When I try to create an extension 9000, 8000, 7000 and hit submit it does not take. I do have a 6000 and 6001. Have not tried to 6999. I looked in extensions.conf. Can find nothing showing a range of extensions. While I am moving towards getting time to read The Future of Telephony, can anyone tell me if there is a file somewhere that defines the range of extensions? Also, dicko, sir, if you are reading this, I have a script that prevents extensions from dialing other extensions in a custom context (from-internal-xxx) that you create. Works! Thansks.