Alcatel-Lucent 9500 MXC - Page 168

Chapter 3. 9500 MXC Nodes
Vol. II-3-74 Alcatel-Lucent
protection is generally offered with or without hitless receive operation.
• Space or frequency diversity are used for path protection. They also provide
hardware protection.
• Hot-standby is used for hardware protection.
• Ring protection is primarily used for hardware protection though through its
inherent route diversity it does provide protection against localized (single link)
path failure events. Switching of ring-protected circuits is not hitless.
9500 MXC also supports dual-protection whereby a master protection option
protects two subordinate protected links, or one protected link with one
non-protected link. 9500 MXC dual protection options are:
• Frequency diversity over hot-standby
• Frequency diversity over space diversity
For more information on dual protection, refer to Dual Protection on page 3-76.
RAC / ODU Protection Partnering
RAC 30 and RAC 3X:
• Supports hot standby and diversity. Rx switching is hitless; Tx switching is not
hitless.
• Supports ring protection. Ring switching is not hitless.
RAC 40:
• Supports hot standby and diversity (protected co-channel links). Rx switching
is hitless. Tx switching is not hitless.
• Supports ring protection of CCDP XPIC ring links. Each link operates on the
same frequency channel, but as separate ring-protected links (Two concentric
rings, one on the vertical polarization, the other on the horizontal). Ring
switching is not hitless.
Table 3-27. Primary Protection Options
Devices Protection Type
2x(RAC 30V3 / RAC 3X +
ODU 300)
Hot-standby
Diversity
Ring
4x(RAC 40 + ODU 300)
(Protected XPIC co-channel)
Hot-standby
Diversity
Ring (protected XPIC ring links)