Certainly, let's dive into the history and technology of cable television and cable-based internet access:
Evolution from Wireless to Cable Television:
- In the early days, television broadcasts were wireless, sent from large towers and received by antennas in homes.
- Cable television emerged in the late 1940s to serve remote towns and rural areas where TV towers were impractical.
- Cable TV expanded slowly, but in 1984, the Cable Communications Policy Act deregulated the industry, leading to massive growth worldwide.
Cable TV to Cable Internet:
- Cable TV infrastructure expanded significantly by the early 1990s, similar in scale to the public telephone system.
- Cable companies recognized the potential to utilize the coaxial cables used for TV delivery to transmit data for internet access.
- Cable-based internet access uses frequencies that don't interfere with television broadcasts.
Cable Broadband Technology:
- Cable broadband technology leverages the same cables used for TV transmission to deliver high-speed internet access.
- Cable internet is a shared bandwidth technology, meaning multiple users share a certain amount of bandwidth until reaching the ISP's core network.
- The shared bandwidth model allows many users to access the internet over the same cables.
Shared Bandwidth vs. Point-to-Point:
- Cable broadband is different from technologies like DSL and dial-up that offer point-to-point connections.
- Point-to-point connections connect directly to a central office (CO), ensuring a guaranteed amount of bandwidth.
- Cable connections share bandwidth until reaching the ISP's core network, potentially leading to slowdowns during peak usage.
Cable Modem and CMTS:
- Cable internet connections are managed by a device called a cable modem.
- The cable modem connects the consumer's network to the Cable Modem Termination System (CMTS).