Page - Intercom and Meet me Conference Pin Codes

Hi, today installed a Switchvox AA300 at a customer site. I configured Page / Intercom option but when we dial the Page number, it starts ringing on all sets instead to going on their speakers. What is the problem? I configured 4 digits extensions.
Second, I have created a Meet Me Conference extension but when We dial this extension, it ask about Pin code. From where we get the pin code and specially for those who will dial out of state through their cell phones or land lines? URGENT RESPONSE REQUESTED…Thank you.