In order to setup the system to use sound files in a different language (e.g. Spanish):

Interface setup:

• Navigate to 'Settings: Protocols: SIP'
• Set 'Language'='es' (NOTE: This field must be limited to 2 (two) letters)
• Click on the 'Save' button

Directory setup:

• Login to the system via shell as a root user
• Execute 'cd /home/servers/pbxware/pw/var/lib/asterisk/sounds'
• Execute 'mkdir es'
• Execute 'mkdir ./digits/es'
• Execute mkdir ./letters/es'

Provide sound files:

• Obtain system Spanish sound files
  
• Extract them and put them in the created 'es' directories

• Restart the system from the interface
  

NOTE: If the Spanish sound file is not found in the 'es' directories, the default system sound file in English will be played back