18.1.1.0007 typically refers to a specific build or maintenance release of software.
In networking firmware, "PVP" often stands for Public Version or a specific Patch package. 18.1.1.0007-PVP.rar
If you did not download this from an (like ZTE Support), be extremely cautious: 18.1.1.0007-PVP.rar
If you can share the brand of the device or the website where you found this file, I can help you find the specific installation instructions or release notes. 18.1.1.0007-PVP.rar
Software used to configure and update optical network units. ⚠️ Security Warning