(communications) A device that transfers control, timing, and data signals between switching processor subsystems; designed to provide physical and electrical isolation, to provide for simple addition of units on an in-service basis, and to provide pluggable connection for efficient factory testing, installation, and maintenance.
Hamilton Grange is located within New York City's Saint Nicholas Park, which is open from 6:00 a.m. to 1:00 a.m., but the grounds immediately surrounding the building are National Park Service property and maintain the same operating hours as the visitor center.
The copy of the Federalist Papers that is pictured above is a first edition in the collection of the Library of Congress. It was originally owned by Alexander Hamilton's wife, Elizabeth, who gave it to her sister, Angelica Church, from whom her friend, Thomas Jefferson, acquired it.