***** EXTERNAL email. Please be cautious and evaluate before you click on links, open attachments, or provide credentials. ***** NOTICE DATE: March 15, 2018 NOTICE TYPE: W-A031518-01 Operations SHORT DESCRIPTION: Planned Maintenance Outage INTENDED AUDIENCE: ERCOT Wide Area Network Participants (QSEs and TSPs) DAY AFFECTED: March 20, 2019 09:00 - 15:00 LONG DESCRIPTION: ERCOT will be performing infrastructure hardware patching at our Taylor, Texas facility on Tuesday, March 20, 2018 09:00 - 15:00. During the maintenance window, the following system will be impacted: ********* ICCP (Telemetry data) out of Taylor will be unavailable but redundancy is available in Bastrop. 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 email at [log in to unmask]<mailto:[log in to unmask]>. If you are receiving email from a public 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. sa