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Cisco ONS 15454 Reference Manual, R7.0
78-17191-01
Chapter 2 Common Control Cards
2.4 2.4.1 XCVT Functionality
Figure 2-3 XCVT Faceplate and Block Diagram
2.4.1 XCVT Functionality
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 TCC2/TCC2P card 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 provides:
• 288 STS bidirectional ports
• 144 STS bidirectional cross-connects
• 672 VT1.5 ports via 24 logical STS ports
• 336 VT1.5 bidirectional cross-connects
• Nonblocking at the STS level
• STS-1/3c/6c/12c/48c cross-connects
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
61341
VT
ASIC
XCVT
FAIL
33678 12931
ACT/STBY