ISE Magazine, October 2018

OCTOBER 2018 WWW ISEMAG COM 11 OSP EXPERTpatterns of symptoms indicate that the root cause of the section failure is a wet splice or encapsulation Had the DMM shown solid shorts and solid ring and tip grounds we would have suspected shield damage which could be pinpointed with the earth frame in a matter of minutes RFL measurements showed the wet splice at 100 feet from the test point the TDR showed the splice at 100 feet and the earth frame confirmed it Business plans to repair or replace faulted sections will heal your wounded copper infrastructure and will allow you to provide quality bandwidth and other services on your existing copper network until the copper network is replaced Signing off If your company has a well established proactive plan let me know about it I like to write positive columns about good work thats happening If you have a case of trouble that you are struggling with call me and we can brainstorm solutions If we can write about it anonymously is fine then others can learn from your situation Contact me at dmccarty@ mccartyinc com or call 8318183930 The first example was a 700 foot section of a 100 pair single sheath air core PIC cable Testing several vacant cable pairs showed crossed battery and high resistance grounds on ring conductors only Most tip conductors tested clear This is an indication of water in a section To confirm this finding the bond was removed on both ends of the section and the isolated shield was tested to ground 15 volts DC on the shield confirmed our suspicions When measuring a vacant open pair the test set open meter showed 1100 feet of cable in the section Water shorts the capacitance of the cable pair causing the open meter to read long When using the RFL feature faults measured random distances from around 200 feet to 500 feet in the section The TDR showed water starting at 200 feet from one end and 500 feet from the other end This is a business case for a section replacement From this point on it is up to engineering and the management team No more measurements are needed The second example was a 300 foot section of a filled 25 pair cable Testing cable pairs with the DMM showed high resistance grounded and shorted cable pairs with crossed battery on both tip and ring to ground These PRODUCT SHOWCASE FTTH Pole Mount Terminal Charles Industries CFIT SL terminal is an ideal solution for distributed tap FTTH architectures The CFIT SL used in conjunction with Charles Optical Tap Trays provides a flexible platform for delivering broadband services in a rural setting The compact size of the CFIT SL allows for easy single technician installation and its slim profile makes it an ideal pole or wall mount FTTH distribution solution It is constructed out of lightweight aluminum with an off white coated finish Cable entry grommets and internal strain relief provide fiber management while protecting your investment It also serves as a rugged splice enclosure for up to 144 fiber strands Charles Industries Tel 8478066300 www charlesindustries com o Field Engineering As Builds New Build o Plant Audit Services o Pole Loading and Clearances Services Make Ready Survey o HFC Design o Fiber to the Home System Design o Fiber Optic Interconnect Design o Digitizing Services Paper to CAD Updates o Permitting DOT County Railway o Commscope Certified Design Firm Software Supported SPIDA Calc Pole Loading Software Osmose OCalc Pro Pole Loading Software Lode Data Design Assistant and Drafting Esri Arc GIS AutoCAD SpatialNET Crescent Link Chris Kramer Tel 6367571623 ckramer@ spectrumplanning com www spectrumplanning com