NOTICE DATE: October 6, 2009 NOTICE TYPE: W-A100609-01 Operations SHORT DESCRIPTION: The ERCOT Market Operations Test Environment (MOTE) will be open for Daylight Savings Time (DST) testing INTENDED AUDIENCE: QSE Operations Personnel DAYS AFFECTED: October 20 and October 22, 2009 LONG DESCRIPTION: The ERCOT Market Operations Test Environment (MOTE) will be available for Market Participant testing on Tuesday, October 20, 2009, with a back-up testing day of Thursday, October 22, 2009. This testing will follow the simulated times shown in the table below. The MOTE will be unavailable on Monday, October 19, 2009, in order to prepare for the tests. If the back-up testing day is needed, MOTE will be unavailable on Wednesday, October 21, 2009, in order to prepare for the tests. MOTE DST Testing Real-time Simulated time 10/20/2009 08:00 10/31/2009 19:00 Start test; Day-Ahead and AS Market Opens 10/20/2009 10:00 10/31/2009 21:00 AS Market Close 10/20/2009 10:30 10/31/2009 21:30 Day-Ahead Market Close, run RPRS 10/20/2009 13:00 11/01/2009 00:00 Start of DST day 10/20/2009 15:00 11/01/2009 02:00 DST Transition Time 10/20/2009 16:00 11/01/2009 02:00d DST Second Hour 10/20/2009 18:00 11/01/2009 04:00 Close of Test Real-time Simulated time 10/22/2009 08:00 10/31/2009 19:00 Start test; Day-Ahead and AS Market Opens 10/22/2009 10:00 10/31/2009 21:00 AS Market Close 10/22/2009 10:30 10/31/2009 21:30 Day-Ahead Market Close, run RPRS 10/22/2009 13:00 11/01/2009 00:00 Start of DST day 10/22/2009 15:00 11/01/2009 02:00 DST Transition Time 10/22/2009 16:00 11/01/2009 02:00d DST Second Hour 10/22/2009 18:00 11/01/2009 04:00 Close of Test ADDITIONAL INFORMATION: Please refer to the latest version of the Market Participant Interface: XML document for additional information on Daylight Savings Time. If you need to request a copy of the document, please contact your ERCOT Account Manager. The URL for XML submissions will be: https://mostest.ercot.com/ercot-xml/servlet/Listener. The URL for portal submissions will be: https://testtml.ercot.com<https://testtml.ercot.com/>. The following are examples of how the 15-minute intervals for October 20, 2009, are labeled: ... 0100 0115 0130 0145 0200 0115d (DST 2nd hour) 0130d (DST 2nd hour) 0145d (DST 2nd hour) 0200d (DST 2nd hour) 0215 0230 0245 etc. and the hourly intervals are labeled as follows: ... 0100 0200 0200d (DST 2nd hour) 0300 0400. CONTACT: If you have any questions, please 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 e-mail at [log in to unmask]<mailto:[log in to unmask]>. If you are receiving e-mail from an ERCOT distribution list that you no longer wish to receive, please follow this link in order to unsubscribe from this list: http://lists.ercot.com<http://lists.ercot.com/>. dh