Ciena’s role in recent 400G industry-first milestones
Are you confused about the recent 400G milestones announced and how this is different than what has been discussed for a few years?
By Helen Xenos – In recent weeks, we have seen two 400G announcements come out, the first from AT&T followed by a second from Internet2, each speaking of achieving new milestones in the industry. To the casual observer, it may not be clear what is new about these announcements. Haven’t we been talking about 400G deployments for several years now? Well, yes and no. To understand the importance of these announcements, you need to take a closer look. With Ciena innovations playing a key role in both cases, here are some insights.
The first point to understand is that in networking, 400G can mean different things. 400G is a term loosely used to describe a communications link that can carry 400 billion bits per second, or 400 Gigabits per second (400Gb/s). There are two types of 400G connections:
1) 400G wavelength: here, 400Gb/s are carried over a single carrier in a fiber optic cable that can transport a mix of different client traffic rates (ex. 10GbE, 100GbE or 400GbE) across long distances over an optical infrastructure. A coherent optical transponder is used to aggregate client traffic and transport them over a single 400G wavelength.
Apart from Ciena’s WaveLogic Ai, coherent optical solutions capable of 400G speeds are relatively new. WaveLogic Ai is the exception, with commercial, volume shipments beginning in the fall of 2017, and the foundation for the majority of 400G deployments in the industry to date.
The key value of WaveLogic Ai is that users can double traffic carrying capacity per wavelength versus 100G/200G solutions and reduce footprint, energy consumption and cost per bit. Network providers can select capacity rates from 100G to 400G and transport traffic at 400Gb/s for 300km distances, 200Gb/s for 3000km distances and 100G for ultra-long-haul links. more>