I am able to monitor the 541N with SNMP, however the System Contact and System Location that I set on the system does not show up. When I query the device it returns "Unknown" and Unknown as the system contact and location. I have been awaiting a firmware update to see if it corrects the problem but there has not been a release since January 10. This seems like a small inconvenience but our monitoring system queues off of these two values to generate alerts and collect information and without it we cannot continue large scal deployment of these devices.
There is a new firmware version that has recently been released over the past week or so. The latest version is 1.9.0. I don't see anything in the Release Notes that appear to address your issue directly but it would be worth an upgrade to see if it corrects your issue as well. You can find the 1.9.0 version here.
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