uplink cable

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

during the hub Cascade, the Cascade control switch should be placed on the MDI (uplink) and connected with a straight line. If the hub does not have a dedicated grade port, or can not use the cascade, you must use the Mdi-x mouth level, at which point, we can be used to achieve the purpose of the crossover line, where the intersection line, that is, when doing network cable, with one end RJ-45 plug 1 feet

resist external attacks and avoid external harm. Therefore, cable fire prevention has become the top priority. People often say that the fire of water is heartless. Since the fire was discovered by humans, fire not only accelerated the development of human civilization, but also brought destruction to human civilization. How many ancient civilizations were destroyed by the fire. Similarly, a fire can also burn out the Integrated Wiring System to inte

Intersection line: One is t-586a standard on the other end is the standard of t-568b can be directly connected to two computers (network card to the network card)Ordinary network cable (straight line) at both ends are generally t-568b standardSo: Need a specially made cable, or have a spare line to change it can also be changed only a head. When making the crystal head, the other end of the 1th and 3rd to s

, connect to other trunk optical fiber cables, lan, and local computer networks, and exchange data through the front-end devices of CMTS (Cable Modem Termination System) Cable, enables interactive dual-item data transmission.3 The Cable Modem transmission standard and frequency CM are modulated by 64QAM or 256QAM (orthogonal Amplitude Modulation) in the middle an

connection port control switch on the MDI (uplink) and connect it with a direct connection line. If the Hub does not have a dedicated-level connection port, or you cannot use a level-level connection port, you must use a MDI-X port level connection, then we can use a line to achieve the purpose, the line reference is as follows. Name nic1 nic2 name Tx + 1 3 RX + TX-2 6 RX- RX + 3 1 Tx + RX-6 2 TX- 3.100 M hub connections or direct connection between

replace it. But be aware, must be both ends are the same, that is not according to standard. Usually as long as the order of 1, 2, 3, 6 is OK, the number is a, B or non-standard mode replacement rules in the order of the Wire. We used to use a network cable, both the Internet and the installation of a phone. Today in the test of a network cable is very troublesome Line 1 line How to do all pas

information highway needs to be selected. The fiber-optic coaxial hybrid network (HFCs) of Radio and Television uses its backbone network as its high-capacity fiber-optic network, and uses the client as the coaxial cable. It has abundant frequency resources, large user volumes, and wide coverage, should be the first choice. This type of network is particularly suitable for broadcast-type businesses. Powered by the popularity of the simple

1. Use C programming to check whether the network card is connected to the network cable # Include # Include # Include # Include # Include Int main (){If (check_nic ("eth0") = 0)Printf ("detect OK./N ");ElsePrintf ("detect fail./N ");} // If the network card is connected, 0 is returned; otherwise,-1 is returned.Int check_nic (char * nic_name){Struct ifreq IFR;Int skfd = socket (af_inet, sock_dgram, 0 ); strcpy (IFR. ifr_name, nic_name); If (IOCT

"IPhone5S not certified Data cable solution Tutorial" 1, we install a ifile software or PP handset assistant in the computer, then the Apple handset connects the computer to find in the ifile: after System/library/coreservices/springboard.app/zh_cn.lproj,2, after entering, we find the springboard.strings inside.3, we are open by editing, if the hint "may not support this accessory", 4, we can go to this file to edit, delete, save, restart, perfect

is used to connect devices of the same type, such as computers and switches. To allow parallel connections between a vswitch and a vswitch, many vswitches have a dedicated up-link port. When you connect the uplink port of a vswitch to a common port of another vswitch, parallel lines can be used. However, the above statement is only common. Now there are many high-end vswitches whose ports are adaptive to the line sequence and seldom use cross lines

Cable Modem is developed in recent years, mainly for CATV network data transmission. Most new cable networks now use fiber-optic coaxial hybrid (HFC) networks, and their huge bandwidth and relative economics make them attractive to cable companies and newly established telecoms companies. Because cable modem is a kind

With the rapid development of broadband multimedia service and optical fiber communication technology, optical fiber communication technology has been used more and more widely in the access network. In the past, optical fiber network is mainly to meet the needs of transmission network construction, access to the layer of fiber optic cable needs less, a small number of access layer cable is generally direct

A bureau uses s5500+s2300 Network Way, because the upstream light path resources are less, so in the Community adopt S2300 Cascade Way, Cascade uses 5 class twisted pair, the user uses the PPPOE Way to surf the internet. After opening, some two-level switch users reflect slow internet speed. Process steps:The first step, the test on the two-level corridor switch, found that there is a problem, open the local site is very slow. Ping the packet on the computer , found that the ping public network

I. Overview The industry has been concerned about the characteristics of network data cable skins, such as whether the skin can meet the standard of flame retardant or low smoke, the presence of a high ignition point, fire resistance, and a halogen with the latter characteristic that releases poisonous gas in the combustion. Network wiring professionals and the vast number of network users even in different regions of the standard organizations, ther

The metropolitan area Optical cable line is mainly the pipeline optical cable, supplemented by the aerial and other laying way very few optical cables, its characteristics are: The line section is relatively short, can be divided into local trunking, user access network backbone and user to introduce optical cable, optical fiber

To build a new broadband community, we have many options, including the Ethernet access scheme, ADSL access scheme, Cable Modem and hfc-network scheme, and optical fiber access scheme. How should we choose these access solutions? Different solutions vary in application scenarios. Let's take a look at the features of several access solutions. High-speed Ethernet solution In the broadband access technology, Ethernet has become the most widely used loca

Integrated wiring system emerged Architectural pursuit of integration, intelligence, broadband, personalized information and communication network, integrated wiring System (PDS) emerged. With the rapid development of FTTB and FTTH technology, the indoor cable has been widely used in the building integrated wiring system (including horizontal and vertical wiring system). because of the special environment of indoor application, the indoor optical