The 500 kV aggregation nodes within the provincial access network are interconnected through 155M POS interfaces. With the continued operation of dispatch services over time, prolonged equipment use had led to varying degrees of wear and damage to key components such as interface boards and optical modules, affecting overall service stability. This project involved the repair of boards and optical modules across the 500 kV aggregation node equipment in the provincial access network, restoring system functionality and supporting the long-term stable operation of critical services.

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