Hand Held Products 2020, 4620 system manual Communication Between the Cordless System and the Host

Communication Between the Cordless System and the Host

The cordless imager provides immediate feedback in the form of a “good read” indication (a green LED on the imager and an audible beep) after a bar code is scanned correctly and the base has acknowledged receiving the data. This is possible since the cordless system provides two-way communication between the imager and the base.

When data is scanned, the data is sent to the host system via the base unit. Confirmation from the host system or the base indicates that the data sent was received by the host. The cordless imager recognizes data acknowledgement (ACK) from the base unit. If it cannot be determined that the data has been properly sent to the base, the imager issues an error indication. You must then check to see if the scanned data was received by the host system.

1) Good Read

3)Base sends data to host

2) ACK from base

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