Alcatel-Lucent 9500 MXC User Manual page 486

Chapter 8. Protection
Vol. IV-8-4
• For a Ring, two RACs, or a RAC and a DAC 155oM, must be installed. The
two RACs may be different types, such as a RAC 30 in one direction, and a
RAC 3X in the other.
• For a protected Tributary, two DACs of the same type must be installed.
2. The RAC protection function switches Tx and Rx paths independently.
3. Within the Protection screen, a RAC or protected RACs are identified as
LINK. A DAC or protected DACs are identified as DATA.
4. Partner plug-ins will only be permitted within the slot conventions for the
INU and INUe. Refer to 9500 MXC Node Slot Numbering Conventions on
page 1-7 of this Volume.
5. Where protected co-channel operation (protected RAC 40s) is required,
hot-standby or diversity can be selected.
• The protection partner RAC 40s must be installed in the same INU/INUe.
Normal 9500 MXC hot-standby or diversity operation and rules apply.
• The co-channel partner RAC 40s must be installed in a co-located partner
INU, with one INU used on vertical polarization, the other horizontal. To
avoid confusion, the vertical and horizontal assignments should be entered
in the Polarization Settings panel in the Plug-ins screen.
• An equal-loss coupler must be used with the protected ODU pairings.
6. Once a protected pairing is configured, one or both RACs or DACs may be
withdrawn without affecting the configuration and the protection screen
representation.
7. A protected pairing will be returned to non-protected on selection of
Non-Protected in the Partners column, or if one of the protected plug-ins is
replaced by an incompatible plug-in type (such as a DAC 16x), and the
incompatible plug-in is installed as the accepted plug-in the System Summary
screen.
8. When two non-protected LINKs (2xRAC) are selected for hot-standby or
diversity, the protected link will assume the circuit connections (traffic and
auxiliary) of the primary RAC. Similarly, for hot-standby DATA (DACs) the
protected DATA will assume the circuit connections of the primary DAC.
Any circuit connections previously assigned to the secondary RAC/DAC will
be dropped.
• To ensure that circuit connections of what will be the primary link are
retained, the selection of the primary RAC must be made by first
highlighting the RAC which is to become the primary, and then selecting its
secondary partner from the Partners sub-menu.
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