In the part where programs that sound 100 and 102 only change the intern number, some of the previous digits in 102 should be a 2, indicating that for that option (2), go to 102. In general, when you give options 1, 2, 3 etc., is usually identified as DISA by Menu or automatic assistant. This should be active. In Nexus as far as I know, the option must be checked at the end of the message, not during it, because it does not take it and if at the end of the message it does not detect any incoming tone (1 or 2 or 3, etc.), it derives to 100 . Cheers.