This document explains barcode scan process.

Barcode scanner is used primarily to quickly identify and locate items and orders in the WMS.
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Item labels can be scanned in the Item register and automatically trigger the display of the Item Details.
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Sales Orders, Pick Lists, and Packing Lists can be scanned in the Despatch register to automatically select Order Details.
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During the Packing process Order numbers and Items can be scanned to verify the correct stock is processed with the Order.
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The barcodes supported by WMS include :

Samples of barcode in the link http://www.barcodefaq.com/BarcodeMatch/

Putting scanner thru a USB hub is NOT recommended.

Datapel recommends the use of a Power Supply to be connected to the base station to assist with charging of the cordless scanner.