it's CME

ok then you need to do COR list configuration,

for example:

you have these two phones:

ephone 1

button 1:1

cor incoming phone1

ephone 2

button 2:2

cor incoming phone2

COR config:

-----------

dial-peer cor custom

name phone1

name phone2

dial-peer cor list phone1

member phone1

dial-peer cor list phone2

member phone2

then on that dial-peer

dial-peer voice 10 pots

destination-pattern 0

forward 1

port 0/3/0

cor outgoing phone2 <-- will enable only phone2 to call this number

refer to this link for more inforamtion:

http://www.cisco.com/en/US/tech/tk652/tk90/technologies_configuration_example09186a008019d649.shtml#maintask1

please HTH if usefull

Regards

Thank, now I can block the "0" for a specific extension or some extension but I want to do that.

I want by dial "0" that the extension 100 can call all number begining by 2xxxxxxx and 3xxxxxxx and I want that the extension 101 can dial only 3xxxxxxx and no 2xxxxxxx numbers.