To verify your TCC connection, use the show connections command on Router B:
user@router_b> show connections
CCC and TCC connections [Link Monitoring On] Legend for status (St) Legend for connection types UN -- uninitialized if-sw: interface switching NP -- not present rmt-if: remote interface switching WE -- wrong encapsulation lsp-sw: LSP switching DS -- disabled Dn -- down Legend for circuit types -> -- only outbound conn is up intf -- interface <- -- only inbound conn is up tlsp -- transmit LSP Up -- operational rlsp -- receive LSP Connection/Circuit Type St Time last up # Up trans PPP-to-ATM if-sw Up Nov 30 08:57:53 1 at-1/1/0.32 intf Up so-0/0/0.0 intf Up