Confirm your model
Identify the ADU and BDU labels separately. The manual pairs FX250 with Class 9 ADU and FX250 BDU, and FX500 with Class 8 ADU and FX500 BDU. Shared documentation does not establish interchangeable hardware.
How it connects
Rev 1.0 describes four LAN ports, including two PoE ports, and separate RJ11 phone/fax interfaces. Match the connector label before troubleshooting; RJ11 is not Ethernet. Preserve the installed configuration.
Lights and messages
- Rev 1.0 describes four LAN ports, including two PoE ports, and separate RJ11 phone/fax interfaces. Match the connector label before troubleshooting; RJ11 is not Ethernet. Preserve the installed configuration.
A light is one clue, not a complete diagnosis. Match the indicator’s label and the on-screen message.
Before buying parts
- Historical manual specifications do not guarantee current service, activation or measured throughput. Confirm account and support eligibility with the provider. Do not swap antenna units, rewire or run billable tests to identify a model.
These are compatibility notes and official reference links. Confirm the fault and exact part before buying.
Model-specific parts: start with the official source
Confirm the exact model and part number with the manufacturer or provider before buying any replacement part or accessory.
Check the model and official instructions ↓