Today I had an issue with a number of pcs in a new medical office. The ip guy called me to say he was losing network conectivity with some of his pcs. I went to the site and tested the cables and network ports with my RWC. It told me that my cables all passed for gigabit speed but that there was a problem negotiating with the Dell managed gig switches. After a call to Dell support, the solution turned out to be a setting on both ends, a nic option as well as a switch option. We had to turn IEEE settings off. This is the energy efficient ethernet option which turns the nic and the switch port off after a time of inactivity. This causes the connection to drop and a problem with auto negotiation when the pc tries to reconnect. My inexpensive certifier saved me a lot of time by pointing me in the right direction.

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"Old phone guys never die, they just get locked in some closet with an old phone system and forgotten about"

Retired, taking photographs and hoping to fly one of my many kites.