Figure 6-11 Example #3: Vt1.5 Circuit In A Upsr Or 1+1 Protection Scheme - Cisco ONS 15327 User Documentation

Chapter 6 Circuits and Tunnels
If you create VT1.5 circuits on nodes in UPSR or 1+1 protection, an additional STS is used for the
protect path at the source and drop nodes.
When the circuit is completed:
Three of the 24 STSs available for VT1.5 mapping on the XTC card are used (one input and two
•
outputs, one output for the working path and one output for the protect path).
21 STSs are available for VT1.5 circuits.
•

Figure 6-11 Example #3: VT1.5 circuit in a UPSR or 1+1 protection scheme

Source
DS-1
Figure 6-12
is created:
Three more VT1.5-mapped STSs are used.
•
18 STSs are available for VT1.5 circuits.
•
June 2002
VT1.5 circuit #1
XTC Matrices
STS Matrix
VT1.5 Matrix
shows a second VT1.5 circuit that was created using STS-2. When the second VT1.5 circuit
Figure 6-11 shows a VT1.5 circuit at a UPSR source node.
Working
Protect
3 STSs total used
21 STSs available
Cisco ONS 15327 User Documentation, R3.3
Cross-Connect Card Capacities
OC-12
Drop
OC-12
STS
VT1.5
6-17