I have an IPO 406 running 5.0 (26) & VMPro at 5.0 (30). The problem that I am experiencing is that whenever a caller calls the line and either disconnects in the middle of the greeting or leaves a VM, the system doesn't disconnect when it is supposed to. I have read some threads on enabling Disconnect Clears & played around with the timers & Busy Tone Detection and no luck at all. Called Verizon a few times & they indicated that they don't know what disco. clears are or that it doesn't exist on digital lines (which I find it rather odd because the system worked with their competitor and used a digital line before switching over). So to make a long story short & in other words: S. O. S.!