trans-Atlantic latency?

Jim Segrave jes at
Fri Jun 29 10:37:14 UTC 2007

On Thu 28 Jun 2007 (18:20 -0500), Neal R wrote:
>   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 ...

He'll need a Black & Dekker drill with a hammer attachment, and an
absolutely prodigious stone cutting bit, a convenient wormhole, or a
waiver on the laws of physics.

Jim Segrave           jes at

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