What are the advantages of pre-terminated products in data center applications compared to fusion-spliced optical cable products? Are there any products with substandard quality? What are the advantages of pre-terminated products in data center applications compared to fusion-spliced optical cable products? Are there any products with substandard quality? What are the advantages of pre-terminated products in data center applications compared to fusion-spliced optical cable products? Are there any products with substandard quality?