Chapter 8. Protection
Vol. IV-8-2 Alcatel-Lucent
Table 8-1. Dual Protection Options
1+1 Ring Link Protection
A 9500 MXC Super-PDH ring protected network can be enhanced with one or
more 1+1 protected links.
• 1+1 protection of a ring-protected link is normally implemented to provide path
protection as distinct from equipment protection. Therefore space diversity
(SD) is the required/recommended 1+1 protection mode.
• 1+1 protection may be applied to co-channel ring links. Using RAC 40s two
concentric, autonomous rings of equal capacity/bandwidth can be configured to
operate on the same frequency using the V and H polarizations.
For more information on RAC 40 ring operation, with and without 1+1
protection, refer to Co-channel Operation on page 3-102, Volume II, Chapter 3.
Tributary protection provides redundancy for trib circuits in the event of a
DAC failure.
Protected DAC operation is supported for:
• DAC 3xE3/DS3M
• DAC 1x155o
• DAC 2x155o
• DAC 2x155e
• DAC 155oM
For Node protection topics refer to:
• Node Protection Configuration on page 8-3
• Node Protection Operation and Rules on page 8-3
• Link and Data Protection Configuration Screen on page 8-10
Master Protection Subordinate Protected Link Pairings
Link A Link B
Frequency Diversity Hot Standby Hot Standby
Hot Standby Non-protected
Space Diversity Space Diversity
Space Diversity Non-protected
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