5-8
Chapter 5: 5953 USB DynaKey Migration
Keylock
Both
Wedge
and
USB
DynaKeys
include
a
4
position
Keylock.
In
the
Wedge
DynaKey
it
is
an
every
‐
unit
‐
item
(EUI),
whereas
in
the
USB
DynaKey,
the
Keylock
can
be
optional
if
required,
as
a
SCER.
The
Wedge
DynaKey
implements
the
Keylock
as
a
PS/2
wedge
device.
The
USB
DynaKey
implements
the
Keylock
as
a
separate
HID
device.
Because
USB
is
designed
for
plug
‐
and
‐
play
(PnP),
the
presence
or
absence
of
the
Keylock
is
easily
detected
by
the
host
software.
In
both
DynaKeys,
placing
the
key
in
the
L
(locked)
position
disables
the
keyboard.
In
the
Wedge
DynaKey,
the
MSR
and
the
external
scanner
port
are
disabled.
In
the
USB
DynaKey,
the
MSR
and
the
external
USB
ports
are
disabled.
In
the
USB
Touch
DynaKey,
the
touch
screen
is
disabled.
Key Click
Both
Wedge
and
USB
DynaKeys
provide
a
small
speaker
that
can
be
used
to
make
a
key
click
sound.
The
exact
sound
made
for
key
clicks
is
programmable
in
both
devices,
and
the
sounds
available
are
comparable.
Error Tone
Both
Wedge
and
USB
DynaKeys
incorporate
the
ability
for
host
software
to
evoke
an
error
tone
using
the
key
click
speaker.
The
capabilities
are
comparable.
