The access point configuration is stored as a text file of CLI commands. This file can be exported out from the device GUI or CLI, and also imported into the device to replace all the running configuration at one go.
Fromt the GUI: use the 'Export' and 'Import' buttons under 'Operations'. You can upload/download the files through your browser, no separate server is necessary.
From the CLI: You can export and import configuration from a TFTP/FTP server using the following CLI commands:
cnWest-E400(config)# export config a TFTP or FTP server path (Eg: tftp://1.2.3.4/config.txt, ftp://user:pass@1.2.3.4/config.txt) cnWest-E400(config)# import config a TFTP or FTP server path (Eg: tftp://1.2.3.4/config.txt, ftp://user:pass@1.2.3.4/config.txt) cnWest-E400(config)#