{"id":29849,"date":"2025-01-06T15:47:33","date_gmt":"2025-01-06T20:47:33","guid":{"rendered":"https:\/\/www.precisionot.com\/?p=29849"},"modified":"2026-01-12T15:24:27","modified_gmt":"2026-01-12T20:24:27","slug":"redes-de-borde-de-acceso-qsfp28-100zr-coherentes","status":"publish","type":"post","link":"https:\/\/www.precisionot.com\/es\/access-edge-networks-qsfp28-100zr-coherent\/","title":{"rendered":"Revolucionando las redes de acceso y de borde con los transceptores DWDM sintonizables coherentes QSFP28 100ZR"},"content":{"rendered":"\t\t
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As bandwidth demands continue to surge across telecommunications and broadband networks, operators are increasingly <\/span>seeking<\/span> cost-effective, high-performance solutions that can meet both current and future needs. The <\/span>availability<\/span> of <\/span>100ZR coherent tunable DWDM<\/span> (Dense Wavelength Division<\/span> Multiplexing) <\/span>transceivers<\/span> in a QSFP28<\/span> form factor<\/span> marks a significant milestone in this quest, offering a powerful<\/span>, pluggable<\/span> solution for access, edge, and metro networks.\u00a0<\/span><\/span><\/p>

What Makes the QSFP28 100ZR Unique?<\/span><\/span><\/h2>

The <\/span>QSFP28 100ZR Coherent Tunable DWDM Transceiver<\/span> (TQSFP28-ZR) <\/span>is <\/span>a game-changer<\/span> for network operators who need to maximize <\/span>capacity<\/span> without incurring the <\/span>high costs<\/span> traditionally associated with long-distance DWDM solutions. <\/span>Table 1 below shows a comparison of the various solutions available to provide 100G service beyond <\/span>10<\/span>km<\/span>.<\/span><\/span><\/p>

\"Comparison<\/p>

Table 1 <\/span>Comparison of <\/span>100G Solutions Beyond <\/span>10km<\/span><\/span><\/em><\/p>

Traditional transport systems<\/strong> come with high overall cost and power consumption. Plus, you need specialists to do the install–usually the network equipment manufacturer\u2014and the installation time is quite long.\u00a0\u00a0 <\/span>\u00a0<\/span><\/p>

In the case of the <\/span>CFP2-DCO (Digital Coherent Optics)<\/strong>, the port density per 1RU (typically 4-8 ports per RU) is way lower compared to QSFP form factors which can typically host 30-36 interfaces per RU.\u00a0<\/span>\u00a0<\/span><\/p>

The\u00a0QSFP28 PAM4 fixed DWDM\u00a0<\/b>transceiver is probably the closest option to the QSFP28 100ZR since it has the QSFP28 form factor.\u00a0 However, this solution is only for fixed DWDM channels and network engineers would still need to install some sort of external amplification and dispersion compensation modules to reach more than 1-2km.\u00a0<\/p>

Traditional <\/span>100G ER4\/ZR4\/EZR4 Gray and 100G BiDi<\/strong> optics offer lower cost\/power\/complexity but are non-DWDM solutions.\u00a0\u00a0\u00a0<\/span>\u00a0<\/span><\/p>

Finally, <\/span>400G coherent ZRx<\/strong> modules can be downrated to be used 1x100G applications which might not be ideal as it is using only 25% of the host port capacity. Most importantly, QSFP-DD\/OSFP transceivers require newer host switches\/routers to support this new technology, meaning a lot of investment upfront in all new equipment.\u00a0\u00a0<\/span>\u00a0<\/span><\/p>

The QSFP28 form factor has been, by far, the most deployed form factor over the last decade for 100G transmission.\u00a0 <\/span><\/p>

\u201cThe closer you get to the Access network \u2013 the more cost effective you need to be\u201d commented Precision OT Principal Solutions Engineer Pol Torres. \u201cAny time you can reuse installed equipment like existing switches\/routers with QSFP28 interfaces and be able to repurpose them to upgrade data connections, it\u2019s a win.\u201d\u00a0<\/span><\/p><\/blockquote>

Unlike the 400G ZRx coherent pluggable QSFP-DD (or OSFP) which has had a more gradual integration into the market due to the extra initial investment involved, the <\/span>TQSFP28 100ZR <\/span><\/b>can reuse existing equipment and ports (provided they can accommodate the higher power requirements and additional heat dissipation), bypassing the need to invest in new equipment or SW licenses.<\/span>\u00a0<\/span><\/p>

T<\/span>QSFP28<\/span> 100ZR Tunable DWDM Transceiver <\/span>Overview<\/span><\/span><\/h2>

The 100ZR <\/span>product line of 100G transceivers <\/span>are capable of reaching<\/span> 80 km<\/span> on DWDM unamplified links or up to <\/span>300km<\/span> on DWDM amplified links. <\/span>The standards below have been applied to larger form factors such as CFP2<\/span> and QSFP-<\/span>DD<\/span>. The new, groundbreaking 100ZR technology also falls within these\u00a0established\u00a0standards, filling a gap in the industry\u00a0which has long awaited a tunable, QSFP28 100G DWDM\u00a0edge solution\u00a0that\u00a0does not require expensive transport equipment or\u00a0new\u00a0higher cost switches and routers.<\/span><\/span><\/p>

100ZR Standards:<\/span><\/b>\u00a0<\/span><\/h3>