{"id":1223,"date":"2021-04-16T10:15:13","date_gmt":"2021-04-16T10:15:13","guid":{"rendered":"https:\/\/www.clooms.com\/?p=1223"},"modified":"2023-01-16T06:50:06","modified_gmt":"2023-01-16T06:50:06","slug":"xgs-pon","status":"publish","type":"post","link":"https:\/\/www.clooms.com\/xgs-pon\/","title":{"rendered":"XGS-PON: The PON Bringing Unprecedented Power to FTTH Nets"},"content":{"rendered":"\n
Thanks to 4K TV<\/a> and OTT video<\/a>, the need for higher capacity bandwidth has compelled network operators to place 10G GPON standards on their agenda. Hence, starting with XG-PON, the industry is now looking at XGS-PON as the next step in the construction of high-capacity networks. In this regard, let\u2019s see how XGS-PON satisfies the requirement for ever greater broadband capability, speed profiles, and symmetrical transmission.<\/p>\n\n\n XGS-PON is a 10G GPON standard that provides symmetric data transmission. Therefore, the maximum line rate for both downstream and upstream is 9.953 Gbps (also termed as 10\/10G). <\/p>\n\n\n\n In order to better understand XGS-PON, it would be useful to look at its predecessors PON, GPON, and 10G GPON. PON is a point to the multi-point passive optical network<\/a>. GPON is a gigabit PON and is today the most popular mainstream optical access technology standard. 10G GPON builds on GPON tech and has two standards. That is, XG-PON and XGS-PON. While XGS-PON delivers symmetric transmission, XG-PON is asymmetric. That implies, unlike XGS-PON which is 10\/10G, XG-PON has a maximum downstream line rate of 9.953Gbps but a maximum upstream of 2.488Gbps (and is therefore deemed 10\/2.5G).<\/p>\n\n\n Though the data formatting and physical fiber conventions for XGS-PON systems are the same as the original GPON standard, the wavelengths have changed. Thus, XGS-PON has an upstream wavelength of 1270 nm and a downstream wavelength of 1577 nm. <\/p>\n\n\n The reasons for this shift include: <\/p>\n\n\n\n To measure XGS-PON wavelengths, you can use conventional optical power meters<\/a> such as optical time-domain reflectometer (OTDR)<\/a> or broadband power meter. However, these do have limitations since they were not originally designed with PON in mind. Instead, you will get better results with purpose-built, dedicated PON power meters<\/a>. These special meters can test optical power in different wavelengths and directions simultaneously.<\/p>\n\n\n GPON and 10G-PON standards have a lot in common but there are defining differences.<\/p>\n\n\n\n *The physical reach is defined by fiber quality, optical module size, and split ratio.<\/em><\/p>\n\n\n\n **The actual split ratio is dependent on the fiber distance and optical module model.<\/em><\/p>\n\n\nTable of Contents<\/h2>\n
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1. What is XGS-PON?<\/strong><\/h2>\n\n\n
2. XGS-PON Wavelength, Reasons, and Measurement<\/strong><\/h2>\n\n\n
Reasons for XGS-PON Wavelength<\/strong><\/h3>\n\n\n
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XGS-PON Wavelength Measurement<\/strong><\/h3>\n\n\n
3. The Differences Between GPON vs XG-PON vs XGS-PON<\/strong><\/h2>\n\n\n
Specifications<\/strong><\/td> GPON<\/strong><\/td> 10G-PON<\/strong><\/td><\/tr> XG-PON<\/strong><\/td> XGS-PON<\/strong><\/td><\/tr> Wavelength<\/strong><\/td> The Downstream: 1480-1500 nmUpstream: 1290-1330 nm<\/td> Downstream 1575-1580 nmUpstream 1260-1280 nm<\/td> Downstream 1575-1580 nmUpstream 1260-1280 nm<\/td><\/tr> Maximum Line Rate<\/strong><\/td> Downstream: 2.488GbpsUpstream: 1.244Gbps<\/td> The Downstream: 9.953GbpsUpstream: 2.488Gbps<\/td> Downstream: 9.953GbpsUpstream: 9.953Gbps<\/td><\/tr> Maximum Physical Transmission Distance<\/strong><\/td> 60 kilometers*<\/td> 100 kilometers*<\/td> 100 kilometers*<\/td><\/tr> Maximum Split Ratio<\/strong><\/td> 1:128**<\/td> 1:256**<\/td> 1:256**<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n 4. Main Advantages of XGS-PON<\/strong><\/h2>\n\n\n