https://download.discomp.cz/Grandstream/Datasheets/Datasheet_UCM6300_Audio_Series_English.pdf
Datasheethttps://download.discomp.cz/Grandstream/QIG/UCM6301-6302-6300A-6302A-QIG-1.pdf
Quick Installation Guidehttps://download.discomp.cz/Grandstream/User%20Guide/UCM630x-Audio-Series-User-Manual.pdf
User Manual