“dialplan.digitmap.enable” and “account.X.dialplan.digitmap.enable” are set to 0 (Disabled). 
Web User Interface: 
Settings->Dial Plan->Block Out->Account 
Phone User Interface: 
None 
To create a block out rule via web user interface: 
1.  Click on Settings->Dial Plan->Block Out. 
2.  Enter the desired value in the BlockOut NumberX field. 
3.  Enter the desired line ID in the Account field or leave it blank. 
If you leave this field blank or enter 0, the block out rule will apply to all accounts on the 
IP phone. 
 
4.  Click Confirm to add the block out rule. 
Dial Plan using Digit Map String Rules 
Digit maps, described in RFC 3435, are defined by a single string or a list of strings. If a number 
entered matches any string of a digit map, the call is automatically placed. If a number entered 
matches no string - an impossible match - you can specify the phone’s behavior. You can 
specify the digit map timeout, the period of time before the entered number is dialed out. 
You need to know the following basic regular expression syntax when creating new dial plan: 
The timer letter “T” indicates a timer expiry. If “T” is used alone (e.g., 
123T), the default timeout value of 3 will be used. If “T” is not used 
alone (e.g., 123<Tx>, x can be a digit from 0 to 99), a complete 
match occurs when waiting x seconds after inputting 123.