yours does. Speed drops as you get further from phone company central office. Not as widely available as Cable DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison

DSL Security DSL has a slight advantage over Cable when it comes to security DSL in a given neighborhood do not appear as nodes on a LAN DSL uses dedicated rather than shared cabling. DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison

DSL Cost Less Expensive DSL has more variance between service package and price. DSL is said to be cheaper than Cable by up to 50%. Price Range DSL likes to keep its price constant, high $20s, low $30s. Qwest DSL Residential$27/month - 256Kbps up/down $37/month – 7Mbps Down 896Kbps Up DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison

Cable Advantages / Disadvantages DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison Pros Speeds are not dependent on distance from central offices. Faster maximum speeds (8Mbps+) than DSL Sometimes cheaper than DSL, especially when bundled with TV services Cons May require professional installation. Line shared with others in neighborhood; speeds may vary May place limits on data downloads and uploads.

Cable Security DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison Uses a shared cable line to provide service to an entire neighborhood DOCSIS (Data Over Cable Service Interface Specification)

Cable Cost DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Advantages Disadvantages Security Cost Conclusion Comparison Much more expensive than DSL. Cheaper if purchased bundled with other services: Television Voice phone Comcast Promotional Pricing - $20/month for 6 months $43/month after promotion period 6Mbps down

Comparison DSL and Cable Modems History DSL Types Advantages Disadvantages Security Cost Cable Types Advantages Disadvantages Security Cost Conclusion Comparison Both Cable and DSL use broadband communication technology DSL uses direct connection while cable uses shared connection Both Cable and DSL service providers put speed cap over to residential services Both Cable and DSL high speed internet connection are not available everywhere Typically Cable is faster then DSL and costs more than DSL

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