Dial plan for differente length for differente prefixes

[acrz6666]

Hello.

I have a Yealing SIP-T28P. I want to configure it so when I dial a number for which its length is known (depending on the prefix) the phone do not wait the inter digit time (default = 4 seconds) and inmediately sends the number (minimum time out for dial-now rule is 1 seconds; I would prefer it was 0 seconds).

If you have diferent lengths starting with a common prefix, you have to specify those different prefixes going longer than the common prefix. For example, in my country all numbers starting with 0 have a length of 3 digits, except 00 (international code prefix) and 067 (for hiding my telephone number). I have configured the next rules:

067xxxxxxxxxxxxxxx
0[1-9]x

No rule for 00 as the length might be variable.

067 also has a variable length, so I include that rule with 13 digits after the prefix 067, supposing I will never dial a number longer than this amount of digits.

My question is:
Is there a better way to represent a number when you do not know the number of digits? I have seen that with Linksys x. means any amount of digits.

On other side, is it possible to reduce the time out for dial-now rule to 0 seconds? I do not see the benefit of waiting one second.

Thanks.