ENV()
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ENV() 

ENV(variablename)

Reads/sets an environment variable (a variable in the operating system environment - these can be viewed from the shell with echo $variablename). Environment variables are case-sensitive and are almost always written all uppercase.

; read HOME:
exten => 123,1,Set(foo=${ENV(HOME)})

; set HOME:
exten => 123,1,Set(ENV(HOME)=/myAst)
[Note]

Internal help for this application in Asterisk 1.4:  

  -= Info about function 'ENV' =- 

[Syntax]
ENV(<envname>)

[Synopsis]
Gets or sets the environment variable specified

[Description]
Not available

diff output to internal help in Asterisk 1.2:  

- none -
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