Chapter 3. 9500 MXC Nodes
Vol. II-3-104 Alcatel-Lucent
co-channel operation. This document specifies the performance of a system in
the presence of cross polarization interference (XPI) coming from an opposite
polarization.
Refer to RAC 40 Operating Guidelines for application data and example
configurations.
RAC 40 Operating Guidelines
Two RAC 40 cards are used to support:
• Co-channel STM1/OC3
• Co-channel 64 or 75xE1
• Co-channel 70, 84 or 100xDS1
Refer to:
• Backplane Bus Capacity on page 3-104
• Settings, Protection and ATPC on page 3-105
• Example Configurations on page 3-106
For information on RAC 40 refer to RAC 40 on page 3-28.
Backplane Bus Capacity
An INU/INUe has a maximum backplane bus capacity of 100xE1, 128xDS1, or
2xSTM1/OC3, which for the available RAC 40 capacities means that co-channel
operation is only supported for STM1/OC3. See Figure 3-58 on page 3-107.
• One INU/INUe supports co-channel STM1/OC3 when configured as a terminal
Node.
• One INUe supports co-channel STM1/OC3 when configured as a repeater Node
(no drop-insert to an external mux).
Two co-located INU/INUes support co-channel operation for 64/75xE1, 70/84/
100xDS1, or STM1/OC3.
• The co-channel RAC 40 pairs are installed across the INU/INUes as shown in
Figure 3-59.
For more information on node capacity rules refer to Appendix E.
Co-channel operation only has application where a single-path capacity greater
than that provided by a single RAC 30V3 is required; path capacities greater than
75xE1, 100xDS1, or STM1/OC3.
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