The waterfall has been known as the Angel Falls since the Mid-20th century; they are named after Jimmie Angel, a US aviator, who was the first person to fly over the falls. Angel's ashes were scattered over the falls on 2 July 1960. The common Spanish name Salto Ãngel derives from his surname.
Integrated Services Digital Network (ISDN) is a set of communication standards for simultaneous digital transmission of voice, video, data, and other network services over the traditional circuits of the public switched telephone network. It was first defined in 1988 in the CCITT red book.
An ISDN provides a set of network capabilities which enable telecommunication services to be offered to a user (refer to the I.200 series of CCITT Recommendations). ISDN connection types are a description, using the attribute method of CCITT Recommendation I.140 [12], of the Basic Low Layer Functions (BLLFs) of the ISDN. The set of possible values for the