Why does my Symbol DS3578 emit four long low beeps after scanning a bar code?
- MMichael WaltonAug 21, 2025
If the Symbol Barcode Reader emits four long low beeps after scanning a bar code, ensure the correct host interface cable is used and that all cable connections are secure. Scan the PAIR bar code on the cradle connected to the host. If the digital scanner has disconnected, refer to the disconnect beep sequence information. Also, ensure the cradle’s communication parameters match the host's setting. If the cradle has not completed USB initialization, wait several seconds and scan again.












