Alcatel-Lucent 9558HC User Manual page 142

Functional description
Power supply interface
INCA module
Tx side
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• Extracts management flows from the incoming traffic to the CPU port
• Performs traffic adaptation if needed
• Performs Quality of Service and policing on flow to be sent over the radio link
• Performs modulation and demodulation of the resulting modem frame
The power supply comes from office power. The MPT-HC V2/MPT-XP/9558HC input
voltage range is from -28 Vdc to -58 Vdc.
The INCA module hosts the physical electrical Ethernet interface.
Following the flow from user Ethernet port to radio, the section performs:
• Reception of incoming Ethernet frames from the optical or electrical user interface
(through INCA)
• Recovery of the clock coming from the indoor unit
• Switching of the management frames from user port to internal processor
• Generation of MPT-HC V2/MPT-XP/9558HC to MPT-HC V2/MPT-XP/9558HC
messages needed for radio link, such as ATPC or ACM
• Compression of the TDMoEth frames header (TDM2TDM - MEF8, TDM2ETH -
MEF8)
• Management of the Quality of Service
• Fragmentation of the Ethernet frames
• Shaping of the traffic to adapt it to radio bandwidth
• Tx Modem frame building
• Tx Radio frame building such as FEC or pilots
• Synchronisation depending on the selected synchronisation mode (SynchE/PCR)
according to the connection type
• Modulation in I and Q analog signals to be sent to the RF section
MPR-e