Interesting enough: (Webpoedia) Broadband: A type of data transmission in which a single medium (wire) can carry several channels at once. Cable TV, for example, uses broadband transmission. In contrast, baseband transmission allows only one signal at a time. Most communications between computers, including the majority of local-area networks, use baseband communications. An exception is B-ISDN networks, which employ broadband transmission. Baseband: The original band of frequencies of a signal before it is modulated for transmission at a higher frequency. The signal is typically multiplexed and sent on a carrier with other signals at the same time. (TechEncyclopedia by Techweb) Broadband: (1) High-speed transmission. The term is commonly used to refer to communications lines or services at T1 rates (1.544 Mbps) and above. However, the actual threshold of broadband is very subjective and may be well below or well above T1 depending on the situation. For example, on2.com (see TrueMotion) offers "broadband streaming video" to users with access to the Internet at 250 Kbps or higher. Other sources claim 45 Mbps is the starting point. In every case however, it implies transmitting at higher speeds than what has been most common up to the current time. See cable modem, DSL and T1. (2) A method of transmitting data, voice and video using frequency division multiplexing (FDM), such as used with cable TV. Modems are required to modulate digital data streams onto the line. Broadband in this context is used in contrast with baseband, which is all digital transmission and uses time division multiplexing (TDM). However, the term is mostly used in definition #1 above. See baseband for illustration. --------------------------- Dennis Dayman dennis@thenose.net ---------------------------------------------------------------------------- -- What goes up, must come down. Ask any system administrator. ---------------------------------------------------------------------------- --