[Asterisk-Users] How to determine the voicemail file name for an AGI script

[Bryan Boatright]

I've read several of the Wiki sections on Voicemail and "Asterisk 
variables" but could not find an obvious answer to this question.

I would like to run a script that post-processes the voicemail after the 
Voicemail application returns (with AGI or DeadAGI), but I cannot figure 
out how to easily determine the name of the file written by the 
Voicemail application.  Does anyone know of an efficient way to access 
that information from within the dialplan so that it may be passed to 
the AGI script?

Thanks for your help,
Bryan