Excuse my ignorance, I inherited this position and am slowing learning. We have a definity switch which is programed to automatically dial a number when a 4 digit extension is dialed. For example, from a phone connected to the switch I dial 1234, it is my understanding that the switch is set up to automatically recognize that that extension 1234 is at another branch location, it then dials the full 10 digit number, for example it appends 1-999-999 to the 1234. Our switches are not linked and do not know about each other. Recently we had one location that has had an area code change and as a result this 4-digit dialing no longer works. My question is what is this automatic addition called and where would it be changed within the switch? I have spent all morning searching avaya's website but I don't think I even know what I am looking for because I am not certain I know the nomenclature of what exactly the switch is doing. Thanks for any help anyone can provide.