1. Glass Fibre
... that for ADSL the delivery method is over an analogue line, whereas for cable the delivery is over a digital line. Therefore when cable companies offer telephone services they have to convert digital to analogue. For cable Internet to work, TV channel space is used for data transmission, with certain channels used for downstream transmission and other channels for upstream transmission. As ... the traditional switches are electrical while the signals in glass fibre are optical, which calls for the need to use opto-electrical transducers on either side of the switch to convert the signal...
- Word Count: 4544
- Approx Pages: 18
- Grade Level: High School