re: Nortel Shows Single-Slice 100GEI really don't think it cost much to make a youtube video.
On the other hand, compare 100GE from Nortel vs. Ciena: Nortel Ciena reach 800km 80km PMD 60ps unknown (prob. 0 or very low?) hammer no error not demonstrated fiber NDSF+TWRS unknown polarization scrambled unknown (prob. not) OADM: 50GHz 50GHz propagation 112,100,40 & 10 single channel 112 line rate 112gbps 112gbps
re: Nortel Shows Single-Slice 100GE I thought about this as I watched....So, why would you spend this money on something you were selling unless this was part of your plan on selling it.
re: Nortel Shows Single-Slice 100GEThis is an extremely impressive demonstration.
I think it shows the kind of optical transmission expertise that exists within Nortel. Just like with Bell Labs, these people are technical giants who are led by business pygmies!
It also indicates the depth of the financial situation we're all in that a buyer for this amazing technology has not yet come forward.
My thoughts are with all the hard workers at Nortel facing an uncertain future at this time of the year. God bless you all.
re: Nortel Shows Single-Slice 100GEIt is an impressive demo, but it would have been more impressive (and promising) if they had run two waves adjacent to each other instead of just one.
re: Nortel Shows Single-Slice 100GE1. Nortel clearly shows 2 wavelengths on the screen to carry 112g, not 1 as article claims
2. Its not really 100g serial connection to Ixia box. Ciena used 10x10Ge striping. Ixia uses SNAP12, which is 12x8.5g striping. What looks like one orange cable on video is actually a 12 fiber connection.
3. Whats with all the plastic bags and lots of cables on the front of NT boards?
re: Nortel Shows Single-Slice 100GEPavlovsdog: "Nortel clearly shows 2 wavelengths on the screen to carry 112g, not 1 as article claims"
The article is perfectly right, as it clearly says that "two optical carriers inside its 112-Gbit/s wavelength" are used and that these two carriers are spaced so close togehther that "one ITU-grid assignment at 50 GHz spacing" is required, so that it can be "switched as one wavelength". which is what is actually important here.
re: Nortel Shows Single-Slice 100GENot to take away from the impressive demo, but...
Is this guy for real, or did they go out and find some scraggly bearded guy and fill his shirt pocket with a calculator and pens just to give the demo better nerd credentials?
re: Nortel Shows Single-Slice 100GEThat's Dave Doucette, a genuine optical wizard from the Titan lab. Of course after that hammer stunt we'll have to call him Bam-Bam. ;-)
re: Nortel Shows Single-Slice 100GEI would agree this is an impressive demonstration... The first (and only) company to implement a coherent detection system for both 40G and 100G.
That said, what we're looking at here is an IMUX of a 100G client across two existing 40G coherent line cards which have been over-clocked to ~56G. Yes, they've done a great job of bolting together two pieces of existing gear and out-demo'd the rest of the field by a long shot.
But: - Can you productize a contraption like this? - How many double-wide line cards can be used in a shelf and operate over temp - No one has yet challenged the performance limitations of two wavelengths shoehorned into a single ITU grid.
Nortel would have us believe 40+40=100. The holy grail for 100G DWDM is still a true, single-carrier coherent system which addresses these concerns. We're still waiting for that one...
re: Nortel Shows Single-Slice 100GE[AD said] "Nortel would have us believe 40+40=100. The holy grail for 100G DWDM is still a true, single-carrier coherent system which addresses these concerns. We're still waiting for that one..."
Yes, but we have to walk before we can run. These demos are good for showing progress and proof of concepts. For practical use, it's all about unit cost and also the requirements one has for the spectral efficiency. Higher data rates can certainly be achieved with 10G/40G like components and optical impairments will be similar to those in a 10G system and if the system capacities are adequate and costs are good, many will not care about single or multiple carriers or even if the solution uses IMUX.
On the other hand, compare 100GE from Nortel vs. Ciena:
Nortel Ciena
reach 800km 80km
PMD 60ps unknown (prob. 0 or very low?)
hammer no error not demonstrated
fiber NDSF+TWRS unknown
polarization scrambled unknown (prob. not)
OADM: 50GHz 50GHz
propagation 112,100,40 & 10 single channel 112
line rate 112gbps 112gbps