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JANUS? 2020 Hand-Held Computer (4MB) - Intermec

JANUS? 2020 Hand-Held Computer (4MB) - Intermec

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<strong>JANUS</strong> <strong>2020</strong> <strong>Hand</strong>-<strong>Held</strong> <strong>Computer</strong> User’s Manual (<strong>4MB</strong>) NF BC<br />

6-46<br />

Examining a Typical BFT Session<br />

A typical BFT session, with the host computer acting as the client and the<br />

<strong>JANUS</strong> reader acting as the server, includes these activities:<br />

• The host computer and readers are connected with a CrossBar or<br />

900 MHz RF network.<br />

• The operator starts a BFT-ready PSK application on the reader and either<br />

continues working or stops working.<br />

Note: A BFT-ready PSK application has been programmed to accept the host’s<br />

Prepare for Reboot command, call a Prepare for Reboot PSK function, and notify the<br />

PSK library and host computer when the reader is ready to be rebooted. For help<br />

creating BFT-ready PSK applications, see your <strong>JANUS</strong> PSK reference manual.<br />

• From the host computer, an administrator starts the Data Collection<br />

Manager (DCM) or Interface Software (IS) application that manages the<br />

BFT process. This application sends a Prepare for Reboot command to a<br />

single reader or a group of readers.<br />

• The PSK application on the reader accepts the Prepare for Reboot<br />

command, optionally performs housekeeping tasks (such as closing files),<br />

and sends a Ready for Reboot message to the host. This ensures that the<br />

host computer has received all data queued in the controllers, as well as<br />

indicates that the reader is ready to be rebooted.<br />

• The host computer sends a Reboot command to the reader or readers. The<br />

reader reboots, and a command in AUTOEXEC.BAT starts FTSERVER.BAT<br />

if there is a copy of FTSERVER.BAT on drive C.<br />

FTSERVER.BAT starts the file transfer application (FTA.EXE). If FTA<br />

detects that a host computer rebooted the reader to initiate a BFT session,<br />

FTA continues running. Otherwise, it terminates.<br />

• The host computer can begin sending commands to the FTA:<br />

• The host computer may transfer binary files to and from the reader.<br />

• The host computer may update the reader’s drive C with a 512K image.<br />

• The host computer may set the IM_APPLICATION DOS environment<br />

variable to an application on the reader that will be run when the FTA<br />

terminates.<br />

• When the FTA terminates, the reader executes the command identified by<br />

the IM_APPLICATION DOS environment variable.

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