New TransPacific Cable Projects:

Rod Beck Rod.Beck at
Mon Sep 24 18:56:35 UTC 2007

Here is a TeleGeography news article worth a quick read:

It appears that that article assumes that capacity will not be increased by
WDM products...have those that been applied on those links already reached
the cables' maximum capabilities based on current technology?


I think you are going to find that the numbe of waves that can put on an undersea fiber is a function of the distance between the landing stations. Obviously most TransPacific cables traverse greater distances and hence probably cannot carry as many waves as TransAtlantic cables. 

There is also a need for cables that are diverse from the existing cables. So lighting more capacity will not solve the physical diversity problems that were highlighted by the December earthquakes. 

Most modern undersea cables have four fiber pairs per cable. And each of those fiber pairs can handle from 24 to 80 10 gig waves. 

Hibernia can do 80 10 gig waves, but only becuase we replaced the undersea DWDM kit deployed at our landing stations. 


- Roderick. 

This e-mail and any attachments thereto is intended only for use by the addressee(s) named herein and may be proprietary and/or legally privileged. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this email, and any attachments thereto, without the prior written permission of the sender is strictly prohibited. If you receive this e-mail in error, please immediately telephone or e-mail the sender and permanently delete the original copy and any copy of this e-mail, and any printout thereof. All documents, contracts or agreements referred or attached to this e-mail are SUBJECT TO CONTRACT. The contents of an attachment to this e-mail may contain software viruses that could damage your own computer system. While Hibernia Atlantic has taken every reasonable precaution to minimize this risk, we cannot accept liability for any damage that you sustain as a result of software viruses. You should carry out your own virus checks before opening any attachment

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <>

More information about the NANOG mailing list