(usr-tc) Lost NMC Stop accounting

Hi, anybody does/did experience this annoying accounting error? About 10% of our total calls have ARC Start, NMC Start, ARC Stop accounting packets and no NMC Stop packet. Percentage seems to increase with the number of calls. Scenario: 3COM TotalControl 1000 with SteelBelted Radius, radius does not matter since the NMC does not send the Stop packet. Any idea is welcome, thanks in advance. - To unsubscribe to usr-tc, send an email to "majordomo@xmission.com" with "unsubscribe usr-tc" in the body of the message. For information on digests or retrieving files and old messages send "help" to the same address. Do not use quotes in your message.