The universal relation between the Kosterlitz-Thouless transition temperature Tc and the superfluid sheet density of thin-film superconductors with mean-field transition temperature Tc0 results in
Powerful new/old experimental evidence supports the filamentary model for the metal-insulator transition in randomly doped, uncompensated impurity-band semiconductors.
AT&T's 5ESS(TM) Switch offers advanced ISDN services and capabilities beginning with the 5E4 Generic release in 1986/1987.
Current telecommunication services are often provided by separate networks -- voice, circuit-data, packet-data, telex, private-line networks, etc.
In 1986, the first ISDN features were introduced in the United States.
ISDN Centrex is a reality in the United States.
AT&T, together with Local Exchange Carriers (LECs) and key customers, has been testing the economy and practical utility of ISDN in a series of case studies across a range of industries.
A great deal has been published in the telecommunications literature about ISDN, but little of this has focused on the way that existing business and residence custom services will operate in an IS
AT&T Bell Laboratories has been involved in testing equipment for conformance with network and product interface specifications for more than five years.
The customer access available in today's Integrated Services Digital Network (ISDN) provides the means to integrate circuit switching and packet switching into the public switched network (PSN) via
