we have many support querys like "no CAN-communication possible"

cases the solution is very simple: The network is not terminated

the network is terminated

Please take also a look at wikipedia (for highspeed or ISO 11898-2 based systems)
international
http://en.wikipedia.org/wiki/CAN-bus -> Physical Layer
german
http://de.wikipedia.org/wiki/Controller_Area_Network -> Topologie
thanks
Gunther