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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.
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.
MSR
Both Wedge and USB DynaKeys provide an optional 3-track MSR in
either ISO or JIS head configurations. The Wedge DynaKey cannot
detect if the MSR is present, and even if it could, has no way to indicate
that information to the host computer.