{"id":27425,"date":"2024-06-27T09:21:08","date_gmt":"2024-06-27T13:21:08","guid":{"rendered":"https:\/\/www.precisionot.com\/?p=27425"},"modified":"2024-09-09T12:08:45","modified_gmt":"2024-09-09T16:08:45","slug":"400g-zrx-explora-las-posibilidades","status":"publish","type":"post","link":"https:\/\/www.precisionot.com\/es\/400g-zrx-explore-the-possibilities\/","title":{"rendered":"400G ZRx Parte 1: Explora las posibilidades"},"content":{"rendered":"\t\t
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400G ZRx optics are a family of pluggable coherent DWDM transceivers where the ZRx term refers to design variations including different types of Tx power, Forward Error Correction (FEC), data rates, and applications.\u00a0 400G ZRx transceivers in QSFP-DD, OSFP or CFP2 form factors enable deployment directly in IP routers\/switches, facilitating long haul connectivity over a DWDM network (IPoDWDM) without the need of going through specific transport equipment.\u00a0\u00a0\u00a0 The most recent advances of packaging full coherent technologies into QSFP-DD or OSFP form factors allow these optics to consume less power per optic as well as increase the amount of transceivers per rack unit deployed in a host, all of which helps lower the total cost per 100G.\u00a0\u00a0<\/p>

400G ZRx Standards Variations:\u00a0\u00a0 How We Got Here<\/span><\/b>\u00a0<\/span><\/h2>

There have been several efforts over the last 10-15 years to integrate the capabilities of 400G transport equipment into a pluggable form factor.\u00a0 <\/span>Back in 2016, the Open ROADM <\/span>initiative was created by a consortium of telecom industry leaders to promote open, interoperable, and programmable optical networks. Its development was driven by Internet Service Providers (ISPs) and the need to overcome vendor lock-in, reduce costs, and enhance network efficiency through standardization and collaboration.\u00a0 The main goal of Open ROADM was in support of transport backbone networks and metro applications, with multi-rate 100G-400G (both Ethernet and OTN protocols) + oFEC (Open FEC) and reach in the 100s of kilometers with amplification.\u00a0 The earlier implementations of Open ROADM transceivers were mainly in a CFP2 form factor but it now has also been implemented in QSFP-DD\/OSFP form factors.<\/span>\u00a0<\/span><\/p>

\"400G<\/p>

C<\/span>oncurrently<\/span>,<\/span> the <\/span>OIF<\/span> (Optical Internetworking Forum)<\/span> <\/span>400ZR<\/span><\/span><\/a> led an i<\/span>nitiative<\/span> d<\/span>riven by<\/span> the need of <\/span>Hyperscaler<\/span>s<\/span> to <\/span>achieve<\/span> 4<\/span>00<\/span>G<\/span>bE<\/span> DCI<\/span>s<\/span> (Data<\/span> Center Interconnect<\/span>s<\/span>) <\/span>on<\/span> DWDM<\/span> amplified <\/span>links up to <\/span>120km<\/span> using smaller form factors such as QSFP-DD and OSFP<\/span>.<\/span>\u00a0<\/span>\u00a0<\/span> Characterized by a simplified network <\/span>design <\/span>and <\/span>a new<\/span> error correcting code C-<\/span>FEC<\/span> (C<\/span>oncatenated <\/span>FEC)<\/span>, 400ZR achieved <\/span>much success in terms of<\/span> establishing<\/span> a widely adopted, interoperable standard for 400 Gbps coherent optical transport<\/span> and meeting<\/span> the growing demands of modern data center<\/span>s<\/span>.\u00a0\u00a0<\/span> T<\/span>hese two efforts <\/span>paved the way for <\/span>OpenZR<\/span>+<\/span>, <\/span>the latest standard for 400G<\/span> coherent <\/span>pluggables<\/span>.\u00a0 <\/span>OpenZR<\/span>+<\/span>, <\/span>an MSA (<\/span>M<\/span>ulti<\/span>-S<\/span>ource <\/span>A<\/span>greement)<\/span>, <\/span>merges<\/span> some of the multi-rate capabilities from Open ROADM with higher performance <\/span>o<\/span>FEC<\/span> and <\/span>new <\/span>form factor<\/span>s<\/span> such as QSFP-DD and OSFP<\/span> to build <\/span>on <\/span>the <\/span>success<\/span> and <\/span>learnings<\/span> of <\/span>the <\/span>widely adopted <\/span>400ZR s<\/span>tandard<\/span>.\u00a0\u00a0<\/span> For <\/span>additional<\/span> information about <\/span>400ZR and <\/span>OpenZR<\/span>+<\/span>, see <\/span>some<\/span> of our <\/span><\/span>blogs<\/span><\/span><\/a> and<\/span> <\/span>whitepapers<\/span><\/span><\/a>.<\/span><\/span>\u00a0<\/span><\/p>

