Good day, The 3CX would have to support a prefix of 0 as usual for PBXs. This is however unfortunately only outgoing ... with incoming calls the 0 is not registered in the call list. Also the 3CX client can not process this and under the HotKey function one would have to register it so that is chosen. This whole becomes problematic, if the local area still has a 3-digit number range and also the extensions in the 3CX 3-digit numbers have! Thus, a call to a location number, eg 256, and a set-up subscriber number 256, is no longer possible !! This would be urgently needed by 3CX !!!