User Manual

Ensure Technologies – User’s Guide for XyLoc Client ver 8.x.x
Drawing#: 510-0100-003 Drawing Rev: 0.08 Rev Date: 04-25-2006
Page 60 of 62
System Functionality
Normal Operational Mode
The majority of users will use XyLoc in “Normal Operational Mode.” In normal operation,
the XyLoc Lock and Key are in constant, encoded wireless communication with each other,
with the Lock searching for the presence or absence of authorized Keys. As an authorized
user approaches the PC, XyLoc responds and the Key and the Lock engage in an over-the-air
authorization. Once XyLoc identifies and authenticates the user, it unlocks the PC until the
user moves out of the Active Zone.
When the authorized user moves out of the Active Zone, XyLoc automatically blanks the
screen, locks the keyboard and disables the mouse. The PC is instantly secured and remains
so until an authorized user moves back inside the Active Zone. Background tasks, such as
printing and downloading, however, may continue while the PC is securely locked.
Hardware Architecture
Both the Lock and the Key incorporate two embedded controllers, which allow the operating
firmware to be updated in the field so new features can be added.
The Lock can receive firmware updates via the USB port. This firmware is stored in flash
memory and is used to control the operation of the system. The communications controller
controls the Lock-to-host communications, and is permanently programmed. The Lock also
incorporates an EEPROM that stores operational parameters, such as channel allocations.
The Key has a similar architecture and can receive firmware updates via a proprietary
programming cable attached to a PC.
Radio Frequency (RF) System
XyLoc operates in the 900 MHz frequency band – the same radio frequencies used by
cordless telephones and other common wireless devices. Its power output is lower than
cordless phones and far less than that of the cellular phones many people use every day.
XyLoc is as safe to operate as any common household communication device, such as a
cordless phone or baby monitor.
The operating frequency is set at the factory and cannot be changed out of the certified band
by the end user. The power output level is also set at the factory and cannot be changed by
the end user.
The XyLoc RF link uses a combination of spatial spectral reuse and time-division multiple
access (TDMA). This combination of techniques improves the integrity of the RF link and
insures that other radio devices will not interfere with XyLoc’s proper operation.