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Switching camera is not possible through remote control . You can on / off camera tracking in Studio USB by using remote.
As of now it is not possible to use remote control with E70.
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This forum reply or post is based upon my personal experience and does not reflect the opinion or view of my employer. Poly employee participation within this community is not mandatory and any post or FAQ article provided by myself is done either during my working hours or outside working hours, in my private time, and may be answered on weekends, bank holidays or personal holidays.