In-band
signaling - Signaling made up of tones which pass
within the voice frequency band and are carried along
the same circuit as the talk path being established by
the signals. Virtually all signaling ( request for
service, dialing, disconnect, etc. ) in the U.S. is
inband signaling. Most of that signaling is MF (
multi-frequency ) dialing. The more modern form of
signaling is out-of-band.
Information element - The name for the data
fields within an ISDN Layer 3 message.
Interexchange carrier ( IXC ) - A common carrier
that provides services to local exchanges on an intra or
interLATA basis in compliance with local or Federal
regulatory requirements. Traditionally IXCs have been
long distance carriers.
Interface - A common boundary between two systems
over which the inter-system communication occurs.
Inverse Multiplexing - Speeds up data
transmission by dividing a data stream into multiple
concurrent streams that are transmitted at the same time
across separate channels (such as T-1 or E-1 lines) and
are then reconstructed at the other end back into the
original data stream.
IP - The Internet Protocol (IP) is the method
or protocol by which data is sent from one computer to
another on the Internet.
IP Address - A 32-bit number that identifies
each sender or receiver of information that is sent in
packets across the Internet.
ISDN - Integrated services digital network. A
digital transmission technology that allows large
quantities of data to be transmitted over copper or
fiber at speeds from 64 kbps to 128 kbps. ISDN comes in
two forms: BRI and PRI, depending on your needs. BRI,
Basic Rate Interface, is designed for desktop
applications. PRI, Primary Rate Interface, is designed
primarily for telephone switches, computer telephony,
and processing systems.
IT - Information Technology is a term that
encompasses all forms of technology used to create,
store, exchange, and use information in its various
forms (business date, voice conversations, still images,
motion picture, multimedia presentations, and other
forms, including those not yet conceived).
ITU-T - International Telecommunications Union
Telecommunications Standardization Sector.
International
Telecommunications Union-Telecommunications Standards -
(the new name for CCITT). An
international standards body which is a committee of the
ITU, a UN treaty organization.
JBIG - Joint Bi-Level Image Experts Group of ISO.
Produced text compression standard used in T.120.
JPEG - Joint Photographics Experts Group of ISO.
Produced still-image compression standard used in T.120.
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