Lucent Technologies DEFINITY ProLogix Solutions Overview page 192

10
Integrated Services
Digital Network
(ISDN)
DEFINITY ProLogix Solutions Release 2 Overview 555-235-100
DEFINITY ProLogix Solutions provides complete ISDN support for up to 500
stations (600 ports). Demonstrating its role as a leader in making ISDN a universal
reality, Lucent Technologies makes it possible for anyone connected to DEFINITY
ProLogix Solutions to benefit from ISDN capabilities and features.
ISDN eliminates the need for multiple, separate access arrangements for voice, data,
facsimile, and video services and networks. Using the same pair of wires that now
carry simple telephone calls, ISDN can deliver voice, data, and video services in
digital format.
ISDN is a global access standard established by the Consultative Committee for
International Telephone and Telegraph designed to help you move and manage
information with unprecedented ease and productivity — anywhere in the world.
ISDN uses a layered protocol that conforms to layers one, two, and three (physical,
link, and network layers) of the 7-layer Open Systems Interconnect Reference Model
of the International Standards Organization.
DEFINITY ProLogix Solutions supports the ISDN Primary Rate Interface, which is
used for connecting premises equipment such as switches to the network and acts as a
powerful interface between intelligent equipment such as switches and computers. In
the U.S., DEFINITY ProLogix Solutions supports line-side or trunk-side ISDN-BRI.
Network Interfaces and Equipment
Issue 2 June 1999 10-20