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Cisco MGX 8800/8900 Series Hardware Installation Guide
Releases 2 - 5.2, Part Number OL-4545-01, Rev. H0, May 2006
Chapter 4 Planning for Card Redundancy, Line Redundancy, and Bulk Distribution
Planning for Standalone and Redundant Line Configurations
Figure 4-5 shows how redundant PXM1E cards use a Y-cable to connect to standalone lines.
Figure 4-5 Redundant PXM1E Configuration with Standalone Lines
Figure 4-6 shows how redundant AXSM cards connect to standalone lines. Other service modules that
support 1:1 card redundancy, such as FRSM12 and FRSM-HS2/B, use Y-cables in a similar manner.
Figure 4-6 Redundant AXSM Configuration with Standalone Lines
Note This configuration provides fault tolerance for the front cards only. This configuration does not provide
fault tolerance for back cards or lines. If you need fault tolerance for back cards and lines, refer to
“Redundant Line Configuration Guidelines” section on page 4-14.
PXM1E front cards
Y-cables
80148
Midplane
1
2
PXM-UI-S3/B back cards
OC-3c or OC-3c/DS3 combination back cards
1
2
AXSM front cards AXSM back cards Y-cables
1
2
45056
Midplane
1
2
1
2
1
2