The XCVT card provides the same STS capability as a standard XC card and also provides VT cross-connection. The XCVT provides non-blocking STS-48 capacity to all of the high-speed slots and non-bidirectional blocking STS-12 capacity to all multi-speed slots. Any STS-1 on any port can be connected to any other port, meaning that the STS cross-connections are non-blocking.The STS-1 switch matrix on the XCVT card consists of 288 bi-directional ports and adds a VT matrix that can manage up to 336 bi-directional VT1.5 ports or the equivalent of a bi-directional STS-12. The VT1.5-level signals can be cross connected, dropped, or rearranged. The TCC+ assigns bandwidth to each slot on a per-STS-1 or per-VT1.5 basis. The switch matrices are fully crosspoint and broadcast supporting.The XCVT card works with the TCC+ card to maintain connections and set up cross-connects within the node. Either the XCVT, XC10G, or XC is required to operate the ONS 15454. You can establish cross-connect (circuit) information through CTC. The TCC+ establishes the proper internal cross-connect information and relays the setup information to the XCVT card.