DSL is carried over a phone line. Yet it caries digital signals. the telephone company has to limit the bandwidth of the analog voice on the lines. So DSL is able to use the unused portion of the bandwidth to transmit digital data. hope that helps -------------------------------------------------------------------------------------------------------- According to Cisco : Network devices link together using a variety of connections: * Copper cabling - Uses electrical signals to transmit data between devices * Fiber-optic cabling - Uses glass or plastic wire, also called fiber, to carry information as light pulses * Wireless connection - Uses radio signals, infrared technology (laser), or satellite transmissions. so your answer would be electrical signals.
Digital and Analog
over cable, as optical signals over fiber, or wirelessly as radio signals
Electrical power, Control Signals, Data, and Memory Addresses. (CPU BUS)
Coaxial cable
Fiber optic cable.
Any individual IP packet can be communicated electrically over cable, as optical signals over fiber, or wirelessly as radio signals.
Generally it isn't possible to send two video signals on a single wire although there are instances where it can happen. Video over Ethernet allows multiple signals to be sent in packets although the nature of Ethernet means that the signals will each have a delay so synchronizing the signals may be difficult. Video over CAT5 uses converters that take a video signal and modify it to run over a single pair of a CAT5 cable. Normally, two more pairs would be used for stereo audio. If mono audio is used, it is possible to run two composite video signals with audio down one cable. Note that video over CAT5 uses the same cable as Ethernet but employs a very different signal format to Ethernet. Composite video signals use a single cable but in fact, the signal has three separate video components encoded into the signal. The signals are one for brightness and two for color information. Together they make up a full color signal and can be separated into the three components at the far end. Although the cable carries three signals, remember that they are all parts of the same color signal so this probably doesn't qualify as two signals. Finally, cable broadcasters use encoding systems to allow numerous signals to be carried on a single cable. The one that enters a house to supply a cable receiver carries many signals with just one being decoded and output by the receiver. This takes complex hardware at both ends so is outside the scope of most home users.
-Electrical power -Control signals -Memory addresses -Data
There are many types of cable covers available for all different types of needs. They make channeled cable covers that can protect cables so that you can drive over them. There are also cable covers that attach to the floor or walls.
asteroids! Multiplexing
The maximum distance a utp cable can handle is 100 m. If you need to bridge over 200 meter and you can only utp cable, you will need to put in enough hubs or switches so that the length of utp cable is never more than 100 m. You can forego of the utp cable and make use of COAX cable. A good quality cable will transmit signals over around 300 m. distance. You can forego of the utp cable and make use of fiber optic cable. Then you can transmit signals over a 40 km distance. Wireless Microwave and WiMax would be an option to cover the distance using radio waves.
Broadband is defined as signals over a range of frequencies, such as that used to access the internet. Types of broadband internet service include cable, DSL, fiber-optic and satellite. A broadband supplier would be the company that supplies broadband internet, such as Comcast, AT&T, and Time Warner cable.
Cable toner can be used for all types of cable television equipment for the several different types of television signal distributing systems. There are over one hundred and ten manufacturers, and over ten thousand products.