Motorola RMU2080 User Manual page 58

Symptom
Cannot activate VOX
Battery does not charge
although it has been placed in
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VOX feature might be set to OFF.
Use the CPS to ensure that the VOX Sensitivity level is not set to '0'.
Accessory not working or not compatible.
Refer to "Hands-Free Use/VOX" on page 30.
Check drop-in tray charger is properly connected and correspond to a
compatible power supply.
Refer to "Charging with the Drop-in Tray Single Unit Charger (SUC)" on
page 19 and "Charging A Stand-Alone Battery" on page 20.
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