In the configuration settings under view cur port sett I noticed if you changed port setting you can set the speed to 1000. I tested this by removing the pc behind the phone as my switch is capable of gig ports and rebooted the phone but when I look at the switch it's only 100 and when I look at the current port sett on the phone the LAN port speed is only 100. Can you set these phones to 1000?
