User's Manual
FIRMWARE VERSION 1.0.7.6    HT502 USER MANUAL     Page 39 of 48  
Use # as Dial Key 
Allows users to configure the “#” key as the “Send” (or “Dial”) key. If set to “Yes”, “#” 
will send the number. In this case, this key is essentially equivalent to the “Dial” key. If 
set to “No”, this “#” key can be included as part of number. 
Dial Plan  Dial Plan Rules: 
1. Accept Digits: 1,2,3,4,5,6,7,8,9,0 , *, #, A,a,B,b,C,c,D,d 
2. Grammar: x - any digit from 0-9; 
•   xx+ - at least 2 digits number; 
•   xx. – at least 2 digit number. 
•   ^ - exclude; 
•   [3-5] - any digit of 3, 4, or 5; 
•   [147] - any digit 1, 4, or 7; 
•   <2=011> - replace digit 2 with 011 when dialing 
•  < =1> - add a leading 1 to all numbers dialed, vice versa will 
remove a 1 from the number dialed 
•  | - or 
• Example 1: {[369]11 | 1617xxxxxxx} – Allow 311, 611, 911, and any 11 digit 
numbers with leading digits 1617 
Example 2: {^1900x+ | <=1617>xxxxxxx} – Block any number of leading digits 
1900 and add prefix 1617 for any dialed 7 digit numbers 
• Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} –Allow any combinations of numbers 
with 11 digits which has a leading digit 1, but 5th digit cannot be 0 or 1. Or any length 
of numbers with a minimum of 2 digits beginning with 2, with the leading digit 
replaced with 011. 
3. Default: Outgoing - {x+} 
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 user wishes to dial strings such as *123 to activate voice mail or 
other application provided by service provider. In this case * should be predefined 










