I would agree, more information is needed.
Have you tried dialing out on at least one of them with analog phone or butt set to see if you can dial out on the trunks. This eliminates a trunk issue.
If trunks work, then you are down to the hardware either having an issue, or programming. I'd isolate one trunk and start doing some testing on it. When you receive a call, can you send tones to the other end? Can you call internal extension numbers, voicemail, auto attendant, etc. If so, then probably a trunk access issue in programming.