KEYPADHASH()
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KEYPADHASH() 

KEYPADHASH(string)

Transforms an alphabetical string to digits according to the standard telephone keypad letter assignments. This enables quick conversion of vanity numbers (e.g. 1-800-BADHAIR (1-800-2234247) to actual numbers.

1 2 ABC 3 DEF
4 GHI 5 JKL 6 MNO
7 PQRS 8 TUV 9 WXYZ
* 0 # 
exten => 123,1,Set(foo=${KEYPADHASH(BADHAIR)})  ; returns 2234247
[Note]

Internal help for this application in Asterisk 1.4:  

  -= Info about function 'KEYPADHASH' =- 

[Syntax]
KEYPADHASH(<string>)

[Synopsis]
Hash the letters in the string into the equivalent keypad numbers.

[Description]
Example:  ${KEYPADHASH(Les)} returns "537"

diff output to internal help in Asterisk 1.2:  

-- not available in Version 1.2 --
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