opticalwatcher 12/5/2012 | 3:38:33 PM
re: Tellabs Lays Out WDM-PON Plan Ring based PON?
cw.774 12/5/2012 | 3:38:31 PM
re: Tellabs Lays Out WDM-PON Plan Yea tera, that's a good question.

Are links P2P or P2MP? And what to compare to? Public information like ADC WDM PON seams to say it's everything... whatever you want it to be. But what is Tellabs really considering? Maybe they don't know yet... it's all customer dependant for now. Maybe they just need to sound positive on the PON front. Good Q!
opticalwatcher 12/5/2012 | 3:38:30 PM
re: Tellabs Lays Out WDM-PON Plan Looking at the Sardana fact sheet:

It looks like a 1.2 terabit WDM ring to connect a bunch of remote nodes to the CO. Each remote node pulls off a 10Gig wavelength and implements a 10Gig PON (which they call a 'TDM tree' in the document).

Wild. From my non-expert eyes, it looks pretty expensive, which I guess would be good for Tellabs.
cw.774 12/5/2012 | 3:38:20 PM
re: Tellabs Lays Out WDM-PON Plan Thanks, tera.

From my optical <bottom> layer perspective, it looks like a plan to throw all well-known optical technologies at a PON ala SDH/SONET LH. The remote node seams like a ROADM. Known DWDM tech. like AWG's, Ext. Mod and DML laser sources, OA's are EDFA and RAMAN.
Very wide open though. No mention of seed light sources and monochromatic ONT trasnceivers for low cost here. You gotta love Europe.</bottom>
bollocks187 12/5/2012 | 3:38:17 PM
re: Tellabs Lays Out WDM-PON Plan Fishy to say the least.

The problem with GPON ONTS is they continue to be TOO expensive and OFFER no long term cost reductions.

ACCESS is supposed to be simple - KISS
jmlspt 12/5/2012 | 3:37:46 PM
re: Tellabs Lays Out WDM-PON Plan Sardana project is pure research trying to reach the product stage. IMO, we are still in a very early stage in the access network revamping to start thinking about Sardana-like proposals (5-10 years from now is probably more realistic).
Considering the current optical equipment costs and the revenue obtained by operators, the access network transition will be slow with moderate fiber deployments.
rs50terra 12/5/2012 | 3:37:42 PM
re: Tellabs Lays Out WDM-PON Plan Let's get real. The ultimate solution is P2P. With CO-based splitter deployments the infrastructure is identical to P2P and P2P can use standard 1GE transceivers, thus satisfying any foreseeable need.
Fan-dorin 12/5/2012 | 3:37:21 PM
re: Tellabs Lays Out WDM-PON Plan First lets see what is the limitation of G/E- PON: capacity, distance, IP oriented service lack of tdm providing)
from other side WDM: capcity and distance focus!

How about CWDM, quite cheap, capacity up to 18 walength per fiber pair (every 2.5G), passive mode possible up to 80 km ptp. Mature standard.

competion IP+CWDM vs GPON?
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