With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
btdsFramerUsageState
btds Framer Usage State
This attribute indicates the OSI Usage State of the component. The value idle indicates that the component is not currently in use. The value active indicates that the component is in use and has spare capacity to provide for additional users. The value busy indicates that the component is in use and has no spare operating capacity for additional users at this time.
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IPHost Network monitor allows you to monitor btdsFramerUsageState on Allied Telesis device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Nortel speech servers right now.