| 单词 | splitter |
| 释义 | splitter 1. A digital subscriber line (DSL) modem, also referred to as a DSL filter. A DSL splitter is a multiplexer that combines upstream voice, data, and sometimes video signals at the customer premises prior to transmission over a single local loop. Asymmetric digital subscriber line (ADSL), the most common consumer-oriented DSL variant, supports voice over an analog channel and high speed Internet access over a digital channel, so the DSL modem is a simple frequency division multiplexer (FDM mux). The DSL modem also typically acts as a gateway, converting Internet Protocol (IP) data packets in Ethernet frames into asynchronous transfer mode (ATM) format prior to upstream transmission.The splitter acts as a combiner for upstream purposes.The splitter lives up to its name with respect to downstream transmissions, serving to split (i.e., demultiplex) the voice and data channels and to convert the data channels from ATM to IP packets inside Ethernet frames. See also ADSL, analog, ATM, channel, digital, downstream, DSL, Ethernet, FDM, frame, gateway, IP, local loop, multiplexer, packet, and upstream. 2. An electrical device that separates 74570c19.qxd 9/12/07 12:41 AM Page 455 |
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