We are trying to get a 10Mbps circuit up and running from our Telco company. They have installed a Fujitsu Flashwave 4020 at our remote site and have other equipment at our data center. The techs at the telco tell us that the fujitsu is set at 10Mbps full duplex, no auto negotiate.

The problem we are having is that we try to connect the gig port of a Cisco 2821 router to the LAN port of the Fujitsu at the settings that our telco tells us but it does not connect. The telco tells us to connect at 10Mbps full duplex. But whenever we try that setting, the link goes down. If we set the router port to 10Mbps auto duplex the link will come up at 10/half. However we will get duplex mismatch errors and late collision errors across the link.

The other end seems to connect fine. We are connecting a 6509 FastEthernet port to the telco equipment. I don't know what type of equipment it is. They are just handing off an RJ45 jack to us at that end.

Any help would be appreciated.