ISE Magazine, August 2019
AUGUST 2019 WWW ISEMAG COM 67 NG PONPON technologies as they support more customers delivering more bandwidth The key is to have the right tools to ensure proper testing to avoid bad surprises and expensive troubleshooting after the fact n Guillaume Lavallee is a Product Line Manager at EXFO He oversees the optical products in the Installation and Maintenance division He has more than a decade of experience in telecom test and measurement related technologies and best practices For more information please visit https www exfo com Follow EXFO and Lavallee on Twitter @ EXFO Figure 4 NG PON2 a next generation PON technology uses bandwidth to send multiple wavelength dependent signals downstream that detector provides the total of both giving the user no way of knowing if one or the other wavelength therefore the service is working properly Each technology has its own set of upstream and downstream wavelengths But since multiple technologies can co exist a test tool that can discriminate between all these wavelengths and technologies is now required one that can still detect several burst modes as well as offer pass through capability Furthermore NG PON2 a next generation PON technology while having a specific wavelength band uses bandwidth to send multiple wavelength dependent signals as shown in Figure 4 This is called wavelength division multiplexing PON WDM PON in a very narrow transmission band This process can significantly increase the number of wavelengths downstream And again each one needs to be measured individually with a pass through device and at reasonable cost to the operator Cost reduction is made easier since not all the capabilities of a full blown optical signal analyzer OSA are required for FTTH deployments One such tool is EXFOs PPM 350D next generation PON power meter It can test both legacy and next generation PON technologies EPON GPON XG PON XGS PON 10G EPON NG PON2 Its PON aware technology automatically detects the PON technology in use either legacy or next generation and applies the related thresholds eliminating the confusion multiple coexisting wavelengths can cause in order to deliver error free testing Next generation PON technologies are an advantageous evolution of current
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