Partners in WDM-PON

6:15 PM -- For some of us in the U.S., the recent LG-Ericsson Co. Ltd. announcement of a WDM-PON ecosystem came with one major question: Who are these guys?

The ecosystem so far consists of three vendors of customer premises equipment: Comtrend Corp. , Genexis B.V. , and Teldat . (See CPE Vendors Join WDM-PON Ecosystem.) Comtrend, I've heard of. (See, for instance, Comtrend Picks BroadLight's GPON.) The other two? Shrug.

They're all well-known names in Europe, says Rafa Sanchez, who's part of the WDM-PON business development team at LG-Nortel. They'll each be combining their home gateways with LG-Nortel's Optical Network Unit (ONU), so that carriers can have one box at the home instead of two.

Carriers were asking LG-Nortel for that kind of integration, and that's understandable. Having fewer boxes for the home user to string together sounds good for any access technology -- especially one like WDM-PON that's still trying to get established.

More vendors along those lines are likely to join soon, he says, as are others such as OSS vendors.

— Craig Matsumoto, West Coast Editor, Light Reading

bw 12/5/2012 | 3:59:27 PM
re: Partners in WDM-PON WDM-PON is realy a point-to-point symmectric access system, it's an over-kill for individual homes. It's more than ikely a "FTTB" (Fiber to the buiding", or for multiple dwelling Units type of deployments.
cw.774 12/5/2012 | 3:59:26 PM
re: Partners in WDM-PON

It's Ethernet & provides ease of mixing dedicated P2P or FTTN/FTTB line

bollocks187 12/5/2012 | 3:59:25 PM
re: Partners in WDM-PON BS

WDMPON is an overkill -it cannot compete with PON or PT-PT ACTIVE.

paolo.franzoi 12/5/2012 | 3:59:23 PM
re: Partners in WDM-PON



I hate to put words in another's mouth, but basically its cost.  The original Novera system ran 100 Mb/s symmetrical to customers (mostly businesses in Korea).  That is approximately the same bandwidth as you can get from a GPON and is not close to an Active Ethernet if you put a GigE to a home (I will put some more info in a PS).

The current system is supposed to run 1G per customer on the access side.  I have not heard of any large scale deployments, but it is likely being trialed in Korea.

The thing is that this system (the first true WDM-PON that I am aware of) uses some custom optical parts that it is not obvious are competitive cost wise with PON transceivers (diplexers for both GEPON and GPON are sub-$20 in volume).  So, the question is unless there is some drive to significant more bandwidth than what is the point of driving a lot more cost in the network.


PS - Looking at strictly the Access line speed is probably a really bad way to evaluate bandwidths, if done alone.  The other thing that should be factored in is the total bandwidth available across the platform (including any constraints from the backplane and uplinks).  Having 1 Gb/s access ports when you have 500 customers sharing a 1 Gb/s uplink does not really provide 1 Gb/s access to the customer.



cw.774 12/5/2012 | 3:59:23 PM
re: Partners in WDM-PON

why bollocks?

Balet 12/5/2012 | 3:59:19 PM
re: Partners in WDM-PON WDM PON is about 5 years away in US, plenty of bandwidth with just regular PON systems. Korea is different - government money and big guy's money...
paolo.franzoi 12/5/2012 | 3:59:19 PM
re: Partners in WDM-PON



The cost in PON systems IS the optics cost, particularly ONT optics cost.  The rest of it is pretty minimal - an SOC to connect to an Ethernet port.  As I have said before, one can get a GEPON or GPON indoor ONT that supports a GigE drop port for significantly under $100 - not make but buy for that price.

Other than that they are big Ethernet switches.




cw.774 12/5/2012 | 3:59:19 PM
re: Partners in WDM-PON

Thanks Seven.   But.. Forgeting for now the confusing 500 customers sharing an uplink scenario...

If we magically pull transcievers out of your fear and uncertainty of the system (e.g. dirty nasty ol' hardware) cost, what are we left with and how do they rate in you OP?

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