With IPHost Network Monitor you can run simple snmp requests against a Nortel device in your network.
vctDnaIncHighPriorityReverseCharge
VC Tester Dna Inc High Priority Reverse Charge
1.3.6.1.4.1.562.2.4.1.5130.2.12.1.2
This attribute, if set to a value of allowed indicates that incoming high priority, reverse charged calls (from the network to the DTE) can be made to this Dna. If set to a value of disallowed,then such calls cannot be made to this Dna - such calls will be cleared by the local DCE. This attribute, together with the incNormalPriorityReverseChargeCalls attribute corresponds to the ITU-T 'Reverse Charging Acceptance' feature for Dna's in that reverse charged calls are accepted if both attributes are set to a value of allowed. This attribute is ignored if the corresponding attribute, incCalls is set to a value of disallowed.
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IPHost Network monitor allows you to monitor vctDnaIncHighPriorityReverseCharge 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 modems right now.