trans-Atlantic latency?

Fri Jun 29 09:29:52 UTC 2007

I used to get about 60ms from router to router in TAT12/13 (I think) 
from London Telehouse to NY Telehouse.

Security Admin (NetSec) wrote:
> Sprint has probably the lowest latency in the industry; I use them for a Los Angeles - London IPSec VPN.  Typical latency is around 140-150 ms rt (70-75 ms one-way)
>
> 40 ms RT is not possible in this reality, unless the speed of light is increased or one transimits through subspace (see Star Trek)
>
>
> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu] On Behalf Of Neal R
> Sent: Thursday, June 28, 2007 4:21 PM
> To: nanog at merit.edu
> Subject: trans-Atlantic latency?
>
>
>
>   I have a customer with IP transport from Sprint and McLeod and fiber
> connectivity to Sprint in the Chicago area. The person making the
> decisions is not a routing guy but is very sharp overall. He is
> currently examining the latency on trans-Atlantic links and has fixed on
> the idea that he needs 40ms or less to London through whatever carrier
> he picks. He has spoken to someone at Cogent about a point to point link.
>
>
>     What is a reasonable latency to see on a link of that distance? I
> get the impression he is shopping for something that involves dilithium
> crystal powered negative latency inducers, wormhole technology, or an
> ethernet to tachyon bridge, but its been a long time (9/14/2001, to be
> exact) since I've had a trans-Atlantic circuit under my care and things
> were different back then.
>
>
>       Anyone care to enlighten me on what these guys can reasonably
> expect on such a link? My best guess is he'd like service from Colt
> based on the type of customer he is trying to reach, but its a big
> muddle and I don't get to talk to all of the players ...
>
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>
>   