MX310HD User’s Manual
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1.10.3 COM1 Ring-In/ +12V/ +5V Select: JP5
This header provides the options of selecting the COM port function as “Ring-in” (default), or
“+5V”, or “+12V”.
1.10.4 COM2 Ring-In/ +12V/ +5V Select: JP6
This header provides the options of selecting the COM port function as “Ring-in” (default), or
“+5V”, or “+12V”.
