Figure 11-4 Two Vt1.5 Circuits In A Blsr - Cisco ONS 15454 Reference Manual

11.3 11.3 Cross-Connect Card Bandwidth
Figure 11-4
Circuits with DS1-14 and DS1N-14 circuit sources or destinations use one STS port on the VT matrix.
Note
Because you can only create 14 VT1.5 circuits from the DS-1 cards, 14 VT1.5s are unused on the VT
matrix.
VT matrix capacity is also affected by SONET protection topology and node position within the circuit
path. Matrix usage is slightly higher for path protection nodes than BLSR and 1+1 nodes. Circuits use
two VT matrix ports at pass-through nodes if VT tunnels and aggregation points are not used. If the
circuit is routed on a VT tunnel or an aggregation point, no VT matrix resources are used.
shows basic STS port usage rates for VT 1.5 circuits.
Cisco ONS 15454 Reference Manual, R7.0.1
11-14
Two VT1.5 Circuits in a BLSR
VT1.5 circuit #1 on STS-1
1 VT1.5 used on STS-1
27 VT1.5s available on STS-1
XCVT/XC10G Matrices
Source
EC-1
VT1.5 circuit #2 on STS-2
1 VT1.5 used on STS-2
27 VT1.5s available on STS-2
VT1.5 circuit #1 on STS-1
1 VT1.5 used on STS-1
27 VT1.5s available on STS-1
XC-VXC-10G Matrices
Source
EC-1
VT1.5 circuit #2 on STS-2
1 VT1.5 used on STS-2
27 VT1.5s available on STS-2
STS Matrix
4 STSs total used
20 STSs available
VT1.5 Matrix
STS Matrix
4 STSs total used
92 STSs available
VT1.5 Matrix
Chapter 11 Circuits and Tunnels
Drop
OC-12
Drop
OC-192
STS
VT1.5
Table 11-5
OL-9217-01