Sounds like it could be a voice port gone bad or possibly a hard drive problem on the MLM 007. Most often, it is the hard drives on these systems that fails. More rarely, a motherboard or voice port issue. There is a built-in test of the hard drive and voice ports that you can perform by logging through the RS-232 port. There is a previous post of mine discussing a Merlin Mail system that explains the "how to" process. Once logged in, choose "Shut Down Mail system" - once the system shuts down, choose "Test Voice Ports", the choose "Hard Drive Test". Report back any results.
Tom Daugirdas,
President
STCG, Inc.
stcg.com