I have a client that had 9 offices with a IP Office in each office. The extensions are numbered as 1100 (office 1), 1200 (office 2), 1300 (office 3). They just opened a 10th office. I made the ext's 1000X. Has anyone mixed 4 digit ext's with 5 digit ext's in a SCN environment before? The new office is able to dial all of the other branch offices. The existing offices are not able to dial the new office. When the 4th digit is entered the call is initiated before the 5th digit is entered.