Three Fundamental Reasons To Skip 25G PON MSA
First, 25G PON MSA is not an industry standard, and there is nothing multi-source about it. A single, vertically integrated vendor controls the 25G PON MSA main PON component supply—and since the supply chain is a single source, it can be prioritized to meet the vendor's needs over others. Given past dynamics in supply shortages, this is the last thing BSPs should worry about when deploying new technology. Additionally, the emergence of 50G PON technology with higher bandwidth and better cost efficiency has made 25G PON less attractive.
Second, with 21 Gbps of payload capacity, 25G PON MSA is insufficient to meet the needs of upcoming use case drivers over the next decade. The chart below compares services type versus PON technologies, demonstrating that 10G PON, specifically XGS-PON, meets the demands of residential, small business, and aggregation for the foreseeable future. Future applications requiring capacity beyond 10G—service convergence for private networks, large companies, wireless, and mobile networks aggregation—require a higher capacity than 25G PON can deliver. For instance, Wi-Fi 7 access point transport supports peak throughput rates of over 40 Gbps. Deploying a technology that runs out of gas for its primary use case makes no sense. As a result, the industry focus has shifted towards 50G PON.
Figure 1: Service and PON Technology Assessment
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