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deer_in_the_light 12/5/2012 | 1:33:34 AM
re: Supercomm: A ROADM Show? Who is supplying ROADMS to MSOs?
opticalone 12/5/2012 | 1:33:27 AM
re: Supercomm: A ROADM Show? The only ROADM deployments that I'm aware of are in Comcast and Brighthouse who are using Fujitsu for VOD. I believe that Adelphia might be trialing Movaz but I think it is fairly limited while they are going through Chapter 11.
Vent 12/5/2012 | 1:33:22 AM
re: Supercomm: A ROADM Show? I may be a little dumb but for a truly reconfigurable OADM don't you also need to have
tunable lasers otherwise the guy will still need to get in his van and change the transmitter ??
deer_in_the_light 12/5/2012 | 1:32:59 AM
re: Supercomm: A ROADM Show? Not only do you need tunable lasers at the ingress but tunable receivers at the egress.
fiber_r_us 12/5/2012 | 1:32:58 AM
re: Supercomm: A ROADM Show? Reconfigurable OADMs do not *require* tunable lasers. A ROADM is an OADM that can *dynamically* decide which wavelengths are added/dropped at the OADM site. This is a seperate issue from having transceivers that have tunable lasers/receivers, which adds another degree of freedom. One could design a dynamic system with one, the other, or both technologies.
MrLight 12/5/2012 | 1:32:39 AM
re: Supercomm: A ROADM Show? deer_in_the_light, for a true ROADM you need what I stated in http://www.lightreading.com/bo... , which in short is:


1)Tunable Lasers with hitless tuning
2)Tunable Add (Egress) Filters
3)Tunable Drop (Ingress) Filters with hitless tuning
4)Tunable Group or Band Filters if using a Banded wavelength plan
5)Optical amplifiers that can can tolerate wavelengths going away while they are being tuned if slow-tuning is used.
6)Connection signalling intelligence
7)Optical Power Management intelligence

The receivers (PINs or APDS) are wide-band so they don't need to be tunable.

The biggest issue is COST. The second biggest issue, yes I could say cost again, but I won't is availability of optical components that have wide tunablity, the third issue is the weak value proposition if the ROADM function is only used for ADDS, MOVES and CHANGES versus new services such as on-demand wavelengths.

I doubt today's bunch of ROADM companies have real "ROADMs", but lets say they do, then their ROADMs better be only about 1.2 times the cost of a FOADM, and even then its a tough sell until switched wavelength services, such as those discussed OTN and GMPLS back in 1999, are on the service providers' table of new business services.

MrLight...I will be at SuperComm04 looking at access
thekdi 12/5/2012 | 1:31:18 AM
re: Supercomm: A ROADM Show? Lightwave Magazine Article about JDSU ROADM:
http://lw.pennnet.com/Articles...
silenceofthelambdas 12/5/2012 | 1:30:24 AM
re: Supercomm: A ROADM Show? ... industrial microwave oven?
That is one weird looking appliance.
- SOL
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