re: Invites Go Out for Metro DWDM TestWiiliams Communication is under huge debt which it cannot pay. Over a number of years the company has lied to its investors and shareholders. The company has been delisted and trades over the counter.
Williams started offering a number of services but without understanding the markets and revenues. It managed to fool its investors regarding its potential.
Williams in someways is like QWEST and Global Crossings in terms of its business aproach and misleading statements.
There are so many service providers that their existence and profitability is a big question mark.
All Carriers, including SBC, AT&T, Qwest, Verizon, and Bell South are posting big losses. The management and service model structure at AT&T and Quest is an open question mark?
Like Qwest, Williams Communicatins also wanted to be in lime light and it started all kind of wild things such as beta testing equipments equipments from junky start-ups.
Currently Williams is under investigation by several state and Federal Government agencies.
re: Invites Go Out for Metro DWDM TestHarvey Mudd: What does this have to do with anything in this article? Just because Williams may participate in the testing? If they've been beta-testing startup "junk" then they might know how to perform the proper tests, no?
As usual, your stream-of-consciouness staccatto-inuendo numbs the brain. I'm almost starting to wonder if you are not some AI joke/program cooked up by a clever post-doc at MIT media labs or something.
re: Invites Go Out for Metro DWDM TestGea said; "Well, we're not the only ones who will point this out. When the proper SMEs from the vendors see that testplan, you'll see it change drastically..." _________________________________________________
Actually these issues have been apparent for a long time. When the first aplified DWDM systems got beyound 4 wavelengths, the issues of EDFA gain balancing, wavelenth mixing to power ratios, PMD, second and third order of PMD, etc became research issues with the big carriers. There is currently work going on to try to correlate optical signal degredation to bit error or other optical problems.
In metro deployments, it will be less of an issue because, most of the time, amplifers are not used. Pure optical link services do however have a problem because that correlation between optical signal integrety and BER is still not "solid".
What does become an issue in metro deployments is wavelength mangement. High density DWDM is very expensive to use for low bandwidth services. CWDM, while less expensive, has limited wavelenths such that "grooming" is needed between any two fiber facilities.
All of this comes back to the reality that all of the performance monitoring is done in the electrical level, not the optical level. It is, in most cases, less expensive. It has a proven history of correlation to performance. The majority of the traffic is SONET/SDH based which has build in monitoring functionality. The OEO has to be done most of the time anyway, so why not use it.
The remaining problem is how to support optical bit signal level leased circuit services for transmission links other than SONET. There still needs to be an "out of band" overhead like what is used for SONET for the other optical protocols. 10GbE uses a "SONET like" overhead as a digital wrapper, but it is still octet based. GbE, FC, Fast E, ESSCON and others that are 5 bit or 10 bit encoding based do not currently have anything to support them the way that SONET is.
re: Invites Go Out for Metro DWDM Test"G.709 was designed for octet oriented bit streams on optial services. "
Oh. That's what you meant. Well, that probably means they'll need some wacky stuffing bytes and mapping. The guys on that standards committee told me it was supposed to be able to handle GbE, but I never asked them how.
"Also, there is a lot of extrainious functionality in G.709 that does not lend itself to an inexpensive technology deployment that is traditional with Ethernet."
Well, I have been critical of G.709 in part for this reason (and because it pretty much duplicates SONET functionality). BUT, some of these extraneous features are badly needed by GbE. As for cost, it also looks to me like it will be very costly, BUT with the built-in FEC, some of that cost could possibly be made up for by the extended reach that FEC allows (or the use of cheaper transmitters and receivers).
"G.709 was primarily inititated for 40G in the transport core, not GbE in Metro environments."
The ITU document G.709 targets 2.5G, 10G, and 40G as a start. But it was actually supposed to be a workhorse all over the place, particularly in the metro core, where non-SONET-framed payloads would syupposedly be common. The extensive use of FEC could make up for the losses due to OADMs and noise from EDFAs.
I agree that G.709 is not a sure thing--SONET seems to do 99% of what G.709 will do (inlcuding newly avaialble in-band FEC, BTW), while having already started to inch down the cost curves.
re: Invites Go Out for Metro DWDM TestG.709 was designed for octet oriented bit streams on optial services. It was not designed for dectet oriented optical bit streams. The run length encoding is different as well.
Also, there is a lot of extrainious functionality in G.709 that does not lend itself to an inexpensive technology deployment that is traditional with Ethernet. G.709 was primarily inititated for 40G in the transport core, not GbE in Metro environments.
Why not do away with trying to solve a management problem for wavelength based services by simply not using wavelengths for services? As far as I can tell, today you can get GbE FICON ESCON Fibre Channel delivered by DS3, OC-3, OC-12 and OC-48. Why do you need wavelengths at all, except for fibre relief between SONET terminals?
Williams started offering a number of services but without understanding the markets and revenues. It managed to fool its investors regarding its potential.
Williams in someways is like QWEST and Global Crossings in terms of its business aproach and misleading statements.
There are so many service providers that their existence and profitability is a big question mark.
All Carriers, including SBC, AT&T, Qwest, Verizon, and Bell South are posting big losses. The management and service model structure at AT&T and Quest is an open question mark?
Like Qwest, Williams Communicatins also wanted to be in lime light and it started all kind of wild things such as beta testing equipments equipments from junky start-ups.
Currently Williams is under investigation by several state and Federal Government agencies.