[Asterisk-Users] Weird Issue: Call will not go into VM

[Jake at lists.digium.com]

Weird Problem:  I have 2 EXT. One will ring and NOT go into VM 
(eventually call will timeout/hang up), the other EXT goes into VM when 
the call is not answered like it should. If I enable DND, then the call 
will go directly in VM as it should.

Any ideas what it might be?

Thank you,
Jake