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
Is This What You Want? demos at the company's original headquarters, on Baker Street in central London.<ref name="Davis/liner notes">Liner notes by Andy Davis, "Is This What You Want?" CD booklet (Apple/EMI, 2010; produced by George Harrison, Jackie Lomax, Mal Evans & Paul McCartney).</ref> John Lennon was the first to suggest he should consider becoming a solo artist, and with the formation of Apple Records in early 1968, George Harrison committed to producing an album by Lomax on the new label. Lomax later admitted he was concerned that the album might never get made since he was unsure whether Harrison would ever come back from India,