User's Guide

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User Guide
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TFF-2220-00AA and TFF-2221-00AA User’s Guide D1436 Rev B
©2008 Zebra Enterprise Solutions. WhereCall IV and all product names and numbers are Zebra Enterprise Solutions trademarks. All other trademarks are the property of their respective owners.
4.1 Call Mode
In CALL mode the WhereCall IV can be used for parts call and other operations that do not
require an indication as to whether the request was fulfilled. In this mode, the operator
presses the button to send the request message, and the WhereCall IV will transmit blinks
with “Switch ID 0” which has status 2. The display on the WhereCall IV will flash CALL
for one minute and then start to count up in minutes since the call was made. This lets the
operator easily verify how long it has been since they made their request. The display is
capable of counting up to 9 days, 23 hours, and 59 minutes shown as 9d23h59m after which it
will continue to alternate between CALL and 9d23h59m but the elapsed time will not
increment any further.
The displayed CALL can be replaced with any other 8-character custom message. The
custom message will blink for one minute after each button push, and then the custom
message will alternate with the elapsed time.