User manual

ARK-3381 User Manual 24

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

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

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

3-4 closed*