Maybe I should have been clearer, the Dial Plan was only meant to prevent 
calls to the outside.

I don't have an Autoattendant running. That is a solution to the calls to 
inside.
If an autoattendant is really needed and reachable from outside then the 
trick described below only works as long 
as the users don't tell their longer number to the outside callers.......
(I don't know of a way to limit the lenght of a number you can enter in 
the AA)

To really prevent access from outside when using an autoattendant a 
solution could be to 
put these users on a separate server, seems radical but that way you gain 
control.


Paul
 
>> On 9/15/10 9:15 AM, Michael Picher wrote: 
>>  This of course messes with your digit maps but you could dance 
>> around it if all of the 4 digit extensions started with the same 
number.
>> or make they 5 digits, starting with something that would never be 
dialed.
> 
> in house, we use 4 digit extensions (1000-1999), have assigned 70+ 
> as the conference room extension, so conference rooms that we 
> reachable internally only are 701000 to 701999  (yes, there is an 
> area code 701.. so if someone dials 701xxx and takes 3 second before
> they hit the 7th digit, it will misdial)(
> 

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