Lumen and ciena transmit record-breaking 1.2 tbps wavelength service across 3,050 kilometers

Network trial paves the way for hyperscalers and enterprises to have the bandwidth agility and cost-efficiency needed for ai and next-gen applications denver , march 27, 2025 /prnewswire/ -- lumen technologies (nyse: lumn) and ciena (nyse: cien) have successfully established a 1.2 terabit wavelength service trial across 3,050 kilometers (more than 1,800 miles) on lumen's ultra-low-loss (ull) fiber network, making it the world's longest 1.2 terabit non-regenerated signal. using 800g interfaces, lumen and ciena successfully tested and qualified the services to support wavelength, ethernet, and ip services over the 1.2 tbps single carrier channel.
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