Chapter 3. 9500 MXC Nodes
Vol. II-3-22 Alcatel-Lucent
RAC
Different RAC versions provide support for capacity and bandwidth options up
to 2xSTM1/OC3.
• Available are RAC 30V3, RAC 3X, and RAC 40.
• Up to three RACs can be fitted in the INU universal slots, and six in the INUe.
• Paired RACs/ODUs are used for protected and co-channel operation.
• RACs are field replaceable and hot swappable. They are not frequency
dependent.
• An INU/INUe can be installed with a mix of RAC versions (RAC 30V3, RAC
3X, RAC 40)
Refer to:
• RAC 30V3, RAC 3X on page 3-22
• RAC 40 on page 3-28
RAC 30V3, RAC 3X
RAC 30V3 is the intermediary between the digital baseband and ODU 300 for
capacities from 5xE1/4xDS1 to STM1/OC3, with channel bandwidths up to 28/
30 MHz. It incorporates Reed Solomon FEC encoding with interleaving, and
adaptive equalization.
RAC 3X is physically similar to RAC 30V3 and is the intermediary between the
digital baseband and ODU 300 for channel bandwidths from 28/30 to 50/56
MHz, for capacity options of:
• 64/75/93/100xE1, 1/2xSTM1
• 32/70/84/100xDS1, 4xDS3, 1/2xOC3
RAC 3X FEC incorporates Reed Solomon encoding with interleaving, Viterbi
encoding, and adaptive equalization.
Refer to:
• RAC Capacity and Bandwidth Options
• Typical Link Delay Times
• RAC Front Panel Layout
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