I don't believe that the code 900 can be dialed in the US as an area or exchange code. This code was once reserved for very expensive pay-per-call services, such as porn and sports betting. Because of the horrible billing issues and abuse, I'm pretty sure this code was retired from service. Are you sure that this is a legitimate number? I tried dialing several variations from here using several different types of lines and providers with the same result, which was failure of the call.

Yes, when day 100 arrives, the oldest messages will start to get discarded. As for the maximum count, once the 250th has been reached, subsequent attempts to leave a message will receive a message indicating that the mailbox is full. Keep in mind that all of these counts are limited by the number of hours of storage that your system has.

As for the question about downloading voice mail messages, there are many utilities like that that can only be accessed via the system's serial port. That's outside of the scope of support that we can provide here.

Ed Vaughn, MBSWWYPBX