August 2017 marks the official End of Support for R77, R77.10, and R77.20.
Now might be an excellent time to upgrade to R80.10
Refer to the Support Life Cycle Policy for additional details.
Above does not apply to the 600/700/1100/1200R/1400 appliances, where R77.20 is the current major version.
EOS for embedded R77.20 has been pushed from 05/19 to 05/20.