Glossary I
Centillion 1200N ATM Switch User Manual B-35
NTP 297-8103-903
Interior
Denotes that an item (e.g., link, node, or reachable address) is inside of a PNNI
routing domain.
Internal Reachable Address
An address of a destination that is directly attached to the logical node adver tising
the address.
IOP
Interoperability: The ability of equipment from different manufacturers (or
different implementations) to operate together.
IP
Internet Protocol: Originally developed by the Department of Defense to support
interworking of dissimilar computers across a network. This protocol works in
conjunction with TCP and is usually identified as TCP/IP. A connectionless
protocol that operates at the network layer (layer 3) of the OSI model.
IPOA
IP Over ATM
IPX
Novell Internetwork Packet Exchange: A built-in networking protocol for Novell
Netware. It was derived from the Xerox Network System protocol and operates at
the network layer of the OSI protocol model.
IS
Intermediate System: A system that provides forwarding functions or relaying
functions or both for a specific ATM connection. OAM cell s may be generated and
received.
ISDN
Integrated Services Digital Network: A switched network providing end-to-end
digital connections where voice, data, video and image services are provided over
the same transmission facilities.ISDN comes today in two basic flavors-BRI,
which is 144,000 bits per second and design for the desk top, and PRI which is
1,544,000 bits per second and design for telephone switches, computer telephony
and voice processing systems.Neither ISDN BRI or ISPN PRI is a standard service,
though there are several "standard" configurations.ISDN BRI is a wonderful
service in your home or office because it can give you video conferencing, and
ultrafast data communications.But it is not an easy service to get up and running.