# BBO gateways BBO gateway uses Ethernet interface to communicate with Boomerang 3 server and works as a communication channel between its sensors and/or interfaces and the Boomerang system. There are the following BBO gateways: 1. XBB006 BBO 1-Wire gateway 2. XBB012 BBO gateway with 8 x 4-20 mA channels 3. XBB021 BBO gateway with 16 x 0-10 V channels --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://help.boomerang3.com/bbo-gateway-installation-manual/bbo-gateways.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.