Specifications

4-23
Cisco ONS 15454 Troubleshooting and Maintenance Guide
November 2001
Chapter 4 Card Reference
XCVT Cross-Connect Card
4.8 XCVT Cross-Connect Card
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 multispeed slots. Any STS-1 on any port can be
connected to any other port, meaning that the STS cross-connections are non blocking.
Figure 4-7 shows the XCVT faceplate and block diagram. Figure 4-8 on page 4-24 shows the
cross-connect matrix.
Figure 4-7 XCVT faceplate and block diagram
The STS-1 switch matrix on the XCVT card consists of 288 bidirectional ports and adds a VT matrix
that can manage up to 336 bidirectional VT1.5 ports or the equivalent of a bidirectional 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.
Input
ports
Output
ports
STS
ASIC1
STS
ASIC2
0
1
2
3
4
5
0
1
2
3
4
5
6
0
1
2
3
4
5
6
7
8
9
10
11
0
1
2
3
4
5
6
7
8
9
10
11
Ports Ports
VT cross-connects go to internal port 5 only, which bridges the signal into the VT ASIC.
Port 5 supports 48 STSs, but only the last 24 STSs map VT-level signals.
61341
VT
ASIC
XCVT
FAIL
33678 12931
ACT/STBY