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<p class="MsoNormal"><span style="mso-fareast-language:EN-US">We’ve had DCP-M boxes in service for a few years now on our +40km links, with their PAM4 100Gb optics. It’s been SO easy.<br>
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If I had the money, we’d throw DCP-M boxes at every link we have.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US">-Kevin Menzel<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-US"><o:p> </o:p></span></p>
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<p class="MsoNormal"><b><span lang="EN-US">From:</span></b><span lang="EN-US"> NANOG <nanog-bounces+kevin.menzel=sheridancollege.ca@nanog.org>
<b>On Behalf Of </b>Joe Freeman<br>
<b>Sent:</b> September 24, 2021 17:07<br>
<b>To:</b> Randy Carpenter <rcarpen@network1.net><br>
<b>Cc:</b> nanog <nanog@nanog.org><br>
<b>Subject:</b> Re: 100GbE beyond 40km<o:p></o:p></span></p>
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<p class="MsoNormal" style="background:yellow"><span style="font-size:10.0pt;font-family:"Arial",sans-serif;color:black">This message was sent from outside of Sheridan College. Please be careful when opening attachments, clicking links, or responding to requests
for information.</span><span style="font-size:10.0pt;font-family:"Arial",sans-serif"><o:p></o:p></span></p>
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<p class="MsoNormal">Open Line Systems can get you to 80K with a 100G DWDM Optic (PAM4) -
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<p class="MsoNormal">I've used a lot of SmartOptics DCP-M40 shelves for this purpose. They also have transponders that allow you to go from a QSFP28 to CFP to do coherent 100G out to 120Km using the DCP-M40, without a need for regen or extra amps in line.<o:p></o:p></p>
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<p class="MsoNormal">The DCP-M40 is a 1RU box. It looks like a deep 40ch DWDM filter but includes a VAO, EDFA amp, and a WSS I think. <o:p></o:p></p>
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<p class="MsoNormal">On Fri, Sep 24, 2021 at 4:40 PM Randy Carpenter <<a href="mailto:rcarpen@network1.net">rcarpen@network1.net</a>> wrote:<o:p></o:p></p>
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How is everyone accomplishing 100GbE at farther than 40km distances?<br>
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Juniper is saying it can't be done with anything they offer, except for a single CFP-based line card that is EOL.<br>
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There are QSFP "ZR" modules from third parties, but I am hesitant to try those without there being an equivalent official part.<br>
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The application is an ISP upgrading from Nx10G, where one of their fiber paths is ~35km and the other is ~60km.<br>
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thanks,<br>
-Randy<o:p></o:p></p>
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