Page 199 - CITS - Electronic Mechanic - TT - 2024
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ELECTRONICS MECHANIC - CITS
Live TV Recording
Lately, set-top boxes have started allowing users to record live TV broadcast on an attached hard disk drive. The
feature instantly gained popularity and has become a standard feature in most set-top boxes. Users can playback
the recorded broadcast, delete and overwrite previous recordings with ease.
Universal Remote Controls
Many set-top box manufacturers provide remote controls that not only support controlling the provided box,
but they are also compatible with many televisions from various brands and models. Such remote controls are
commonly referred to as universal remotes. They can control most of the basic functions of your TV along with
controlling your set-top box, thereby adding convenience and ease of use.
Parental Locks
Some set-top boxes allow users above 18 years of age to set up parental locks. Simply put, parents can put up
filters on certain type of channels that are not appropriate for children. They can choose to block some or all of the
channels listed in a particular category or block multiple channels listed across different categories.
Cable Modem Termination Systems (CMTS):
Cable modem termination system (CMTS) is a hardware device at the headend of a cable TV network that is used
to connect cable subscribers to the Internet Service Provider (ISP). They provide high speed data services like
Internet or Voice over Internet Protocol (VoIP) over the cable TV network.
Functions
CMTS has both radio frequency interfaces and Ethernet interfaces.
It transmits and receives user data packets to and from the cable modem attached to the subscriber through HFC
network. It then converts them to Internet Protocol packets (IP packets) and routes them to the concerned Internet
Service Provider (ISP).
Cable modems cannot directly communicate among themselves. So, all data communications should be done
via CMTS.
CMTSs can act as a bridge or a router in the network.
CMTSs can serve different population sizes of cable modems.
The quality of service provided by a CMTS to the cable modems is independent of their distances.
They provide authorization to users.
They can also provide basic filtering against threats and attacks.
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CITS : E & H - Electronics Mechanic - Lesson 108 - 117