CLS to CLS Latency info

Mike Hammett nanog at
Tue Oct 30 14:29:56 UTC 2018

The speed of light through fiber is about 2/3 the speed of light through a vacuum. This is why HFT prefers microwave over fiber when it comes to latency. 

Mike Hammett 
Intelligent Computing Solutions 

Midwest Internet Exchange 

The Brothers WISP 

----- Original Message -----

From: "Ben Cannon" <ben at> 
To: "Mehmet Akcin" <mehmet at> 
Cc: "nanog" <nanog at> 
Sent: Tuesday, October 30, 2018 2:59:48 AM 
Subject: Re: CLS to CLS Latency info 

I’d be astonished if they varied much from lightspeed. 


On Oct 29, 2018, at 8:11 PM, Mehmet Akcin < mehmet at > wrote: 

Hello there 

I have been searching for CLS (Cable Landing Station) to CLS latency infirnation for submarine cables. I was able to identify only a handful of them via sales catalogs. I am still missing like 320~ systems, does wnyone have this info available? 

If i can’t find the data, i am going to formulate from lentgh of fiber diveded by speed of light on fibre (~ +\- resistance) but I really would prefer actual ping ;) 

This is for project. Thank you in advance! 

Mehmet -- 


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