Here is a log, as you can see all of this happened within about a second
11:31:15 IVM Answering Attendant Engine Started
11:33:56 Ringing on Line Analog Line 1(dxxxB1C1) detected. Waiting until ring number 2.
11:33:56 Analog Line 1(dxxxB1C1) Unavailable [Answered]
11:33:57 Answered line [1 "Analog Line 1(dxxxB1C1)"] call number [0] cid [unavailable] did[Analog Line 1(dxxxB1C1)] drn[0 (5979ms)]
11:33:57 Play file: C:\Documents and Settings\All Users\Application Data\NCH Swift Sound\IVM\OGMs\Default Answering Message.wav
11:33:57 Command - Leave Message
11:33:57 Leave Message for Mailbox: Default
11:33:57 Play system prompt: RecordTone
11:33:57 Recording File: C:\Documents and Settings\All Users\Application Data\NCH Swift Sound\IVM\MailBoxes\Default ICM000001.wav
11:33:58 Recorded message discarded because it was too short (Message length: 0.00 seconds)
11:33:58 Call disconnected