As seen from above on motherboard:
| Pin Number | Pin Name | Pin Number | Pin Name | 
|---|---|---|---|
| 1 | +12 | 2 | -12 | 
| 3 | DCD2 | 4 | DSR2 | 
| 5 | RXD2 | 6 | RTS2 | 
| 7 | TXD2 | 8 | CTS2 | 
| 9 | DTR2 | 10 | RI2 | 
| 11 | Gnd | 12 | COMM_B_DETECT | 
| 13 | EXT_RI2 | 14 | +5V | 
| 15 | NC | 16 | Gnd | 
COMM_B_DETECT: Connect to GND to enable COM2 in BIOS



 правильная
правильная с ошибками
с ошибками