GPON Gets a 10G Look
Filed in:
10GPON,
Ericsson,
GPON,
Hybrid PON,
trade show
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3 Comments:
It's hard to believe that so many media outlets would just pass through a headline about 10G PON without doing any investigation.
This is not 10G PON, this is what the industry refers to as "hybrid PON" - multiple downstream wavelengths at GPON rates (2.4G).
The IEEE standards (due to complete in 2009) and the FSAN recommendations (white paper due late this year or early 2009, ITU standard in ~2010) both have settled the issue of the physical layer implementation of next generation PON. Both standards have stated that the first standard NG PON will be a single wavelength running at 10Gbps downstream. The upstream is still under debate (1G and 10G in IEEE; 1.2G, 2.4G and 10G in FSAN).
Fujitsu pushed a CWDM version of Hybrid PON over a year ago. Alcalu has been promoting their DWDM version to the carriers for at least a year. NSN has a version as well. Hybrid PON as an interim step between GPON and 10G PON is nothing new.
What's new is calling hybrid PON "10G PON" ... and getting away with it.
Hi,
I am one of the makers of the system and can confirm that this system is not hybrid; it runs 10G scrambled NRZ on a single lambda using the G.984.3 GEM/GTC specs at four times the speed of a regular GPON.
Br,
Elmar Trojer, Ericsson Research Sweden
Elmar.Trojer@Ericsson.com
Elmar,
Thank you very, very much for your clarification. Apparently either your media contact was unclear or the LightReading reported made some assumptive leaps. The linked article clearly states that 4 wavelengths were used.
A true 10G is significantly more impressive.
Scott
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