Re: Transatlantic response times.

["Stephen J. Wilcox" <steve () opaltelecom co uk>]

London to NYC 70ms RTT

London to Seattle 150ms RTT

On Mon, 25 Mar 2002, Pistone, Mike wrote:

> I wasn't really sure where to post this, but I figured NANOG would have some
> insight or at least experience here.
>
> I was curious if anybody would share what they consider to be average or
> acceptable transatlantic ping response times over a T1.
> I know there are tons of variables here, but I am looking for ballpark
> figures.
> Assume that utilization on the circuit is extremely low, and you are
> measuring point to point across the line.  You can also assume no other
> bottlenecks effecting the response times (router performance, or what not).
> Should you see a ~150ms trip?  250ms?  450ms???
>
> Also,  if possible, include the to and from info.  Obviously  NYC to London
> is a bit different than Dallas to Prague or something.   
>
> Is there any equation to estimate response times?  For example, if your
> circuit from A to Z has a 500ms avg response, than that equates to a circuit
> distance of aprox. 5000 miles or something?
>
> Thanks in advance,
>
>
> Mike

-- 
Stephen J. Wilcox
IP Services Manager, Opal Telecom
http://www.opaltelecom.co.uk/
Tel: 0161 222 2000
Fax: 0161 222 2008