In the final of a two part article, Jon Baldry the metro marketing director at Infinera, says DAA offers exciting opportunities, but migration to this new architecture presents a raft of new challenges. Fibre and dense wave division multiplexing (DWDM) pushing deeper into the access network from the secondary hub to remote RPDs means a tenfold or so increase in the number of end points for the DWDM network. Secondary hubs will now also have to aggregate 100s of 10Gb/s circuits from RPDs into efficiently filled 100Gb/s backhaul circuits to the primary hubs. These secondary hub locations are often already space and power constrained and when they aren’t, operators may look to consolidate secondary hubs, creating a space and power constrained environment.
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