TELUS carried an 800G wavelength from Toronto to Quebec City, a distance of 971.2km, using equipment from Ciena.
The record-setting link leveraged Ciena 6500 shelves equipped with WaveLogic5 Extreme (WL5e) technology.
https://www.ciena.com/insights/articles/ciena-and-telus-bring-800g-to-canada-break-worldwide-transmission-record.html
