We are using all Aastra 6337i and 6757i telephones on a FreePBX box running Asterisk 11 and we would like to be able to see when someone is using DND. If possible, we would like the light to flash for anyone that is using DND. For example: Extension 101 presses his DND button. All other extensions that have his name as a BLF in their phone show a flashing red light signaling that extension 101 is now in DND mode. Is this possible and how do I accomplish this?