I have been testing 2610 and 2611 routers (The only connection is through console port and ethernet to the TFTP server). The routers recognize all the Ethernet and WAN interfaces. The ethernet LED is OK but the WAN cards LED are off as there are unconnected.I have configured the interfaces of these WAN cards(A BRI port and SERIAL port) with IP address, when i use the command Show interface i can see all the interfaces are UP and line protocol is UP. Is this enough to testify that the WAN cards are GOOD or is there any other technical way to test these modules. Does it need to connect all these WAN cards and PING them or is there a command which will be enough to prove that the WAN cards are all GOOD and not FAULTY.