Hitachi Lighting 9900 Series Architecture Manual page 65

Hitachi Data Systems
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EBCDIC
Abbreviation of Extended Binary-Coded Decimal Interchange Code. Pronounced
eb-sih-dik, EBCDIC is an IBM
Although it is widely used on large IBM
PCs and Macintoshes ®
asynchronous.
Electronic vaulting
The transfer of data to an offsite storage facility via a communication link rather than
via portable media. Typically, electronic vaulting is used for batch or journaled updates
to critical files to supplement full backups that are taken periodically.
ESA/390
®
Enterprise Systems Architecture/390
architecture for mainframe computers and peripherals. Processor systems that follow
this architecture include the IBM ES/9000
series name to eServer zSeries.
ESCON ®
Enterprise Systems Connection architecture is an IBM
computer peripheral interface or connection between two mainframes for data
exchange. The I/O interface utilizes ESA/390
that configures attached units to a communication fabric. ESCON
networking technology. ESCON
between mainframe systems over fiber-optic links at distances up to 43 kilometers or
25 miles. ESCON also provides a way for communication controllers and other
®
devices to share a single channel to a mainframe.
ESCON Director
An I/O interface switch that allows the interconnection of multiple ESCON
interfaces in a distributed-star topology.
Ethernet
A Local Area Network (LAN) protocol developed by Xerox
Digital Equipment and Intel in 1976. Ethernet supports a star or bus topology and
supports a data transfer rate of 10 megabits per second or 10 Mbps. The Ethernet
specification formed the basis of the IEEE 802.3 standard, which specifies the physical
and lower software layers. Ethernet uses the CSMA/CD access method for handling
simultaneous demands and is one of the most widely implemented LAN standards.
Ethernet is also known as 10BaseT. See also Fast Ethernet, Gigabit Ethernet.
Fabric
A group or network of switches arranged in such a way as to enhance scalability and
connectivity.
code for representing characters as numbers.
®
computers, most other computers, including
®
, use ASCII codes. See also ASCII, binary, synchronous, and
. Often abbreviated S/390
®
family. In 2000, IBM
®
logical protocols over a serial interface
®
provides direct channel-to-channel connections
®
, ESA/390 is an IBM
® ®
changed the server
®
® mainframe ESA/390 ®
® is based on
®
® in cooperation with
®