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DB-9
connector.
A
9–pin
version
of
the
RS–232C
port
interface.
dc.
Direct
current.
defined
zone
configuration.
The
complete
set
of
all
zone
objects
that
are
defined
in
the
fabric.
The
defined
configuration
can
include
multiple
zone
configurations.
See
also
enabled
zone
configuration
and
zone
configuration
.
DHCP.
Dynamic
Host
Configuration
Protocol.
disparity.
The
proportion
of
ones
and
zeros
in
an
encoded
character.
Neutral
disparity
means
an
equal
number
of
each,
positive
disparity
means
a
majority
of
ones,
and
negative
disparity
means
a
majority
of
zeros.
DLS.
See
dynamic
load
sharing
.
DMA.
See
direct
memory
access
.
DNS.
Distributed
name
server.
domain_ID.
Unique
identifier
for
the
switch
in
a
fabric.
Usually
automatically
assigned
by
the
switch,
but
can
also
be
assigned
manually.
Can
be
any
value
between
1–239.
DRAM.
See
dynamic
random
access
memory
.
DTE.
Data
terminal
equipment.
Usually
refers
to
a
terminal.
DWDM.
Dense
wavelength
division
multiplexing.
Allows
more
wavelengths
to
use
the
same
fiber.
dynamic
random
access
memory
(DRAM).
A
storage
in
which
the
cells
require
repetitive
application
of
control
signals
to
retain
stored
data.
E
edge
fabric.
A
single
fabric
that
uses
two
or
more
switches
as
a
core
to
interconnect
multiple
edge
switches.
Synonymous
with
dual-core
fabric.
See
also
resilient
core
.
edge
switch.
A
switch
whose
main
task
is
to
connect
nodes
into
the
fabric.
See
also
core
switch
.
E_D_TOV.
See
error
detect
timeout
value
.
EE_credit.
See
end-to-end
credit
.
effective
zone
configuration.
The
particular
zone
configuration
that
is
currently
in
effect.
Only
one
configuration
can
be
in
effect
at
once.
The
effective
configuration
is
built
each
time
a
zone
configuration
is
enabled.
EIA.
Electronic
Industries
Alliance.
EIA
rack.
A
storage
rack
that
meets
the
standards
set
by
the
Electronics
Industries
Alliance
(EIA).
electromagnetic
compatibility
(EMC).
The
design
and
test
of
products
to
meet
legal
and
corporate
specifications
dealing
with
the
emissions
and
susceptibility
to
frequencies
in
the
radio
spectrum.
Electromagnetic
compatibility
is
the
ability
of
various
electronic
equipment
to
operate
properly
in
the
intended
electromagnetic
environment.
electromagnetic
interference
(EMI).
Waves
of
electromagnetic
radiation,
including
but
not
limited
to
radio
frequencies,
generated
by
the
flow
of
electric
current.
electrostatic
discharge
(ESD).
The
flow
of
current
that
results
when
objects
having
a
static
charge
come
into
close
enough
proximity
to
discharge.
ELP.
Extended
link
parameters.
ELWL.
See
extra
long
wavelength
.
EMC.
See
electromagnetic
compatibility
.
EMI.
See
electromagnetic
interference
.
enabled
zone
configuration.
The
currently
enabled
configuration
of
zones.
Only
one
configuration
can
be
enabled
at
a
time.
See
also
defined
zone
configuration
and
zone
configuration
.
end
port.
A
port
on
an
edge
switch
that
connects
a
device
to
the
fabric.
end-to-end
credit
(EE_credit).
The
number
of
receive
buffers
allocated
by
a
recipient
port
to
an
originating
port.
Used
by
class
1
and
class
2
services
to
manage
the
exchange
of
frames
across
the
fabric
between
source
and
destination.
See
also
end-to-end
flow
control
and
buffer-to-buffer
credit
.
end-to-end
flow
control.
Governs
flow
of
class
1
and
class
2
frames
between
node
ports
(N_ports).
See
also
end-to-end
credit
.
E_port.
See
expansion
port
.
error.
As
applies
to
fibre
channel,
a
missing
or
corrupted
frame,
timeout,
loss
of
synchronization,
or
loss
of
signal
(link
errors).
See
also
loop
failure
.
error
detect
timeout
value
(E_D_TOV).
The
time
that
the
switch
waits
for
an
expected
response
before
declaring
an
error
condition.
Adjustable
in
1
microsecond
increments
from
2—10
seconds.
ESD.
See
electrostatic
discharge
.
exchange.
The
highest
level
Fibre
Channel
mechanism
used
for
communication
between
node
52
SAN16B-2
Installation,
Service,
and
User’s
Guide
Summary of Contents for SAN16B-2 - TotalStorage Express Model Switch
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