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Computer Network Articles
Page 23 of 122
CDMA2000
CDMA2000 is a code division multiple access (CDMA) version of IMT-2000 specifications developed by the International Telecommunication Union (ITU). It represents a family of 3G mobile communication standards that evolved from the earlier cdmaOne (IS-95) technology. CDMA2000 includes a group of standards optimized for different services: Voice Services − CDMA2000 1xRTT (Radio Transmission Technology), 1X Advanced Data Services − CDMA2000 1xEV-DO (Evolution-Data Optimized), 1xEV-DV (Evolution-Data and Voice) CDMA2000 Architecture Overview Mobile Device ...
Read MoreFourth Generation (4G) Mobile Phones
Fourth Generation (4G) mobile phones provide broadband cellular network services and represent the successor to 3G mobile networks. 4G delivers an all-IP based cellular communication system with capabilities that adhere to IMT-Advanced specifications established by the International Telecommunication Union (ITU). The transition to 4G marked a significant leap in mobile technology, moving from circuit-switched to packet-switched networks and enabling true mobile broadband experiences comparable to fixed broadband connections. Key Features All-IP packet switched network − Transmits voice, data, signals, and multimedia over a unified IP-based infrastructure. High-quality uninterrupted services − Aims to provide ...
Read MoreLong-term Evolution (LTE)
Long-Term Evolution (LTE) is a standard for wireless technology based upon GSM/EDGE and UMTS/HSPA technologies. It offers increased network capacity and speed to mobile device users, serving as an extension of 3G technology for high-speed mobile communications. LTE-Advanced (LTE-A) is an improvement over LTE that meets the criteria of 4G wireless communications as laid down by IMT-Advanced standards. It provides greater speeds and better quality of communications compared to standard LTE. Both LTE and LTE-A are used for mobile broadband communications and Voice over IP (VoIP) services, forming the backbone of modern mobile networks. ...
Read MoreVoice over LTE (VoLTE)
Voice over LTE (VoLTE) is a standard for delivering voice communication and data services over 4G LTE networks using an all-IP architecture. Unlike traditional voice calls that use circuit-switched networks, VoLTE transmits voice as data packets over the LTE data network. VoLTE leverages the IP Multimedia Subsystem (IMS) to provide high-quality voice, video, and messaging services. This technology enables faster call setup times, better voice quality, and the ability to use voice and data services simultaneously. How VoLTE Works VoLTE operates entirely on packet-switched technology, converting all voice communications into IP packets. When a user makes a ...
Read MoreCable Television
Cable television is a television delivery system that transmits programming to subscribers through coaxial or fiber optic cables. Unlike terrestrial television that uses radio waves transmitted through the air, or satellite television that relies on communication satellites, cable TV provides a direct wired connection from the service provider to the subscriber's premises. Cable television systems use a tree and branch network topology, where signals originate from a central headend facility and are distributed through a hierarchical network of cables to reach individual homes and businesses. Cable Television Network Architecture ...
Read MoreCommunity Antenna Television
Community Antenna Television (CATV), also known as Community Access Television, was originally developed to provide cable TV services to rural areas and hilly terrains where over-the-air broadcast signals were weak or unavailable. Subscribers pay a monthly subscription charge along with an initial installation fee to access these services. CATV systems work by using large community antennas positioned on hilltops or tall structures to receive strong broadcast signals from distant television stations and communication satellites. These signals are then distributed to homes and businesses through a network of coaxial cables. System Layout The CATV system comprises several key ...
Read MoreCable Internet
Cable Internet is a category of broadband Internet access that uses the infrastructure of cable TV networks to provide Internet services. Cable Internet provides connectivity from the Internet service provider (ISP) to end users in a similar manner as digital subscriber line (DSL) and fiber-to-the-home (FTTH). System Layout Broadband cable Internet access uses a cable modem termination system (CMTS) at a cable operator facility called a headend. The headend is connected to switching centers by high-bandwidth fiber trunk lines. Each switching center connects to one or more fiber nodes through fiber optic cables. Finally, local coaxial cables connect ...
Read MoreCable Modems
A cable modem is a hardware device that connects a computer to an Internet Service Provider (ISP) through the local cable TV infrastructure. It serves as a bridge between your home network and the cable company's broadband network, enabling high-speed internet access over coaxial cables. Cable modems have two interfaces: one connects to the cable TV network outlet, and the other connects to a computer, router, or other network device through Ethernet or USB. Cable Modem Connection Overview Cable TV Network ...
Read MoreCable Modem Termination System (CMTS)
A Cable Modem Termination System (CMTS) is a hardware device located at the headend of a cable TV network that connects cable subscribers to their Internet Service Provider (ISP). It enables high-speed data services like Internet access and Voice over Internet Protocol (VoIP) over the existing cable TV infrastructure. CMTS in Cable Network Architecture CMTS Headend HFC Network CM CM CM Internet/ISP ...
Read MoreData Over Cable Service Interface Specification (DOCSIS)
Data Over Cable Service Interface Specification (DOCSIS) is an international telecommunications standard that enables high-speed data transmission over existing cable TV infrastructure using Hybrid Fiber-Coaxial (HFC) networks. DOCSIS allows cable operators to provide broadband Internet access and support high-definition television services through the same coaxial cables used for traditional cable TV. DOCSIS transforms cable TV networks into bidirectional data communication systems, enabling millions of homes to access high-speed Internet without requiring new infrastructure deployment. DOCSIS Cable Network Architecture CMTS (Head-end) ...
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