Alcatel-Lucent 9500 MXC User Manual page 98

Chapter 3. 9500 MXC Nodes
Vol. II-3-4
The traffic-handling capacity limit of the bus for each rate is:
• 100 x E1 (204.8 Mbps)
• 128 x DS1 (197.6 Mbps)
• 6 x DS3 (268 Mbps)
• 2xSTM1/OC3 (311 Mbps)
Where a mix of different rates is required, such as NxE1 and STM1/OC3, a
multiplexer DAC enables STM1/OC3 mapping to an E1 configured bus. In this
way E1 and STM1/OC3 interfaces are supported on the same INU without the
need for a stand-alone SDH mux.
Where Ethernet data is transported capacity (bandwidth) is assigned in 2.048
Mbps, 1.544 Mbps or 155.52 Mbps steps to align with the capacity needed for
E1, DS1 or STM1/OC3 waysides. 9500 MXC incorporates a universal modem
design that does not distinguish between the type of data to be transported,
Ethernet or TDM; data is simply mapped into byte-wide frames to provide a
particularly efficient and flexible wireless transport mechanism, with the result
that when configured for Ethernet data, or Ethernet and TDM data, the full
configured capacity is available for user throughput.
Figure 3-3 illustrates the relationship of the plug-ins with the cross-connect
function of the backplane bus, which is managed by the NCC. An NPC option is
available to provide redundancy for this bus management and power supply
functions.
Table 3-1 summarizes PDH and SDH link capacity options against the backplane
maximums.
Table 3-2 summarizes the Ethernet link data and backplane maximums.
While each RF path from a 9500 MXC Node can be configured support the
capacities shown, where multiple RF paths are to be established the combined
total from each path must not exceed the backplane bus maximum as defined
under above.
Where more capacity is required, two or more INU/NUes are co-located and
interconnected using the DAC options.
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