It can add a Prefix to Matched Numbers and remove Digits by setting Dial Cuts.
a. '0 1 2 3 4 5 6 7 8 9 * #' : Legal characters.
b. 'x' : Lowercase letter x stands for one legal character.
c. '[sequence]' :To match one character from a sequence. For
example:[0-9]:match one digit from 0 to 9;[23-5*]:match one character
from 2 or 3 or 4 or 5 or *.
d. 'x.' : Match to x,xx,xxx,xxxx, ... ; For example?01.'can match'0'?01'?011'?011111?.
e. '<'dialed':'substituted'>' : Replace dialed with substituted.
For example?'<#:23%>xx<#:23%>',input is '#56#',output is
'23%5623%'
f. 'x,y' : Make outside dial tone after dialing 'x', stop until dialing character 'y'. For example:
'<5,:><:241333>8101', input is '58101',output is
'2413338101'. Besides telephone input 5 will have a dial tone, dial 8
after stopping at.
f. 'T' : Set delay time. After 2 seconds, the phone will set aside a valid number. e.g FXS1|<9:>x.T2|ALLOW
5. Now Save

6. You can resend config if needed