<p>AT&T INSTALLATION REQUIREMENT CHANGE NOTIFICATION - ATT-TP-76300-351 TO: ALL AT&T INSTALLATION SUPPLIERS Date: 07/01/2016</p><p>EFFECTIVE DATE: 5 days from posted date or as per Supplier’s Contract</p><p>Submitter’s Name: Don Mitrano</p><p>TP: TP76300 Subject: Running Fiber Optic Cable Action: Add: Modification: Delete: </p><p>Section: O Section Title: Fiber Optics Subsection: 2 Section Title: Running, Securing and Firestopping Fiber Optic Cable Subsection: 2.1 Subsection Title: Running Fiber Optic Cable </p><p>Prior to Change: 2.1.4 Fiber optic cable shall be run on either cable rack, basket rack or in metallic/terra cotta conduit throughout the AT&T facility. All horizontal cable rack shall be panned and horned which will allow the fiber to no longer be tied down.</p><p>Note: When cables are run on a vertical cable rack, cables shall be secured every strap (rung) and to the rungs only. </p><p>The use of “Y”/”U” horns and “L” brackets is no longer permitted except under the following conditions: a) In smaller offices like Huts the use of compartment horns is permitted where installing cable racking is cost prohibitive b) In those locations such as Legacy-T offices that don’t have any dedicated fiber cable racking and use the compartment horn exclusively for their routing needs. c) In those locations where there are pre-existing cable runs on compartment horns it is permitted to use these runs until they become exhausted</p><p>Post Change: 2.1.4 Fiber optic cable shall be run on either cable rack, basket rack or in metallic/terra cotta conduit throughout the AT&T facility. All horizontal cable rack shall be panned and horned which will allow the fiber to no longer be tied down on all new installations of cable racking and there is no need to upgrade any pre-existing racking with panning unless directed to do so by the IE.</p><p>When cables are run on a vertical cable rack, cables shall be secured every strap (rung) and to the rungs only.</p><p>When running cables on panned rack it is required that the cables be bundled together every 6 feet in order to keep the cables running straight.</p><p>The use of “Y”/”U” horns and “L” brackets is no longer permitted except under the following conditions: a) In smaller offices like Huts the use of compartment horns is permitted where installing cable racking is cost prohibitive b) In those locations such as Legacy-T offices that don’t have any dedicated fiber cable racking and use the compartment horn exclusively for their routing needs. c) In those locations where there are pre-existing cable runs on compartment horns it is permitted to use these runs until they become exhausted.</p><p>Note: In all locations where cable is still run on open ladder cable rack the previous method of securing the cable with wax cord every 4th rung shall still apply and be used.</p><p>Page 1 of 2 AT&T INSTALLATION REQUIREMENT CHANGE NOTIFICATION - ATT-TP-76300-351</p><p>Questions relative to this IRCN should be addressed to Serena Kwong at 925-398-0391.</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: 06-17-16 (Mike Cassidy)</p><p>Principal-Network Design Engineer (Subject Matter) Date: 06-16-16 (Mike Yeilding)</p><p>Release Approved Specialist – Technical Process/Quality Date: 07-01-16 (Serena Kwong) </p><p>Page 2 of 2</p>