This is simply a NEBS FYI regarding a new technical update posted by Verizon regarding the Exemption to testing intra-building lightning requirements in section 4.5.9 of GR-1089-CORE Issue 2 and 4.6.9 of GR-1089-CORE issue 3. Per Verizon, they do not permit intra-building interfaces to utilize shields grounds on both ends if the equipment may be installed in a C.O. Thus this exemption is not permitted within Verizon. Many vendors currently use this exemption to eliminate the need to test for lightning on interfaces such as 10/100 baseT Ethernet and Giga-bit Ethernet. Verizon has still not accepted Issue 3, but it is still under review, however IF they do accept issue 3, they will not allow manufacturers to exempt the test and state in the I&M's that the shield must be grounded at both ends. The requirement in issue 2 is the same as issue 3 , however documenting the grounding at both ends is not required as part of the lab evaluation for conformance. Issue 3 simply requires (in addition to the issue 2 requirements) that manufacturers are required to document that they must have both ends grounded if they use the exemption. See attached for more info: http://www.verizonnebs.com/technical.html <http://www.verizonnebs.com/technical.html>
Jim Jim Wiese NEBS Project Manager/Senior Compliance Engineer ADTRAN, INC. 901 Explorer Blvd. P.O. Box 140000 Huntsville, AL 35814-4000 256-963-8431 256-963-8250 fax jim.wi...@adtran.com
