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Cisco ASA Series CLI Configuration Guide
 
Chapter 1      Using the Command-Line Interface
  Supported Character Sets
Supported Character Sets
The ASA CLI currently supports UTF-8 encoding only. UTF-8 is the particular encoding scheme for 
Unicode symbols, and has been designed to be compatible with an ASCII subset of symbols. ASCII 
characters are represented in UTF-8 as one-byte characters. All other characters are represented in 
UTF-8 as multibyte symbols. 
The ASCII printable characters (0x20 to 0x7e) are fully supported. The printable ASCII characters are 
the same as ISO 8859-1. UTF-8 is a superset of ISO 8859-1, so the first 256 characters (0-255) are the 
same as ISO 8859-1. The ASA CLI supports up to 255 characters (multibyte characters) of ISO 8859-1.