First thanks for the reply.
When the main number is dialled it goes to the AutoAttendant and there are 9 options. The first 8 options are directed at extension numbers and the last one is an option to hear the message again.
Should one of these be directed to another service to allow for entering an extension number if known, if so how is it done. You lost me when you started talking about pilot numbers, not heard that term before. All I'm wanting to do is for anyone dialling in to the main number that does not have a DDI for the recipient of the call can use their extension number upon request. Hope that makes sense