Dear all ,

Currently i have cisco 1841 router as connected 2 Mbps internet connection in wic 2t serial0 one port.

Last week i bought new 2 Mbps internet line and connected to free wic 2t serial1 port .

But the link was showing down.Again i connected to wic 2t serial0 port,change the configuration, same error continues.

But i installed new wic 2t card ,the new link was working fine.

What is the problem,old wic 2t card is working fine with old 2Mbps connection,new 2 Mbps connection only creating problem.