NOTICE DATE:  September 11, 2009

NOTICE TYPE:  M-B091109-01 Outage – NMMS

SHORT DESCRIPTION:  Network Model Management System (NMMS) outage on September 11, 2009

INTENDED AUDIENCE:  TDSPs / TSPs

DAY AFFECTED:  September 11, 2009, 10:29 AM – 1:45 PM

LONG DESCRIPTION:  From 10:29 AM until 1:45 PM on September 11, 2009, NMMS experienced an outage of the production system. Technical support has resolved the issue and NMMS is back in service.

CONTACT:  If you have any questions, please forward them to [log in to unmask] or contact your ERCOT Account Manager. You may also call the general ERCOT Client Services phone number at (512) 248-3900 or contact ERCOT Client Services via email at [log in to unmask].

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