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TUSB4020BI-Q1: If the TUSB4020BI-Q1 is connected with a hub, the mouse/ keyboard or CD-ROM will not be recognized.

michael Zhu
Prodigy 20 points
Part Number: TUSB4020BI-Q1

Dear Sir,

If the TUSB4020BI-Q1 is connected with a hub, the mouse/ keyboard or CD-ROM will not be recognized. Even if Replug the mouse/keyboard,The host computer can not recognize the key mouse or recognize only one device. This problem doesn't exist in other commercial hub. 

Thanks！