<p>AT&T ENGINEERING REQUIREMENT CHANGE NOTIFICATION - ATT-TP-76400-156 TO: ALL AT&T ENGINEERING SUPPLIERS Date: 01/05/2016</p><p>EFFECTIVE DATE: 5 days from posted date or as per Supplier’s Contract</p><p>Submitter’s Name: Charles Matlack</p><p>TP: TP76400 Subject: Protected AC Load Action: Add: Modification: Delete: </p><p>Section: 12 Section Title: Power Systems Subsection: 7 Section Title: Inverters and UPS Systems Subsection: 7.1 Subsection Title: General</p><p>Prior to Change: 7.1.1 If the AC load is identified as “protected”, it shall be fed from a PPSC from an inverter plant or Uninterruptible Power System (UPS), as determined by the AT&T Engineer.</p><p>Post Change: 7.1.1 If the AC load is identified as “protected”, it shall be fed from a PPSC from an inverter plant or Uninterruptible Power System (UPS).</p><p>Questions relative to this ERCN should be addressed to Serena Kwong at 510-796-1097</p><p>Serena Kwong Specialist - Technical Process/Quality [email protected] Access the TP's on the Extranet Site - https://ebiznet.sbc.com/sbcnebs</p><p>Concurred Area Mgr Eng Network Quality Implementation Eng & Common Systems Date: 12-11-15 (Mike Cassidy)</p><p>Principal – Product Development Engineer (Subject Matter) Date: 11-30-15 (Charles Matlack)</p><p>Release Approved Specialist –Technical Process /Quality Date: 01-05-16 (Serena Kwong) </p><p>Page 1 of 1</p>