# PCM30 #### GSM PCM30 GSM PCM30 is a telecommunications standard used to transmit multiple voice signals over a single medium. It employs the Pulse Code Modulation (PCM) technique to digitally encode analog voice signals. In PCM30, 30 voice channels are multiplexed into one transmission frame, with each channel allocated its own time slot. Additionally, 2 time slots are used for signaling and synchronization, resulting in a total of 32 time slots per frame. This setup allows efficient and high-quality voice communication in digital networks. --- # 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/standards/pcm30.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.