Just moved to 3CX but we have a mix of 3 digit and 4 digit extensions. We set 3CX up as 4 digit and have changed all users to add a 0 to the end of their 3 digit extension. Since business cards etc are all the 3 digit, I'm wondering if we have any other way to route these calls? In Asterisk when doing an IVR, you aren't limited to "What does 1 do, 2 do 3 do etc" you type in "If user presses 1 do this" so you can also set it so if a user on the IVR types in "372" it will go to extension 3720 etc. Are there any options like that or ways I can set it so that if a user calls the main IVR they can still dial by a 3 digit extension? If not I think I might just change the main menu IVR to say "Press 1 if you know the persons extension" and then when they press 1 it will say "Please note that all extensions are 4 digits in length. If the person you are trying to reach has a 3 digit extension, you must add 0 to the end of their current extension."