What does DOCSIS 3.1 seek first when synchronizing with the CMTS to receive operational information?

DOCSIS 3.1, which stands for Data Over Cable Service Interface Specification, is designed to improve broadband internet speeds and capacity over existing cable networks. When a Cable Modem (CM) synchronizes with the Cable Modem Termination System (CMTS), it first establishes an Orthogonal Frequency Division Multiplexing (OFDM) channel. This OFDM channel is essential because it allows the modem to efficiently use a wide range of frequencies for data transmission.

The PHY Link Channel (PLC) within this OFDM framework is critical for interaction between the CM and CMTS. It provides the necessary operational information such as settings and performance parameters, which are vital for effective communication and service delivery. This synchronization process ensures that the modem can properly configure itself to utilize the available bandwidth and adhere to the specifications of the network.

In contrast, other options do not address the initial synchronization needs in the same way. A static frequency channel for data transfer does not provide the same level of flexibility and efficiency as the OFDM approach. A dedicated fiber-optic connection would not typically be relevant since DOCSIS operates over coaxial cable networks, and an IP multicasting channel for video is not the first step in establishing the necessary communication link for operational data.