Advantech ARK-3381 - Figure 3.5:JP16 Jumper Pin Layout; Figure 3.6:JP17 Jumper Pin Layout; COM3~COM6 Ring; Voltage Selection; Table 3.8:COM3 Ring;Voltage Selection

ARK-3381 User Manual 26
3.9 COM3~COM6 Ring / Voltage Selection
(JP11/JP12 Located on internal I/O board)
The “RI” signal pin of COM3 ~ COM6 can be configured to support the
functions of either carrying the power source of 5V or 12V; or wake on
ring.
(*): means default setting of the jumper/function
(*): means default setting of the jumper/function
Figure 3.5: JP16 Jumper pin layout Figure 3.6: JP17 Jumper pin layout
Table 3.8: COM3 Ring/Voltage Selection
Serial port Function JP11 JP12
COM 3 5V
12V
wake on ring*
2-4 closed
4-6 closed
open*
open
open
1-2 closed*
Table 3.9: COM4 Ring/Voltage Selection
Serial port Function JP11 JP12
COM 4 5V
12V
wake on ring*
1-3 closed
3-5 closed
open*
open
open
3-4 closed*