We have a remote site connected back via fiber to the main building. They have a S8300 Avaya IP phone switch that supports their phones. The s8300 is connected to the main building's S8700 ip phone swith. The S8700 is the main phone switch. When the drop in connectivity occurs the S8300 goes into LSP mode. I think that we have an issue with either BPDU guard causing the lose in connectivity or spanning tree. We removed the loopguard to all ports. Thank you.