External Transceiver

When an external transceiver (not present on the SunSwift SBus Adapter) is connected to the MII interface, the driver selects the external transceiver for networking operations.

• If the external transceiver supports auto-negotiation, the driver uses the auto-negotiation feature to select the link speed and mode.

• If the external transceiver does not support auto-negotiation, the driver selects the highest priority mode supported by the transceiver.

You can also manually select the speed and mode of the link. For example, two transceivers might not support the same mode and speed. Therefore, you must select the highest mode and speed that both transceivers support using the ndd utility. See the list of operating speeds and modes in the section, "Operating Speeds and Modes"," in this chapter.