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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
• Some service module back card types require an APS mini-backplane to support intercard APS. The
APS mini-backplane requirements are listed in Table 4-4.
• On an MGX 8880 Media Gateway, slots 3 and 4 do not support intercard APS.
• When used with SONET or SDH interfaces, the SRME/B provides the same APS support as the
SRME.
• Redundant SRME and SRME/B back cards must be joined together with the APS mini-backplane.
The SRME APS mini-backplane requirements are listed in Table 4-4.
• The working line must be defined on the primary card, and the protection line must be defined on
the secondary card. The primary and secondary cards are predefined for PXM1E and SRM, and are
defined during configuration for AXSM, MPSM, and VXSM.
• The working line and protection line numbers must be identical for intercard APS configurations.
For example, you can assign the working line to line 9 on a primary PXM1E-COMBO card and the
protection line to line 9 on a secondary card. You cannot assign the working line to line 9 on one
card and the protection line to line 10 on the other.
• The switches at both ends of the APS lines must be configured for APS, and the role of each line
(working or protection) must be the same at both ends of the line.
Table 4-4 describes the APS connector requirements for intercard APS.
Table 4-4 APS Connector Options and Requirements
Front Card Type MGX 8830 APS Options
1
MGX 8850 APS Options
1.
MGX 8880 APS Options MGX 8950 APS Options
AXSM/A Cards (labeled AXSM)
AXSM-1-2488 — Slots 1–6, 9–14:
MGX-8850-APS-CON
MGX-APS-CON
2
——
AXSM-4-622
AXSM-16-155
AXSM/B Cards
AXSM-1-2488/B — Slots 1–6, 9–14:
MGX-8850-APS-CON
MGX-APS-CON
2.
Slots 1, 2, 5, and 6:
APS connector built in.
Slots 3 and 4:
No intercard APS.
Slots 9–14:
MGX-8850-APS-CON
MGX-APS-CON
Slots 1-6, 11-16:
MGX-APS-CON-8950
AXSM-4-622/B
AXSM-16-155/B
AXSM-E Cards
AXSM-2-622-E — Slots 1–6, 9–14:
MGX-8850-APS-CON
MGX-APS-CON
2.
Slots 1, 2, 5, and 6:
APS connector built in.
Slots 3 and 4:
No intercard APS.
Slots 9–14:
MGX-8850-APS-CON
MGX-APS-CON
—
AXSM-8-155-E