COMMELL HS-874P - Manual (Page 17)

HS-874P User’s Manual Hardware Setup
CPU installation 17
Jumper: JP1 (COM 1)
Type: onboard 3 x 2-pin header
JP1 Mode
1-3 Pin1 with +5V power.
2-4 Pin9 with +12V power.
3-5 Pin1 with DCD signal
4-6 Pin9 with RI signal
Default setting
Jumper: JP2 (COM 2)
Type: onboard 3 x 2-pin header
JP2 Mode
1-3 Pin1 with +5V power.
2-4 Pin9 with +12V power.
3-5 Pin1 with DCD/ 422TX-/485- signal
4-6 Pin9 with RI signal
Default setting
6 5 6 5
2 1 2 1
JP2 JP1