Our IP Performance WWW site contains the results of round-trip delay and loss measurements which we perform between key locations on our IP Backbone Network, and to key locations on the networks of our strategic partners. Several of the pages on this site are updated hourly and thus reflect the current state of our network; other pages are there to provide a more historical view of the performance of our core network.

The following table contains the average PoP-to-PoP round-trip delay values (in ms) and percentage loss values for the BT Global Services Dallas Node on 05 January 2009.

TO	Delay	Loss		TO	Delay	Loss
Amsterdam	124	0.0		Madrid	146	0.0
Barcelona	157	0.0		Milan	144	0.0
Brussels	132	0.0		Munich	141	0.0
Dublin	133	0.0		Paris	125	0.0
Dusseldorf	140	0.0		Stockholm	157	0.0
Frankfurt	133	0.0		Vienna	152	0.0
London	117	0.0		Zurich	142	0.0

Click on one of the links below to access daily round-trip delay and percentage loss statistics for other nodes within North America.

Chicago	New York	Washington
Los Angeles	San Francisco

Detailed round-trip delay and loss statistics to/from a larger number of cities within Europe, Asia Pacific, and Latin America are also available.

Click here to return to the network details for the whole BT Global Services IP Backbone.

Notes
1) Each delay/loss value is colour-coded according to the acceptability of the result.
	Low delay/loss		High delay/loss
2) Further details of the measurements can be found by clicking on the "more information" button on the side navigation bar.