I'm confused about Selector codes. The book has the range of extensions for selector code 1 as 10-19, 20-29 for selector code 2, et cetera. What is the relationship between selector codes and range of extensions? I have a client with a Partner II, he has enough 206 modules to go out to extension 51. If I want to use Direct extension transfer for all extensions, does that mean that the first selector code I can use for selector code transfer is 6?