400G <\/span>ZRx<\/span> Transceiver Solutions<\/span>: A Practical Guide<\/span><\/span>\u00a0<\/span><\/h2>

Precision OT offers several <\/span>400G coherent <\/span>product options <\/span>that adhere to<\/span> both the OIF 400ZR and <\/span>OpenZR<\/span>+ standards<\/span>.\u00a0 <\/span>Table 1 is a summary <\/span>of<\/span> our<\/span> <\/span>400G <\/span>ZRx<\/span> product <\/span>offering<\/span>s<\/span>:<\/span><\/span>\u00a0<\/span><\/p>

\"Summary<\/p>

Table 1<\/span>.\u00a0 <\/span>Summary of<\/span> Precision<\/span> OT\u2019s<\/span> 400<\/span>G <\/span>Z<\/span>R<\/span>x<\/span> Product<\/span>s<\/span><\/span>\u00a0<\/span><\/strong><\/p>

All these transceivers come in the QSFP-DD form factor and below are some of the key differences and practical considerations for these coherent pluggable transceivers:<\/span>\u00a0<\/span><\/p>

PRE-QSFP56DD-ZR<\/span><\/a> => is the baseline standard OIF 400ZR product.\u00a0 It\u2019s a tunable DWDM optic which we refer to as the <\/span>low Tx power<\/span><\/i> option.\u00a0\u00a0<\/span>\u00a0<\/span><\/p>

PRE-QSFP56DD-ZRHT<\/span><\/a> => similar to the ZR product and using the OIF 400ZR standard as a baseline but with higher TX output power to fit the needs of legacy\/brownfield applications that require TX output power around ~0dBm. Also useful for longer reach unamplified links compared to the standard ZR.<\/span>\u00a0<\/span><\/p>

PRE-QSFP56DD-ZRXT<\/span><\/a> => This product is a unique 400G transceiver for long reach point-to-point solutions.\u00a0 Not DWDM tunable but fixed at DWDM ITU ch. 37, also provides a fixed TX output power (+4dBm) higher than our other solutions. This optic offers a link budget accommodating long distances up to 120km on unamplified links.\u00a0 Considered the closest of the modules to being \u201cplug-and-play\u201d it does not require anything special regarding tunability or optical design or host compatibility. The -ZRXT is basically a big pipe of 400G up to 120km, perfect for grey links\/dark fiber applications.\u00a0 As a fixed DWDM optic there’s always the option of using this transceiver in a MUX\/DEMUX design if you happen to have the ITU channel 37 free.<\/span>\u00a0<\/span><\/p>

PRE-QSFP56DD-ZRP<\/span><\/a> => The baseline Open ZR+ product which can do 400G as well as all the breakout applications at N x 100G speeds and different modulation types as advertised by the MSA. It\u2019s a full C-band DWDM tunable with <\/span>Low<\/span><\/i> Tx output powers and different reach depending on each application and network design.<\/span>\u00a0<\/span><\/p>

PRE-QSFP56DD-ZRPHT<\/span><\/a> =>\u00a0 This product is very similar to the 400G ZRP, but has a\u00a0 <\/span>High Tx\u00a0 output power<\/span><\/i> (up to +1 dBm), to fit the needs of implementation in legacy\/brownfield Transport line systems. Also a good fit for longer reach multi-rate 100G-400G applications with unamplified links compared to the standard ZRP.<\/span>\u00a0<\/span><\/p>

What Precision OT Brings to 400G ZRx<\/span><\/b>\u00a0<\/span><\/h2>

Precision OT is a systems engineering and integration company focused on end-to-end optical networking solutions.\u00a0 We excel in network design, development and implementations customized to the needs of our customers.\u00a0 As most everyone involved in network implementation is likely aware, coherent is much more complicated than direct detect.\u00a0 Although there are standards available for the whole family of 400G ZRx products, there are intricacies and details around its implementation into routers and switches which require specialized expertise.\u00a0 Precision OT has a deep technical understanding of all network layers and takes the time to fully understand our customers\u2019 platform right down to knowing the latest SW versions needed.\u00a0 We provide comprehensive network partnership including the following:<\/span>\u00a0<\/span><\/p>