NOTICE DATE: February 15, 2010 NOTICE TYPE: M-A021510-01 INITIAL: MOS Listener INTENDED AUDIENCE: All Market Participants DAY AFFECTED: February 14, 2010 from 6:35 AM to 7:08 AM DESCRIPTION: An unplanned outage was experienced with the MOS Listener on February 14, 2010 from 6:35 AM to 7:08 AM. The MOS Listener is now operational. Additional information will be provided as it becomes available. 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/>. JR/JA/AD