A file managing apparatus of a switching system includes: a flash memory for storing files used in the switching system: an SRAM for storing the files, which are frequently changed and used, among the files stored in the flash memory; and a central processing unit for storing data in a predetermined...http://www.google.com/patents/US6304883?utm_source=gb-gplus-sharePatent US6304883 - Technique for managing files in telephone switching system
