Ciena (CIEN) Message Board

STOCKTALK

We've detected that you're using an ad content blocking browser plug-in or feature. Ads provide a critical source of revenue to the continued operation of Silicon Investor. We ask that you disable ad blocking while on Silicon Investor in the best interests of our community. If you are not using an ad blocker but are still receiving this message, make sure your browser's tracking protection is set to the 'standard' level.

Technology Stocks : Ciena (CIEN)

CIEN 178.17

+1.0%

Nov 21 4:00 PM EST

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next

To: Little Investor who wrote (1903)	4/12/1998 4:37:00 PM
From: Tim Bagwell	Read Replies (1) of 12623

<<Can you elaborate on what you mean by 16 channels of OC-192? Are they using 16 channel WDM equipment from Nortel with fiber that supports OC-192 to get 16 times the bandwidth of STS-192 (10 x 16 = 160 Gb/s)?>> Yes. You have it correct. OC-192 (the optical equivalent of STS-192) is 10 Gb/s which is supported better by the type of fiber that QWST has installed. Their fiber is the Truewave fiber from Lucent which is of the type known as non-zero dispersion shifted. This fiber gives a small but managable amount of dispersion in the WDM band which is desirable to keep certain non-linear effects under control. FWIW, the new LEAF fiber used by Level-3 will be slightly better than the Truewave fiber but it's a small advanatage and the cost benefit may or may not be there. Most LEAF fiber is manufactured by Corning. The Nortel WDM equipment supports 16 different channels (or wavelengths) spaced at 200 GHz (~1.6 nm) with each channel operating at a data rate of 10 Gb/s. They use a SONET transport protocol with an IP routing protocol on top.

Report TOU Violation

Share This Post

Public Reply Prvt Reply Mark as Last Read File

Previous 10 Next 10 Previous Next