Hello I purchased the SG250 for a small classroom. I just need it to act as a simple switch when connected to my 4510. I disable Spanning tree and most of the setting, whenever I try to uplink to my 4510 the port errors out.

My company is moving from Avaya to a Cisco VoIP system Currently the executives and their assistants use one  button on a 6 button phone as a aka "Panic button". When the button is pushed it sends a silent emergency alert to security command center....

My company is moving from Avaya to a Cisco VoIP system Currently the executives and their assistants use one  button on a 6 button phone as a aka "Panic button". When the button is pushed it sends a silent emergency alert to security command center....