Jitesh
I believe that the symptoms that you describe may be caused by this line in the configuration:
isdn tei-negotiation first-call
when this is configured layer 2 is activated and TEI is negotiated when a call is made rather than at power-up. I believe what you are talking about indicates that only the first channel has actively made a call. If the second channel made a call I believe that it would show up.
I believe the fact that only one channel shows up at this time is not an indication that there is any problem with the second channel.
HTH
Rick
HTH
Rick