User's Manual
Grandstream Networks, Inc. GXV3175 USER MANUAL  Page 52 of 60 
 FIRMWARE VERSION 1.0.1.1 Updated : 3/2012 
a)  xx+ - at least 2 digit numbers 
b)  xx. - only 2 digit numbers 
c) ^ - exclude 
d)  [3-5] - any digit of 3, 4, or 5 
e)  [147] - any digit of 1, 4, or 7 
f)  <2=011> - replace digit 2 with 011 when dialing 
g)  | - the OR operand 
• Example 1: {[369]11 | 1617xxxxxxx} 
Allow 311, 611, and 911 or any 10 digit numbers with leading digits 1617 
• Example 2: {^1900x+ | <=1617>xxxxxxx} 
Block any number of leading digits 1900 or add prefix 1617 for any dialed 7 
digit 
numbers 
• Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} 
Allows any number with leading digit 1 followed by a 3 digit number, followed 
by any number between 2 and 9, followed by any 7 digit number OR Allows 
any length of numbers with leading digit 2, replacing the 2 with 011 when 
dialed. 
3. Default: Outgoing – {x+} 
Allow any length of numbers. 
Example of a simple dial plan used in a Home/Office in the US: 
{ ^1900x. | <=1617>[2-9]xxxxxx | 1[2-9]xx[2-9]xxxxxx | 011[2-9]x. | [3469]11 }
Explanation of example rule (reading from left to right): 
• ^1900x. - prevents dialing any number started with 1900 
• <=1617>[2-9]xxxxxx - allows dialing to local area code (617) numbers by 
dialing 
7 numbers and 1617 area code will be added automatically 
• 1[2-9]xx[2-9]xxxxxx |- allows dialing to any US/Canada Number with 11 
digits 
length 
• 011[2-9]x. - allows international calls starting with 011 
• [3469]11 - allow dialing special and emergency numbers 311, 411, 611 and 
911 
NOTE: In some cases where the user wishes to dial strings such as *123 to 
activate voice mail or other applications provided by their service provider, 
the * should be predefined inside the dial plan feature. An example dial plan 
will be: { *x+ } which allows the user to dial * followed by any length of 










