With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vncsVpSilenceSuppressionFactor
vncs Vp Silence Suppression Factor
1.3.6.1.4.1.562.2.4.1.44.3.3.1.8
This attribute specifies the expected savings (percent reduction) in required bandwidth if silence suppression is used. If silence suppression is used, the bandwidth required for the connection will be lower than if silence suppression is not used. However, the routing system will not be aware of the unused bandwidth unless that bandwidth is specified by this attribute. If the value specified for the expected savings is too low, then some bandwidth made available by the use of silence suppression will be wasted. If the value specified for the expected savings is too high, then some connections may fail to set up because the routing system will over-calculate the amount of bandwidth available. The effectiveness of silence suppression can be influenced by language related speech patterns.
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IPHost Network monitor allows you to monitor vncsVpSilenceSuppressionFactor 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 switches right now.