In that case you will wait roughly 3-4 months until you're notified via email or snail mail that you have an interview date.
We waited 135 days from the date DHL delivered the application from NVC to interview at CD Juarez. Status remained "Ready" this entire time and only changed to "Application Received" on the day of the interview. We didn't get an email as they sent notification to my home in the US. Luckily we called the consulate and found out we were scheduled 2 weeks prior.