PHY Activity

If Ethernet is available:

LNK = Solid green when transceiver is linked.

ACT = Blinking green when transceiver detects Tx or Rx activity.

Otherwise, for all RS232 and RS422/485 activity:

LNK = Blinking green with Tx data activity.

ACT = Blinking green with Rx data activity.

Note: Red is never turned on.