Technical Support
https://www.juniper.net/support/requesting-support.html
How to Configure NFX350
https://www.juniper.net/documentation/en_US/release-independent/junos/information-products/pathway-pages/nfx-series/product/
NFX350 Hardware Guide
Supported Transceivers
https://apps.juniper.net/hct/product/#prd=NFX350