# A-ter interface Connection between BTS and BSC 16 kbps 32 channels #### A-ter Interface The A-ter interface is used to connect the BTS (Base Transceiver Station) to the BSC (Base Station Controller). It operates at a standard rate of 16 kbps per channel, with the capability of handling up to 32 channels. This interface facilitates the communication and control signals transmitted between BTS and BSC, ensuring efficient management and coordination of mobile network operations. --- # 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://gsm.learn-telecom.com/gsm-interfaces/a-ter-interface.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.