The ENH500v1 does not support CLI on firmware version 1.1.11 or older. CLI support for the ENH500v1 has been added starting on firmware version 1.3.5.
The CLI feature can be enabled or disabled by going to the CLI Settings found in the ENH500v1 graphical user interface (GUI).
1. Access the ENH500v1 GUI and click on CLI Settings under Management.
2. Select "On" and click on Save/Apply to enable CLI access.