catv channels

broadcasting and TV transmission service, so the actual application of WDM is not much. However, with the development of CATV integrated service, the increasing demand of network bandwidth, the implementation of various kinds of selective services, the consideration of the economic cost of network upgrading and transformation, the characteristics and advantages of WDM are appearing gradually in the CATV tr

, thousands of households are connected to catv TV stations on the same axis of copper wires. Recently, Internet connections have been started and used in local telephones. The higher the speed, the more channels, and two-way communication has been started. It is difficult to transmit high-frequency electrical signals from the same axis over a long distance. Therefore, to increase the communication distance

broadband network of telecommunication, but also in the broadband network of LAN and cable TV in the community. Now in the construction of intelligent community, computer network wiring has become an indispensable link, community users can through the computer, television (with set-top boxes) and other ways to achieve VOD video-on-demand applications, enrich the cultural life of people; CATV has been transformed in two directions, Can let the vast nu

There are multiple access methods for accessing the Internet at ordinary times, and the access speed provided by the ISP service provider is different from the download speed, which is hard to understand. The following lists the Internet access speeds for accessing the Internet:1. PSTN (published Switched Telephone Network, public telephone exchange network) technology uses PSTN to implement user access through MODEM dialing. A modem card is installed on the computer and connected to the Interne

Monitor monitors a variety of detailed networking states for multiple routing devicesNetperfmon database maintenance for maintaining the databases generated by the tools aboveSNMP Graph is used to collect detailed data of the set OID in a timely manner in the MIB.Bandwidth Gauges Monitor the path and bandwidth of remote devices in the form of metersBandwidth monitor channels and bandwidth of multiple devices in a timely fashion with trend graphsAdvan

upstream and downstream transmission channels of the cable TV HFCs are symmetric. Because the downstream channel is broadcast, it has good transmission characteristics and high signal-to-noise ratio, it can fully meet the technical requirements of communication and transmission. However, data transmission emphasizes two-way interaction. When users receive information, they also need to return personal information. In this way, the original cable TV n

the development of optical fiber communication from basic to commercial application. Since then, the optical fiber communication technology has continued to develop: from multi-mode to single-mode, and from 0.85um to 1.31 and 1.55um, the transmission rate has increased from dozens to dozens. On the other hand, with the development of technology and the formation of a large-scale industry, the price of optical fiber is constantly decreasing and the application scope is constantly expanding: from

Broadband wireless access technology is worth learning a lot. Here we mainly introduce the DOCSIS-based broadband wireless access technology, from the DOCSIS Protocol release to the current development trend, many related equipment manufacturers use DOCSIS Protocol in their 3.5 GHz MMDS products because DOCSIS uses many mature technologies to support IP services well, it has adapted to the current technological development trend, and has adopted a large number of Integrated Circuits Used in Cabl

community properties.The Intelligent Community Information system can be divided into two parts of information network subsystem and control network subsystem from function.The Information network subsystem is composed of data system, voice system, CATV system, on the one hand realizes the comprehensive access of data, voice and image, on the other hand provides the transmission channel for the control network subsystem, its transmission way is flexi

[It168] Choosing a suitable broadband line makes your own Broadband Router even more powerful. Currently, common wide-line channels include XDSL, CM, fttx + LAN, PLC, DDN, satellite access, and microwave communication. Which of the following broadband access methods is better? XDSL XDSL refers to the digital user line access technology developed on telephone lines. Currently, it is commonly used in two types: ADSL and VDSL.① ADSL (Asymmetric Dig

-olt) which is placed in the cell room, ONACCESS5XXX series low cost optical switch and the optical Network unit placed on the user side (Optical network unit- ONU) OnAccessH1001 composition. Transmission medium is single-mode fiber, can choose single fiber, also can choose double fiber. A onaccess5xxx optical switch can connect up to 24 users of the ONACCESSH1001 Optical Network unit, ONACCESSH1001 can also line up to 4 computers or IP telephony. If the user has only one computer can choose OnA

the Optical Network Unit-ONU) onaccessh1001. The transmission media is a single-mode optical fiber. You can select either a single fiber or a dual fiber. An OnAccess5xxx optical switch can connect to the OnAccessH1001 optical network unit of 24 users. OnAccessH1001 can be connected to up to four computers or IP phones at the same time. If you only have one computer, you can select the OnAccess1001 Optical Fiber Nic to be inserted into the computer and directly connect to the optical fiber. The

communication and CATV access cable Resources in the residential area belong to all operators. Another feature of China's FTTH target market is the existence of industry barriers in the telecom business: telecom operators are not allowed to operate CATV services, and this situation cannot be changed for quite some time in the future. 2. Selection of FTTH Optical Fiber Access Technology in China1) Passive O

commercial buildings, are generally equipped with communication equipment rooms for installing communication access equipment and line handover for the entire residential area, this configuration is required for telecom operators to compete with each other and comprehensive access to a variety of telecommunication services. The distance between data centers and users is generally less than 1 km; major telecom operators and cable TV operators have already laid 4 to 12 cores in general.) optical

the residents of residential areas in large and small cities. Urban residential areas are generally garden-type residential areas, which are characterized by high household density, A single Garden Residential Area generally has-households, and some even tens of thousands of households. residential areas, including commercial buildings, are generally equipped with communication equipment rooms for installing communication access equipment and line handover for the entire residential area, this

provides a connection between mobile users and data networks to provide mobile users with high-speed wireless access technical services. In terms of system upgrading, MMDS technology will be easier to upgrade than other communication technologies. The most notable feature of MMDS is that the Local Vibration points of each frequency drop can be different, and the user can choose the frequency point, that is, the multi-point Local Vibration. Therefore, the signal after the frequency change of eac

information (including voice, data, and images) can be integrated and transmitted through a structured integrated cabling system, to obtain the maximum flexibility of information transmission. For example, closed-circuit television monitoring signals and CATV signals can be transmitted using RF cables or Cables Using a structured Integrated Wiring System (the adapter must be added, of course). These applications are technically not a problem, such as

coaxial cable hybrid network (HFCs) systems, Passive Optical Networks, fiber-to-households, and/or roadside. Wavelength Division Multiplexing As new cable TV technologies are emerging, cable TV providers must meet the needs of increasing bandwidth in the network. From the beginning to the center, the bandwidth needs have been resolved by intensive Wavelength Division Multiplexing (CWDM. Recently, the cable TV supplier's system structure has been transferred from the basic system head end to the

As The first company in China that specializes in R D and production of Fiber To The Home-FTTH equipment, we have recently received many FTTH application requirements To communicate with different types of FTTH users, we found that many users have misunderstandings about FTTH technology selection and application. These misunderstandings include ignoring the FTTH technical risks and blindly requiring full-service access; failing to understand the FTTH market characteristics in China, and blindly

basic waveform representing different discrete values (1 yards can carry n bits of information)Channel: The media that transmits information in one Direction (daily communication lines are: 1 channels to send messages + 1 channels to receive information)Unidirectional communication (simplex): Communication in One Direction with no reciprocal directionBidirectional alternating communication (half-duplex com