Vt Mapping; Figure 13-4 Cross-Connect Matrix; Table 13-1 Ons 15327 Vt Mapping - Cisco ONS 15327 User Documentation

XTC Cards (XTC-28-3/XTC-14)

Figure 13-4 Cross-connect matrix

STS-12/48
Cross-connect matrix at VT level = 336x336 bidirectional VT 1.5 bandwidth manager
The XTC card supports a total of 672 cross-connects with a payload granularity of VT 1.5. The VT
functionality supports ring configurations with a mix of VT-capable Cisco transport network elements
(NEs) and STS-only capable Cisco transport NEs.
The XTC card provides protection switching control for external and internal VT paths. The card also
performs path- and STS-level monitoring and protection switching.

13.3.2 VT Mapping

The Cisco ONS 15327 performs VT mapping according to Telcordia GR-253 standards.
shows the VT numbering scheme for the ONS 15327 as it relates to the Telcordia standard.

Table 13-1 ONS 15327 VT mapping

ONS 15327 VT Number
VT1
VT2
VT3
VT4
Cisco ONS 15327 User Documentation, R3.3
13-6
Cross-connect matrix at STS level = 288x288 STS-1
Ports
STS
8X
ASIC1
STS-12
4X
Ports
STS
ASIC1
0 0 Ports
1 1
STS
ASIC2
2 2
3 3
4 4
5 5
6
VT
ASIC
Ports
0 0
1 1
STS
ASIC2
2 2
3 3
4 4
5 5
6
VT
= Possible
ASIC
paths of VT
level signal
Telcordia Group/VT Number
Group1/VT1
Group2/VT1
Group3/VT1
Group4/VT1
Chapter 13 Card Reference
8X
STS-12
4X
STS-12/48
Table 13-1
June 2002