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
What Wondrous Love Is This joyful be, and through eternity I'll sing on, I'll sing on, and through eternity I'll sing on. </poem> What Wondrous Love Is This "What Wondrous Love Is This" (often just referred to as "Wondrous Love") is a Christian folk hymn, sometimes described as a "white spiritual", from the American South. Its text was first published in 1811, during the Second Great Awakening, and its melody derived from a popular English ballad. Today it is a widely known hymn included in hymnals of many Christian denominations. The hymn's lyrics were first published in Lynchburg, Virginia in the 1811 camp meeting songbook