NSN Shows hiT 7300 Coherent 40G Transponder

Nokia Siemens Networks unveiled its hiT 7300 coherent 40G transponder for integration into the hiT 7300 DWDM platform, which has been deployed for more than 80 customers worldwide.



The company said its hiT 7300 coherent 40G transponder platform is easier to install than existing systems because it does not require the costly and time-consuming fiber measurement. In new deployments, operators can avoid even the need for dispersion compensating modules, leading to low-latency connections, simplified amplifier design and overall reductions in deployment costs and footprint.


In addition, the Nokia Siemens Networks transponder supports 40G transmission over older fiber -- dating back to the 1990s and earlier -- unlike existing systems. It utilizes the installed network infrastructure, thereby protecting the operator's investments by using"coherent transmission" technology, in particular a modulation format called CP-QPSK (coherent polarization multiplexed quadrature phase shift keying).
http://www.nsn.com