Thanks Tommy. Another question relating to this...

When the auto-attendant picks up and the person calling in dials the extension of person, I noticed the phone just keeps ringing and doesn't go to voicemail. However, if you call the extension directly via DID or from an internal phone extension, it does go to voicemail.

Here's another piece of the puzzle... the extensions that this odd behavior is happening to are not directly connected to the system. They are remote systems that are connected to the central system via modem or other telephony means. All extensions connected locally to the central system are not having this issue.

Any thoughts why it wouldn't go to voicemail when being transfered from the auto-attendant for the remote extensions?