Table of Contents
Advertisement
Cross-Connect Card Capacities
Table 6-3
Card
XC
XCVT
XC10G
6.8.1 VT1.5 Cross-Connects
XCVTs and XC10Gs can map up to 24 STSs for VT1.5 traffic. Because one STS can carry 28 VT1.5s,
the XCVT and XC10G cards can terminate up to 672 VT1.5s, or 336 VT1.5 cross-connects. However,
to terminate 336 VT1.5 cross-connects:
•
•
Table 6-4
VT1.5-mapped STS carries 28 VT1.5 circuits.
Table 6-4
Card
XC
XCVT
XC10G
Figure 6-9
at a BLSR node. The circuit source is an EC-1 card using STS-1. After the circuit is created:
•
•
•
Cisco ONS 15454 Installation and Operations Guide
6-16
XC, XCVT, and XC10G Card STS Cross-Connect Capacities
Total STSs
STS Cross-connects
288
144
288
144
1152
576
Each STS mapped for VT1.5 traffic must carry 28 VT1.5 circuits. If you assign each VT1.5 circuit
to a different STS, the XCVT and XC10G VT1.5 cross-connect capacity will be reached after you
create 12 VT1.5 circuits.
ONS 15454s must be in a bidirectional line switched ring (BLSR). Source and drop nodes in UPSR
or 1+1 (linear) protection have capacity for only 224 VT1.5 cross-connects because an additional
STS is used for the protect path.
shows the VT1.5 capacities for ONS 15454 cross-connect cards. All capacities assume each
XC, XCVT, and XC10G VT1.5 Capacities
Total VT1.5s
VT1.5 Cross-Connect
(BLSR)
Capacity (BLSR)
0
0
672
336
672
336
shows the logical flow of a VT1.5 circuit through the XCVT/XC10G STS and VT matrices
Two of the 24 XCVT or XC10G STSs available for VT1.5 traffic are used (one STS for VT1.5 input
into the VT matrix; one STS for VT1.5 output).
22 STSs are available for VT1.5 circuits.
The STS-1 from the EC-1 card has capacity for 27 more VT1.5 circuits.
Chapter 6
VT1.5 Cross-Connect Capacity
(UPSR or 1+1)
0
224
224
Circuits and Tunnels
November 2001
Advertisement
Table of Contents
