I have a callpilot 4.0 on a 201i platform. When looking at the system monitor, and I make a call into the callpilot I will grab a channel and a mpu. When I hang up the call the channel will drop, But the mpu is held up for about 15 to 20 seconds. This is fine until very busy times in the system. We are having situations where there are several channels avaliable but no mpu's. Has anyone else run into this issue?