In telephony, a splitter, sometimes called a "plain old telephone service splitter," is a device that divides a telephone signal into two or more signals, each carrying a selected frequency range, and can also reassemble signals from multiple signal sources into a single signal. Users getting connected to the Internet with Asymmetric Digital Subscriber Line (ADSL) service may, in some cases, have a splitter installed at their home or business. Users elsewhere may be able to get splitterless service (which means that a splitter doesn't need to be installed). For ADSL, the splitter divides the incoming signal into low frequencies to send to voice devices and high frequencies for data to the computer. The telephone company's central office also uses a POTS splitter to send low-frequency voice signals on to the voice telephone network and to send high-frequency data to a Digital Subscriber Line Access Multiplexor (DSLAM) for transmission to the Internet.

This was last updated in April 2005

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