0406 GMT - AI infrastructure is likely to expand across multiple sites as power and land shortages increasingly constrain data center growth, a Digitimes Intelligence report says. Big technology companies are beginning to connect GPU clusters across nearby campuses with high-speed optical networks, allowing them to function as a single AI system, the report says. Digitimes calls the approach "Scale-Across," which could help cloud-service providers keep adding computing capacity even when power, cooling or land at a single site becomes limited. The shift is expected to boost demand for advanced optical networking, creating opportunities for suppliers like Ciena, Nokia, Cisco and Marvell, the report says.