With IPHost Network Monitor you can run simple snmp requests against a Cisco device in your network.
xdsl2LConfProfTargetSnrmUs
xdsl2 L Config Prof Target Snrm Us
1.3.6.1.4.1.2011.2.25.251.1.5.1.2.1.17
The minimum Noise Margin the xTU-C receiver shall achieve, relative to the BER requirement for each of the upstream bearer channels, to successfully complete initialization. The target noise margin ranges from 0 to 310 units of 0.1 dB (physical values are 0 to 31 dB).
Back to VDSL2-LINE-MIB MIB page.
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