Honeywell International Inc. MX2702 Manuale Utente

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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 scanner recognizes data acknowledgement 
(ACK) from the base unit.  If it cannot be determined that the data has been 
properly sent to the base, the scanner issues an error indication.  You must then 
check to see if the scanned data was received by the host system.
Connecting the Base When Powered by Host 
(Keyboard Wedge)
A base can be connected between the keyboard and PC as a “keyboard wedge,” 
plugged into the serial port, or connected to a portable data terminal in wand 
emulation or non decoded output mode.  The following is an example of a 
keyboard wedge connection:
1. Turn off power to the terminal/computer.
2. Disconnect the keyboard cable 
from the back of the terminal/
computer.
3) Base sends 
data to host
1) Good Read
2) ACK from base
Disconnect