Grandstream Networks HT813 Administration Manual page 35

Sends an early INVITE each time a key is pressed when a user dials a number. Otherwise, only one INVITE is
sent after full number is dialed (user presses Dial Key or after "no key entry timeout" expires).
This option should be used only if there is a SIP proxy is configured and supporting 484 responses
Early Dial
(Incomplete Address). Otherwise, the call will likely be rejected by the proxy (with a 404 Not Found error).
Default is No.
This feature is NOT designed to work with and should NOT be enabled for direct IP-to-IP calling.
Dial Plan
Adds specified prefix to dialed number.
Prefix
Treats "#" as the "Send" (or "Dial") key. If set to "No", this "#" key can be included as part of the dialed
Use # as
number.
Dial Key
Default is Yes.
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;
1. xx+ – at least 2 digits number;
2. xx – exactly 2 digits number;
3. ^ – exclude;
4. . – wildcard, matches one or more characters
5. [3-5] – any digit of 3, 4, or 5;
6. [147] – any digit 1, 4, or 7;
7. <2=011> – replace digit 2 with 011 when dialing
8. < =1> – add a leading 1 to all numbers dialed, vice versa will remove a 1 from the number dialed
9. | – or
Dial Plan
Example 1: {[369]11 | 1617xxxxxxx} –
Allow 311, 611, 911, and any 10-digit numbers of leading digits 1617
Example 2: {^1900x+ | <=1617>xxxxxxx} –
Block any number with leading digits 1900 and add prefix 1617 for any dialed 7-digit numbers
Example 3: {1xxx[2-9]xxxxxx | <2=011>x+} –
Allow any length of number with leading digit 2 and 10 digit-numbers of leading digit 1 and leading
exchange number between 2 and 9; If leading digit is 2, replace leading digit 2 with 011 before dialing.
1. 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 }