Equipment Design of N3 Carrier Terminals and Carrier Supply
01 July 1966
The N3 carrier terminal is a 24-channel, single-sideband, transistorized short-haul carrier terminal designed for use with carrier lines using N l , N1A, or N2 repeaters. It may be connected to pairs in the same cables with N l , N2, ONI, and ON2 systems. It is the successor to the ON2 carrier terminal and is designed to meet the latest performance requirements for two-way direct distance dialing or voice band data channels. The new N3 terminals provide important transmission improvements, as compared to ON2 terminals, which are discussed in companion papers. 1 - 2 For reasons of economy and improved performance, these new terminals are arranged in shop-wired packages together with functionally related signaling, trunk processing, carrier supply, and channel patching jack equipment. This paper will discuss equipment design features of both the carrier terminal and the associated common carrier supply as they affect transmission performance, economy of manufacture, engineering, installation, maintenance, operating convenience, and system reliability. 845