Connect your modem to a TV wall jack with the coaxial cable that came with your modem, then plug in the power source. If you have an external router, connect it to your modem to set up a wireless network , or connect your devices directly to the modem via Ethernet. Plug one end of an Ethernet cable into your modem and the other end into the router's WAN port. Locate your router's network name and network key usually found on the bottom of the device , then connect to the Wi-Fi network on your computer.
Potential reasons your modem isn't working include loose or damaged cable connections, miscommunication with the router, overheating, and outdated firmware or equipment. If you can't connect to your Wi-Fi network, then you need to troubleshoot your router.
Connect the cable splitter to the wall socket, then connect the modem and TV to the splitter. The minimum signal-to-noise ratio SNR requirement for a cable modem is Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content. Create a personalised content profile. Measure ad performance.
Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. The downstream subsystem is designed for converting incoming Internet Protocol IP traffic into radio frequency broadband signals that are broadcast using a broadband network hub BNH over cable TV wiring to local groups of connected subscribers.
The upstream subsystem usually consists of banks of ordinary telephone modems to allow for easy expansion of services to additional subscribers. The router is used to route network traffic between clients and local content servers hosted by the cable provider, and to the Internet.
Cable modems offer downstream speeds comparable to T1 lines, but competing technologies, lack of standards, and implementation costs are hindering widespread deployment and use of this technology. All subscribers in a one-way cable modem local service area are essentially on a local area network LAN and, if they have a packet sniffer, they can see each other. If you are using a one-way cable modem with the Microsoft Windows 98 operating system on your computer, you should disable file and print sharing so that other users in your local service area cannot see your system or access resources on it.
In most cases, the network frames , or groups of data, are in MPEG format , so an MPEG synchronizer is used to make sure the data groups stay in line and in order. In cable modems that use the cable system for upstream traffic, a modulator is used to convert the digital computer network data into radio-frequency signals for transmission. This component is sometimes called a burst modulator , because of the irregular nature of most traffic between a user and the Internet, and consists of three parts:.
The MAC sits between the upstream and downstream portions of the cable modem, and acts as the interface between the hardware and software portions of the various network protocols. All computer network devices have MACs, but in the case of a cable modem the tasks are more complex than those of a normal network interface card.
The microprocessor's job depends somewhat on whether the cable modem is designed to be part of a larger computer system or to provide Internet access with no additional computer support.
In situations calling for an attached computer, the internal microprocessor still picks up much of the MAC function from the dedicated MAC module. In systems where the cable modem is the sole unit required for Internet access, the microprocessor picks up MAC slack and much more. In either case, Motorola's PowerPC processor is one of the common choices for system designers.
The downstream information flows to all connected users, just like in an Ethernet network -- it's up to the individual network connection to decide whether a particular block of data is intended for it or not.
On the upstream side, information is sent from the user to the CMTS -- other users don't see that data at all. The narrower upstream bandwidth is divided into slices of time, measured in milliseconds, in which users can transmit one "burst" at a time to the Internet. The division by time works well for the very short commands, queries and addresses that form the bulk of most users' traffic back to the Internet.
Since a single channel is capable of 30 to 40 megabits per second Mbps of total throughput, this means that users may see far better performance than is available with standard dial-up modems.
The single channel aspect, though, can also lead to one of the issues some users experience with cable modems. If you are one of the first users to connect to the Internet through a particular cable channel, then you may have nearly the entire bandwidth of the channel available for your use.
As new users, especially heavy-access users, are connected to the channel, you will have to share that bandwidth, and may see your performance degrade as a result. It is possible that, in times of heavy usage with many connected users, performance will be far below the theoretical maximums. The good news is that this particular performance issue can be resolved by the cable company adding a new channel and splitting the base of users.
How does a modem work and what are the affects on your internet speed? Business cable modems are an essential piece of hardware for functioning Internet and data communications systems. Finding a unit with the right capabilities is crucial to unlocking full communication capabilities, including:. Keep in mind these cable modem tips when upgrading or selecting your internet service provider or communication hardware.
Modems must be compatible with your internet service provider. Carriers typically give you a matching unit if you sign up to rent modems and routers directly from them. Both can be done by checking the DOCSIS standard release number as well as calling your provider to hear their definitive modem list. Many internet providers advertise packages according to their max download speeds in Mbps. Typical download speeds depend on your service provider, geographic location, hardware condition, package tier type and other variables.
Cable modems operate under an asynchronous delivery, meaning those upload speeds will be a fraction of the stated download speeds.
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