Technology in the telecommunications sector is growing very fast, where we are required to be able to create new innovations from technologies that have been there before, so beneficial to the parties concerned. No one knows if we more clearly the technology that has no reference to knowledge development. One of the existing technology and network technology available is HFC (Hybrid Fiber Coax). Hybrid Fiber Coax or commonly referred to as HFC is an alternative type of access network technology that is, the Full Service Access Network using physical media (wireline), while also exist Cooper and Full Hybrid Fiber Fiber. Full Service Access Network is a network access that can deliver voice-based services (voice), data and video through an equal access network platforms. While the access network itself, is defined as tissue that connects the Service Network Interface (SNI) with User Network Interface (UNI).
Access network applications can be viewed on the Public Switched Telephone Network (PSTN) that provides telephone service, where network access is a relationship between the telephone exchange by telephone. In addition to the access network, there is also a transport network, the network that connects the Service Network Interface (SNI) of one another. Can be analogous to the relationship between the PSTN telephone exchange with one another. Definition of HFC Networks HFC network is a network technology evolution Cable TV (CATV)-based coaxial cable as transmission media for the application of Broadcast TV services. Demands the need for technology, especially the features desired services are increasing rapidly, then the development of access network is then added service Video on Demand (VoD), data, telephone, and broadcast their own TV services in the HFC network service applications. Hybrid Fiber Coax is one of the access network technology that formed on the basis of a combination of optical and coaxial networks. Initially, HFC technology is widely used by cable TV operators to deliver broadcast TV service via cable. However, as the development era, HFC technology is more developed in its service features at once, which is itself a cable TV, telephone, Internet, and Video on Demand. These features allow delivered at once using the HFC network, which has the ability to provide large bandwidth and high speed data transmission.
Needs more interactive multimedia is one important aspect of supporting the development of HFC network. HFC network infrastructure originally dirnacang for direct services, infrastructure optimized to a two-way broadband services, making services HFCs as an economical alternative service between several planning platform that broadband access networks, such as ASDL and SDV. Excellence is combining the benefits of HFC network bandwidth optical fiber is very wide, and the shared nature of the coaxial cable. While the advantages of optical fiber itself is, on the use of major network TV cable is to reduce noise caused by the dikaskade amplifier, resulting in signal quality coaxial cable network of well maintained. In addition, excess optical fiber is to increase reliability in the planning of the cable. Transmission system used in the HFC network is an analog transmission using the method of Sub Carrier Multiplexing (SCM), where all the signal information for Broadcast TV services, VoD, data, and phone first modulated RF signal, and RF signals are converted into optical signals and transmitted using fiber optic transmission medium to the fiber node. At the fiber node, the optical signal converted back into RF signals and distributed to customers' homes using coaxial cable. At the customer's home, the RF signal and then converted back into the original information signal by the subscriber terminal corresponding to each service. Components - the composition of HFC network • Mater headend, as the central information service of the HFC network, where signals from various sources (such as satellite signals, the signals off air) is received and converted to a form of RF signal transmission. • Distribution Hub, an access network of distribution centers to customers' homes. Can be analogous to the STO on the PSTN. • Fiber Node, consisting of optoelectronic and power Inserter, serves to convert optical signals into electrical signals, then distributed to the coaxial network or vice versa. • Express Amplifier, as the reinforcement signal level dropped due to transmit on the cable attenuation express that aims to broaden the reach of fiber service node. • Feeder Amplifier, as the amplifier in a coaxial cable network that led to the customer. • Tap, is a combination of splitters and directional couplers, as a passive component to branch a signal from coaxial cable to homes of customers effectively. • Splitter, is a passive component that is used to divide an input signal into two output cable with the same major. HFC Network Segmentation The segmentation on the HFC network, can be grouped into 4 segments with different functions, namely: • Segment 1 Optical Transport Link or optical transport network, or known by the network of trunk, namely the relationship between the headend to the distribution hub, either the transmission of analog and digital transmission. • Segment 2 Optical Distribution Link (Fiber Distribution Network), for connecting between the distribution hub with optical fiber nodes using analog technology. • Segment 3 Coaxial Distribution Link (coaxial Distribution Network), to distribute RF signals that carry HFC network services from the fiber node to the customer locations, or vice versa. This coaxial distribution network to form the structure of tree and branch network, consisting of network components. • Segment 4 Drop customers, is the last link between passive feeder systems, which tap into your home or Ciu. HFC Service Application Many ways can be done to classify the types of applications HFC services, among others are: • Video Service Among them are off air TV, Pay per View, Pay-per-Channel, Video on Demand, Games on Demand, Music on Demand. • Data services, among others are: o Portal services o e-commerce o telemedicine o telelearning o VoIP o Video conferencing o Video streaming o Audio streaming • Voice Service, in the form of phone service with cable packet technique to the standard of quality, NCS, MGCP and PSTN. However, the design of its own HFC network, needs the support of all existing infrastructure, such as data collection, both internally and externally, and then also necessary technical requirements, and most importantly the existence of professional experts in their fields in order to run the planning, with ripe with success as expected
Access network applications can be viewed on the Public Switched Telephone Network (PSTN) that provides telephone service, where network access is a relationship between the telephone exchange by telephone. In addition to the access network, there is also a transport network, the network that connects the Service Network Interface (SNI) of one another. Can be analogous to the relationship between the PSTN telephone exchange with one another. Definition of HFC Networks HFC network is a network technology evolution Cable TV (CATV)-based coaxial cable as transmission media for the application of Broadcast TV services. Demands the need for technology, especially the features desired services are increasing rapidly, then the development of access network is then added service Video on Demand (VoD), data, telephone, and broadcast their own TV services in the HFC network service applications. Hybrid Fiber Coax is one of the access network technology that formed on the basis of a combination of optical and coaxial networks. Initially, HFC technology is widely used by cable TV operators to deliver broadcast TV service via cable. However, as the development era, HFC technology is more developed in its service features at once, which is itself a cable TV, telephone, Internet, and Video on Demand. These features allow delivered at once using the HFC network, which has the ability to provide large bandwidth and high speed data transmission.
