CALS 001 Lecture Notes - Lecture 8: Asymmetric Digital Subscriber Line, Digital Subscriber Line, Cable Modem
19 Apr 2018
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Document Summary
Broadband high speed internet access that is always on & faster than traditional dial up access. Digital subscriber line wireline transmission technology that transmits over traditional copper telephone lines that already are installed to homes/businesses. Asymmetric digital subscriber line used primarily by residential customers, faster speed in downstream direction, faster over the same line used to provide voice service. Symmetrical digital subscriber line used by businesses for video conferencing (needs bandwidth both up & downstream) Cable modem provide broadband using the same coaxial cables that deliver pictures/sound to your tv. Speed = 1. 5 mpbs or more // 2 connections = 1 to computer, 1 to wall. Fiber converts electrical signals carrying data into light. Wireless connects home/businesses to internet using radio link between customers location & providers facility. Satellite service can be disrupted in extreme weather, speed may be slower than dsl and cable modem. Bpl over existing low & medium voltage electric power.
