What message does the DOCSIS 3.1 modem send after synchronization to the CMTS?

After the DOCSIS 3.1 modem has achieved synchronization with the Cable Modem Termination System (CMTS), it sends a Bonded Initial Ranging Request message. This specific message plays a crucial role in the process of establishing and maintaining a stable connection between the modem and the CMTS.

In the context of DOCSIS, ranging involves adjusting the timing of the upstream signal to ensure it is properly aligned with the signals from other devices. The Bonded Initial Ranging Request is significant because it provides the modem's parameters and requests the CMTS for upstream channel bonding, allowing the modem to utilize multiple channels for data transmission. This is essential for maximizing throughput and enhancing the overall performance of the broadband connection.

Understanding this process is key for installers and technicians, as it highlights the importance of properly configuring and troubleshooting DOCSIS modems in service scenarios to ensure optimal performance for end-users.