Roland M-380 Owner's Manual page 19

● The Auto MDI/MDI-X function has been added.
This function automatically detects the type of the connected Ethernet cable (Crossover or Straight) and configures the connection appropriately.
By enabling this, both Crossover and Straight Ethernet cable can be supported for REAC connection.
1.
In the SETUP section, hold down [SYSTEM] and turn the power on.
The SYSTEM CONFIG screen will appear.
2.
Press [F4 (REAC)].
The REAC popup will appear.
3.
Press [ENTER] to check "Auto MDI/MDI-X".
4.
Press [F8 (OK)].
5.
Turn off the power.
Functionality added in version 1.2
19