Needs more interactive multimedia is one important aspect of supporting the development of HFC network. HFC network infrastructure originally dirnacang for direct services, infrastructure optimized to a two-way broadband services, making services HFCs as an economical alternative service between several planning platform that broadband access networks, such as ASDL and SDV. Excellence is combining the benefits of HFC network bandwidth optical fiber is very wide, and the shared nature of the coaxial cable. While the advantages of optical fiber itself is, on the use of major network TV cable is to reduce noise caused by the dikaskade amplifier, resulting in signal quality coaxial cable network of well maintained. In addition, excess optical fiber is to increase reliability in the planning of the cable. Transmission system used in the HFC network is an analog transmission using the method of Sub Carrier Multiplexing (SCM), where all the signal information for Broadcast TV services, VoD, data, and phone first modulated RF signal, and RF signals are converted into optical signals and transmitted using fiber optic transmission medium to the fiber node. At the fiber node, the optical signal converted back into RF signals and distributed to customers' homes using coaxial cable. At the customer's home, the RF signal and then converted back into the original information signal by the subscriber terminal corresponding to each service. Components - the composition of HFC network • Mater headend, as the central information service of the HFC network, where signals from various sources (such as satellite signals, the signals off air) is received and converted to a form of RF signal transmission. • Distribution Hub, an access network of distribution centers to customers' homes. Can be analogous to the STO on the PSTN. • Fiber Node, consisting of optoelectronic and power Inserter, serves to convert optical signals into electrical signals, then distributed to the coaxial network or vice versa. • Express Amplifier, as the reinforcement signal level dropped due to transmit on the cable attenuation express that aims to broaden the reach of fiber service node. • Feeder Amplifier, as the amplifier in a coaxial cable network that led to the customer. • Tap, is a combination of splitters and directional couplers, as a passive component to branch a signal from coaxial cable to homes of customers effectively. • Splitter, is a passive component that is used to divide an input signal into two output cable with the same major. HFC Network Segmentation The segmentation on the HFC network, can be grouped into 4 segments with different functions, namely: • Segment 1 Optical Transport Link or optical transport network, or known by the network of trunk, namely the relationship between the headend to the distribution hub, either the transmission of analog and digital transmission. • Segment 2 Optical Distribution Link (Fiber Distribution Network), for connecting between the distribution hub with optical fiber nodes using analog technology. • Segment 3 Coaxial Distribution Link (coaxial Distribution Network), to distribute RF signals that carry HFC network services from the fiber node to the customer locations, or vice versa. This coaxial distribution network to form the structure of tree and branch network, consisting of network components. • Segment 4 Drop customers, is the last link between passive feeder systems, which tap into your home or Ciu. HFC Service Application Many ways can be done to classify the types of applications HFC services, among others are: • Video Service Among them are off air TV, Pay per View, Pay-per-Channel, Video on Demand, Games on Demand, Music on Demand. • Data services, among others are: o Portal services o e-commerce o telemedicine o telelearning o VoIP o Video conferencing o Video streaming o Audio streaming • Voice Service, in the form of phone service with cable packet technique to the standard of quality, NCS, MGCP and PSTN. However, the design of its own HFC network, needs the support of all existing infrastructure, such as data collection, both internally and externally, and then also necessary technical requirements, and most importantly the existence of professional experts in their fields in order to run the planning, with ripe with success as expected