<https://cignal.ai/2021/12/ip-over-dwdm-and-coherent-pluggables-impact-metro-wdm-spending/>
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"IP-over-DWDM and Coherent Pluggables to Impact Metro WDM Spending - Cignal AI"
<https://cignal.ai/2021/12/ip-over-dwdm-and-coherent-pluggables-impact-metro-wdm-spending/>