All internal extension begin with "3.." (300, 301, 302, etc). Our Auto-Attendant prompt for the "Billing" extension is "Press 3 for Billing" which rings extension 308. Problem is when anyone dials in and wants to go to an internal extension they have to dial "300", "301", etc and if they hesitate more than 1 second after pressing the 3 digit, they get transferred to extension 308 which is billing. I increased the interdigit timeout, but that didn't help and I am unsure as to how to change this behavior. I recommended that we either change the Auto-Attendant prompt, OR the internal Extensions, but was told either option would cause additional headaches due to reprinting of business cards, etc. Do you have any suggestions or solutions for this?