This probably beongs in a different thread, but here goes anyway:
*xx. Allow * followed by one digit, then by one or more digits. This gives access to all of CallCentric's Star Codes.
*123 Allow * followed by 123 (voicemail). The *xx. would also allow this!
**275*x. Allow any number of digits starting with **275* This gives access via the SIPBroker network.
11 Allow 311, 411, 611, 911 If you are not using this service provider for 911, then I would delete the "9" to avoid 911 calls routing this way by accident.
1xxxxxxxxxx Allow eleven digit numbers starting with "1".
<1 Your Area Code>[2-9]xxxxxx Allow any seven digit number starting with digits 2 throught to 9, then prepend "1" and your area code.
<1>[2-9]xxxxxxxxx Allow any ten digit number starting with digits 2 through to 9, then prepend "1".
011xx. Allow any number of digits starting with 011 (international calls).
xx. Allow any digit followed by any number of digits. This is a "catch-all" rule for any number that does not match any other rules.
(Mipd) User Defined DigitMap that allows SIP URI dialling from a telephone key pad. Does anyone ever use this?
[^*]@@. Allow any alphanumeric character except * followed by any number of any alphanumeric characters. Used for SIP URI dialling from speed dials etc. A better rule is [^*]@@.'@'@@.
I recommend deleting any rules that you will never use. Rules such as xx. and [^*]@@. accept any number as far as digits are concerned and can cause confusion.