請有經驗的朋友看看I485 case status 的查詢結果

我的４８５遞的時間已經過了CIS網站上公布的時間，所以前幾天打電話去查詢，　結果如下：
Your applicataion/petition remains awaiting review by an officer and you will be notified as soon as a decision is made. The service is waiting for VISA availability. Please check the visa bulletin website to check visa availability dates at www.travel.state.gov
這是什麽意思，我的PD早就到了，　是在name check嗎?
請指點，　謝謝。