{"id":515,"date":"2013-08-03T05:38:14","date_gmt":"2013-08-03T02:38:14","guid":{"rendered":"https:\/\/telcocloudbridge.com\/?p=515"},"modified":"2013-08-03T05:38:14","modified_gmt":"2013-08-03T02:38:14","slug":"what-is-it-that-operators-miss-on-100g-optics","status":"publish","type":"post","link":"https:\/\/telecomlighthouse.com\/blog\/what-is-it-that-operators-miss-on-100g-optics\/","title":{"rendered":"What is it that Operators miss on 100G Optics ?"},"content":{"rendered":"

What\u00a0 is it that\u00a0 operators miss on 100G optics\/transponders ?<\/p>\n

Is it reach, cost or availability \u00a0?<\/p>\n

In fact none of them.Telecom Lighthouse<\/a><\/p>\n

We have Coherent optics that can span thousands of kilometers, and we have prices getting\u00a0competitive\u00a0reasonably, so what is it that\u00a0\u00a0operators would still want on 100g optics. Read further.<\/p>\n

What operators\u00a0want,\u00a0is an efficient\u00a0\u00a0solution for metro applications; more specifically, pluggable type of “Coherent transceiver” for the network( line)\u00a0side of DWDM . The bulky and power-hungry coherent\u00a0transceiver\u00a0today is suitable for long haul applications but not for \u00a0metro applications. Deploying them for metro applications ( lets say 100 KM or even more) is \u00a0an overkill for price, space and power.<\/p>\n

Let me show you where is the gap today:<\/p>\n

Link distances > 2000 KM:<\/strong><\/p>\n

We have,today, coherent line side transceiver that can span 2000 KM or more. OIF ( Optical Interworking\u00a0Forum) did a good job of standardizing the modulation scheme as\u00a0 PM-QPSK\u00a0in addition to\u00a0size ( 5 x 7 inches) and power requirements ( 80 watts). \u00a0This considerable\u00a0power requirement comes because of\u00a0 the ASIC inside transceiver that uses DSP for demodulation and link equalization of received signal. In addition, it performs Analog to Digital conversion ( ADC), Digital to Analog converter ( DAC) and also\u00a0SD-FEC processing.\u00a0All these functions, naturally, call for considerable power requirements\u00a0for processing purpose.<\/p>\n

Link distances <40 KM:<\/strong><\/p>\n

Here we talk about the client side\u00a0transceiver usually CFP which is a pluggable type. IEEE has standardized 100base-LR4\u00a0that cover distance up to 10 KM and 100base-ER4 that can go up to 40 KM. These CFP have much better power requirements i.e. in the range of 32 watts. It means that it would not be possible to deploy it for any reach beyond 40 KM. ( At the time of this writing, one vendor is claiming to have developed CFP for distance up to 80 KM).<\/p>\n

The Gap:<\/strong><\/p>\n

So where are we left when we have a requirement to have a\u00a0DWDM reach for 100 KM for metro applications or lets say a few hundred Kilometers\u00a0, the only solution would be to go with the coherent based fixed optics since CFP does not offer that reach. All this at a price of power, size and cost.<\/p>\n

Lets take each of them one by one:<\/p>\n

Size:<\/strong><\/p>\n

The Size needs to be\u00a0smaller so that multiple 100Gs can be\u00a0accommodated on single line card. The issue with the metro application is always one of space. The transponder needs to be\u00a0space efficient and should be able to accommodate multiple 100gs.<\/p>\n

Power:<\/strong><\/p>\n

The power needs to be equal to that of a typical CFP applications eg. 32 watt since the fixed optics today consume power as high as 80 watts. Installing huge number of coherent transponders in metro would call for huge power requirements.<\/p>\n

Price:<\/strong><\/p>\n

The price needs to be\u00a0attractive for mass deployment because metro market is cost sensitive. This is a direct benefit of using CFP\/pluggable on DWDM side which will result in lowering prices.<\/p>\n

What is status today in the market ?<\/p>\n

Earlier Ocalaro Inc was the first one to announce\u00a0 Coherent CFP2 \u00a0in March this year (2013), followed by Sumitomo who also announced the launch of coherent based CFP2. However mass development of the new CFP2 will still not be\u00a0\u00a0before mid of 2014.<\/p>\n

The other vendors need to catch up and push their roadmaps.\u00a0Equipment vendors\u00a0would need aggressive roadmaps for\u00a0 integrating new coherent CFPs into their transponders thus pushing the efficiency of 100G to next level.<\/p>\n

What is a message for operators today in the absence of the metro Coherent\u00a0optics.<\/p>\n

For the moment, operators have to live with the current coherent based optics for their metro applications.\u00a0 There are some vendors that provide\u00a0a cost optimized coherent transponder for metro applications. It is worth looking at those options. If cost is a big driver then there are some solutions in market for non coherent 100G solutions that are cost\u00a0effective\u00a0but I would rather recommend to wait for the next wave of Coherent CFPs. I am of the view of having a larger eco system around Coherent based optics rather than keeping two different technologies for 100G. I have touched on this issue in the following post.<\/p>\n

https:\/\/telecomlighthouse.com\/is-there-a-room-for-100g-non-coherent-systems\/<\/a><\/p>\n

Do let me know, what are your views on this issue and\u00a0how would you go ahead with your metro 100G applications.<\/p>\n

[mailchimpsf_form]<\/p>\n","protected":false},"excerpt":{"rendered":"

What\u00a0 is it that\u00a0 operators miss on 100G optics\/transponders ? Is it reach, cost or availability \u00a0? In fact none of them.Telecom Lighthouse We have Coherent optics that can span thousands of kilometers, and we have prices getting\u00a0competitive\u00a0reasonably, so what is it that\u00a0\u00a0operators would still want on 100g optics. Read further. What operators\u00a0want,\u00a0is an efficient\u00a0\u00a0solution […]<\/p>\n","protected":false},"author":1,"featured_media":762,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-515","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-transport"],"_links":{"self":[{"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/posts\/515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/comments?post=515"}],"version-history":[{"count":0,"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/posts\/515\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/media\/762"}],"wp:attachment":[{"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/media?parent=515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/categories?post=515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/telecomlighthouse.com\/wp-json\/wp\/v2\/tags?post=515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}