The new VIAVI ONT-800 Family of optical transport test equipment provides a wide range of critical test and measurement capabilities that manufacturers need to design and launch networking products.  Built on the ONT-600, the ONT-800 was purpose built to test 400G technologies and beyond.  Its advanced test applications and comprehensive optical transport technology coverage include 400GE PAM-4, PHY, PCS and Ethernet layers, and up to 800G Flexible Services.  The ONT-800 mainframe paired with the 800G FLEX module gives manufacturers and service providers an advantage when enabling emerging technologies.

https://www.viavisolutions.com/en-uk/products/ont-800-optical-network-testers