Can you integrate third party AA and voicemail with CME?

can I integrate a 3rd party Automated Attendant and Voice mail to communicate with my Call manager Express router? I tried looking at the Prices for the AIM-ATM-VOICE and cisco CUE. And It is so expensive I cannot afford it. Any third Party voice mail can be be plugged into my switch would be great!! 


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Comments
The Callmanager Solution Reference Network Design document has a section on Third-Party Voicemail Design that could fill in some of the background information for you -- but on a much larger scale then you'd deal with when using CME.