NOTICE DATE: October 8, 2008 NOTICE TYPE: W-A100808-01 Operations - Testing SHORT DESCRIPTION: The ERCOT Market Operations Test Environment (MOTE) will be open for Daylight Savings Time testing. INTENDED AUDIENCE: QSE Operations Personnel DAYS AFFECTED: October 14, 2008 and October 16, 2008 LONG DESCRIPTION: In accordance with the Energy Policy Act of 2005, Daylight Savings Time (DST) was extended by one month starting in 2007. DST ends on Sunday, November 2, 2008. The ERCOT Market Operations Test Environment (MOTE) will be available for Market Participant testing on Tuesday, October 14, 2008, with a back-up testing day of Thursday, October 16, 2008. This testing will follow the simulated times shown in the table below. The MOTE will be unavailable on Monday, October 13 and Wednesday, October 15, 2008 in order to prepare for the tests. MOTE DST Testing Real-time Simulated time 10/14/2007 08:00 11/1/2008 19:00 Start test; Day Ahead and AS Market Open 10/14/2007 10:00 11/1/2008 21:00 AS Market Close 10/14/2007 10:30 11/1/2008 21:30 Day Ahead Market Close, run RPRS 10/14/2007 13:00 11/2/2008 00:00 Start of DST day 10/14/2007 15:00 11/2/2008 02:00 DST Transition Time 10/14/2007 16:00 11/2/2008 02:00d DST second hour 10/14/2007 18:00 11/2/2008 04:00 Close of test Real-time Simulated time 10/16/2008 08:00 11/1/2008 19:00 Start test; Day Ahead and AS Market Open 10/16/2008 10:00 11/1/2008 21:00 AS Market Close 10/16/2008 10:30 11/1/2008 21:30 Day Ahead Market Close, run RPRS 10/16/2008 13:00 11/2/2008 00:00 Start of DST day 10/16/2008 15:00 11/2/2008 02:00 DST Transition Time 10/16/2008 16:00 11/2/2008 02:00d DST second hour 10/16/2008 18:00 11/2/2008 04:00 Close of test ADDITIONAL INFORMATION: Please refer to the latest version of the Market Participant XML Interface document for additional information on Daylight Savings Time. 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/> . Please refer to the latest version of the Market Participant XML Interface document for additional information on Daylight Savings Time. The 15 minute intervals for November 3, 2008 are labeled as follows: ... 0130 0145 0200 0115d 0130d 0145d 0200d 0215 etc. and the hourly intervals are labeled as follows: ... 0100 0200 0200d 0300 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] 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/> . kd