[PTZ control] RS-485/422 is not controlled
product : SVR-1650, SVR-1640, SVR-950
The TERM 1 switch controls PORT A and TERM2 switch controls PORT B.
Nos 1 & 2: ON → RS-485 MODE, OFF → RS-422 MODE
Nos 3 & 4: ON → Terminal Setting, OFF → Terminal Clear
