Add-drop multiplexer Add-drop multiplexer An add-drop multiplexer (ADM) is an important element of an optical fiber network. A multiplexer combines, or multiplexes, several lower-bandwidth streams of data into a single beam of light. An "add-drop" multiplexer also has the capability to "add" one or more lower-bandwidth signals to an existing high-bandwidth data stream, and at the same time can extract or "drop" other low-bandwidth signals, removing them from the stream and redirecting them to some other network path. This is used as a local "on-ramp" and "off-ramp" to the high-speed network. ADMs can be used both in long-haul core networks and in
This Is What You Came For it and cut the vocals", and also confirming her previous request for secrecy as co-songwriter. The credit has since been officially changed to "Taylor Swift" in BMI's and ASCAP's entry for the song. "This Is What You Came For" is an EDM song. Gil Kaufman of "Billboard" stated that the song is "a chilled-out, joyful club track that nods to classic Chicago house from the late 1980s and early 1990s, but with a modern, poppier flavor." The song is written in the key of A minor with a tempo of 124 beats per minute. The song follows a chord progression