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Optical/IP

Supercomm: A ROADM Show?

There will be no shortage of buzz about reconfigurable optical add/drop multiplexers (ROADMs) during Supercomm next week. And it's no surprise, either, as carriers' interest in purchasing ROADM gear is gradually getting stronger.

"Every man and his dog is going to have a ROADM story soon," moans Rob Lane, VP of marketing and business development at Tropic Networks Inc. "Now that service providers have demonstrated that ROADM is real, everyone's rushing to catch up."

Why the rush? Because ROADMs purport to make WDM networks flexible, allowing operators to remotely change the way wavelengths are taken in and out of a particular optical switching node. Older OADMs require manual configuration, so ROADMs can save carriers some bucks by eliminating truck rolls and man hours (see ROADM Vendors Perk Up).

This is a big deal to carriers, because their enterprise customers prefer lower-cost Ethernet connections to Sonet-based circuits in many cases. That kind of product substitution can take a toll on a carrier's wholesale and retail businesses, prompting the need for more bandwidth flexibility between central offices.

"The blur between long-haul and regional networks is becoming very blurry," says Movaz Networks Inc. VP of product management Dave King.

AT&T Corp. (NYSE: T), SBC Communications Inc. (NYSE: SBC), and Verizon Communications Inc. (NYSE: VZ) are all said to have RFPs out specifying ROADM technology, and cable MSOs will soon follow suit, analysts say. Lucent Technologies Inc.'s (NYSE: LU) WDM contract with Verizon is said to be expiring toward the end of this year, potentially opening the way for some upstart competition for that account, according to one ROADM proponent.

Infonetics Research Inc. estimates that the market for "systems sold with ROADM capability" will be worth about $85 million in 2004.

One vendor already beating the pavement about its new ROADM solution is Movaz Networks. The company's RAYROADM is an integrated, metro box that boasts the ability to reconfigure any wavelength or any combination of up to 40 wavelengths. The ROADM box can be deployed separately or as an upgrade to existing RAYexpress customers, Movaz says.

Movaz says the 10 RU RAYROADM and the 4 RU RAYexpress products are managed by the same network management software, an appeal to the company's current set of 46 customers. That number is probably set to grow, because Tokyo-based reseller Netmarks Inc. says it plans to test Movaz's gear.

Movaz's next product release for its ROADM gear, early next year, will include the ability to interconnect up to four rings, says King. The so-called multi-ring ROADM will provide the ability to add and drop wavelengths from multiple rings, and the ability to switch wavelength from any ring to any other ring.

Within one year, Movaz says it will have colorless, or tunable, ROADMs, an improvement that enhances the ability of the device to drop any wavelength to any add/drop port on the ROADM.

Movaz is, of course, but one of many competitors in the space.

Tropic Networks' Lane says his company's ROADM box has been generally available since last year, but it hasn't been in any network deployments or trials "that we've admitted to publicly." Tropic and Alcatel SA (NYSE: ALA; Paris: CGEP:PA) constitute one paired set of vendors reportedly on the shortlist for SBC's ROADM RFP.

Mahi Networks Inc., interestingly, just acquired some ROADM capability with its purchase of Photuris's remains (see Mahi Nabs $70M, Photuris Assets and Photuris & SBC: The Inside Story). And Lucent is said to be close to announcing a new piece in its Metropolis line based on Movaz technology and with ROADM capabilities in mind.

It's worth pointing out that ROADMs supplied by Marconi Corp. plc (Nasdaq: MRCIY; London: MONI) have been carrying live traffic in BT Group plc's (NYSE: BTY; London: BTA) network for several years (see Tropic: Hot or What?).

— Phil Harvey, News Editor, Light Reading

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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