Chapter 3. 9500 MXC Nodes
Vol. II-3-112 Alcatel-Lucent
• Co-channel ring links can be 1+1 protected using space diversity or
hot-standby.
• 1+1 protection of a ring-protected link is normally implemented to provide
path protection as distinct from equipment protection. Hence space diversity
(SD) is the required/recommended 1+1 protection mode.
• One or all co-channel ring links can be 1+1 protected.
• Where co-channel ring links are to be 1+1 protected, both must be 1+1
protected.
• The 1+1 protection is subordinated to the ring protection mechanism (ring
wrap and unwrap). For guidance on 1+1 protection of ring links refer to 1+1
Protected Ring Links on page 3-84.
• When using a coupler to combine two ODUs onto a single polarization, the
operating channels must be chosen from within the same diplexer option. If the
two ODUs are not from the same tuning/diplexer option interference may
occur, resulting in degraded link performance.
Example configurations are provided for:
• Co-Channel STM1 Ring Node with Drop-Insert.
• 300 Mbps Co-channel Ring Node: 2x150 Mbps
• Co-Channel 64xE1 Ring Node with 16xE1 Drop-Insert.
• Space Diversity Protected 64xE1 Co-channel Ring Links.
• 4+4 Space Diversity Operation Using CCDP and ACCP
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