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    Getting to know your charging base

    A Battery Charge Level
    B Computer Mode
    C Bluetooth Mode*
    D Telephone Mode
    E Bluetooth Status*

    *LH670 & LH675 models only

    F USB Port
    G Power Port
    H AUX Port
    I Telephone Connector Port
    J Handset Connector Port
    K
    RHL/DHSG SwitchIf you're using a Yealink, Mitel, Grandstream, or Ooma Electronic Hookswitch, this should be set to DHSG. Otherwise leave set to RHL.
    L
    Compatibility Switch97% of desk phones should be set to either 1 or 4.
    M Mic Volume Up/Down