Vt Mapping; Figure 2-4 Xcvt Cross-Connect Matrix; Table 2-13 Vt Mapping - Cisco 15454-DS1-14= - 1.544Mbps Expansion Module Reference Manual

Chapter 2 Common Control Cards
The XCVT card works with the TCC2/TCC2P cards to maintain connections and set up cross-connects
within the node. The cross-connect cards (such as the XCVT and XC10G), installed in Slots 8 and 10,
are required to operate the ONS 15454. You can establish cross-connect (circuit) information through
CTC. The TCC2/TCC2P cards establish the proper internal cross-connect information and relay the
setup information to the XCVT card.
Do not operate the ONS 15454 with only one cross-connect card. Two cross-connect cards of the same
Caution
type (two XCVT or two XC10G cards) must always be installed.
Figure 2-4
Figure 2-4
STS-12
STS-12/48

2.4.2 VT Mapping

The VT structure is designed to transport and switch payloads below the DS-3 rate. The ONS 15454
performs VT mapping according to Telcordia GR-253-CORE standards.
numbering scheme for the ONS 15454 as it relates to the Telcordia standard.
Table 2-13
ONS 15454 VT Number
VT1
VT2
VT3
VT4
VT5
VT6
VT7
VT8
78-18106-01
shows the cross-connect matrix.
XCVT Cross-Connect Matrix
XCVT STS-1 Cross-connect ASIC (288x288 STS-1)
Input Ports
1
8X
2
3
4
5
4X
VT 1.5 Cross-connect ASIC
VTXC
336 bidirectional VT 1.5 cross-connects
VT Mapping
Output Ports
1
2
3
4
5
6
Telcordia Group/VT Number
Group1/VT1
Group2/VT1
Group3/VT1
Group4/VT1
Group5/VT1
Group6/VT1
Group7/VT1
Group1/VT2
Cisco ONS 15454 Reference Manual, R8.5
2.4.2 VT Mapping
8X
STS-12
4X
STS-12/48
Table 2-13 shows the VT
2-17