I appreicate all the answers

The phone system is up and running, it has modules installed. THere are about 7 lines and 7 phones each phone has a direct number through the pbx and also we can transfer using extensions. What we would like to have is the system pick it up and say if u know your extension dial it now and also each extension to have voicemail. PLease let me know if its possible and maybe if you need more info and the unit. Thanks a lot!!!!!