Originally Posted by BCSteve
RMerlin... could I ask how you knew about the telnet command? Is there a list somewhere for what settings, etc, are available via telnet on this router?
I know about it because I have been developing a custom firmware for the RT-N66U and RT-AC66U for the past year, so I'm fairly familiar with the source code. Toggling the state of the SIP helper is something I have added to my webui a few months ago, specifically for the issue described here.