Convert Call to DTMF VOIP

The Call DB0WML in DTMF Tones:

312200916153

Explanation:

DB0WML
312200916153

Zurueck

Convertion according to Table:

first digit
second digit
0 1 2 3 4
1 1        
2 2 A B C  
3 3 D E F  
4 4 G H I  
5 5 J K L  
6 6 M N O  
7 7 P Q R S
8 8 T U V  
9 9 W X Y Z
0 0        
Source

Everything without warranty
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