Cisco ONS 15454 - VT Mapping; Figure 2-8 XC-VXC-10 G Cross-Connect Matrix; Table 2-18 VT Mapping

2-25
Cisco ONS 15454 Reference Manual, R7.0.1
OL-9217-01
Chapter 2 Common Control Cards
2.6 2.6.2 VT Mapping
Figure 2-8 XC-VXC-10G Cross-Connect Matrix
2.6.2 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. Table 2-16 shows the VT
numbering scheme for the ONS 15454 as it relates to the Telcordia standard.
1
2
.
.
.
.
20
Input Ports
Output Ports
4X
STS-192
8X
STS-48
8X
STS-48
4X
STS-192
XC-XVC-10G STS-1 Cross-connect ASIC (1152x1152 STS-1)
VT 1.5/VT 2 Cross-connect ASIC
TU-3 Cross-connect ASIC
(bypassed in SONETmode)
6X STS-48
2X STS-48 (VT Ports)
2X STS-48 (VT Ports)
1344 bidirectional VT 1.5 cross-connects, or
1008 bidirectional VT 2 cross-connects, or
Mixed grooming (50% VT1.5 and 50% VT2)
1
2
.
.
.
.
20
VTXC
TUXC
134272
Table 2-18 VT Mapping
ONS 15454 VT Number Telcordia Group/VT Number
VT1 Group1/VT1
VT2 Group2/VT1
VT3 Group3/VT1
VT4 Group4/VT1
VT5 Group5/VT1
VT6 Group6/VT1
VT7 Group7/VT1
VT8 Group1/VT2
VT9 Group2/VT2
VT10 Group3/VT2
VT11 Group4/VT2
VT12 Group5/VT2
VT13 Group6/VT2