<story><title>Hetzner subsea fibre cut outage</title><url>https://status.hetzner.com/incident/de97a4ef-deb6-416e-92a7-9264d160519a</url></story><parent_chain><item><author>foepys</author><text>Why only 8? Why don&amp;#x27;t they put like 100 in there?</text></item><item><author>Denvercoder9</author><text>Neither, it&amp;#x27;s shared ownership. It&amp;#x27;s similar to if you buy a house with your partner: neither of you owns specific rooms, but you own the whole thing together. There&amp;#x27;s likely agreements about which fibers (there&amp;#x27;s 8 fiber pairs in the cable) and&amp;#x2F;or how much bandwidth everyone can use, though.</text></item><item><author>R0b0t1</author><text>So do they own a solid chunk of it somewhere, or like a really long pie-slice sliver down the whole thing?</text></item><item><author>ArchOversight</author><text>As Hetzner is a co-investor in the cable, it is partially their cable.</text></item><item><author>daneel_w</author><text>This isn&amp;#x27;t Hetzner&amp;#x27;s own cable, and it&amp;#x27;s not just &amp;quot;any&amp;quot; cable - it&amp;#x27;s an Alcatel-Lucent + Cinia + EU project, with 150 terabits worth of bandwidth. It&amp;#x27;s a high profile target, but it&amp;#x27;s just as likely that it&amp;#x27;s just an anchor accident.</text></item></parent_chain><comment><author>bogomipz</author><text>Well, cost for one. If that fiber isn&amp;#x27;t being used it&amp;#x27;s a terrible investment. But more generally it&amp;#x27;s probably not needed. The bandwidth of optical fibre is theoretically unlimited. A single fibre carries many wavelengths, a wave length is like a channel. This is known as DWDM(dense wave division multiplexing.) A single wavelength commonly caries 100 Gbs. Although recently advances have shown 700 Gbs for a single wavelength[1]. The number of wavelengths and hence bandwidth depends on the transmission gear used on both ends of the cable. You can upgrade the bandwidth by upgrading the transmission gear. The state of the art for years has been 8 pair systems but more recently developments have produced 24 and 36 pair systems.&lt;p&gt;[1] &lt;a href=&quot;https:&amp;#x2F;&amp;#x2F;www.lightwaveonline.com&amp;#x2F;network-design&amp;#x2F;high-speed-networks&amp;#x2F;article&amp;#x2F;14195486&amp;#x2F;infinera-facebook-achieve-700gbps-per-wavelength-transmission-on-marea-submarine-cable&quot; rel=&quot;nofollow&quot;&gt;https:&amp;#x2F;&amp;#x2F;www.lightwaveonline.com&amp;#x2F;network-design&amp;#x2F;high-speed-ne...&lt;/a&gt;</text></comment>
<story><title>Hetzner subsea fibre cut outage</title><url>https://status.hetzner.com/incident/de97a4ef-deb6-416e-92a7-9264d160519a</url></story><parent_chain><item><author>foepys</author><text>Why only 8? Why don&amp;#x27;t they put like 100 in there?</text></item><item><author>Denvercoder9</author><text>Neither, it&amp;#x27;s shared ownership. It&amp;#x27;s similar to if you buy a house with your partner: neither of you owns specific rooms, but you own the whole thing together. There&amp;#x27;s likely agreements about which fibers (there&amp;#x27;s 8 fiber pairs in the cable) and&amp;#x2F;or how much bandwidth everyone can use, though.</text></item><item><author>R0b0t1</author><text>So do they own a solid chunk of it somewhere, or like a really long pie-slice sliver down the whole thing?</text></item><item><author>ArchOversight</author><text>As Hetzner is a co-investor in the cable, it is partially their cable.</text></item><item><author>daneel_w</author><text>This isn&amp;#x27;t Hetzner&amp;#x27;s own cable, and it&amp;#x27;s not just &amp;quot;any&amp;quot; cable - it&amp;#x27;s an Alcatel-Lucent + Cinia + EU project, with 150 terabits worth of bandwidth. It&amp;#x27;s a high profile target, but it&amp;#x27;s just as likely that it&amp;#x27;s just an anchor accident.</text></item></parent_chain><comment><author>tiernano</author><text>IIRC, it&amp;#x27;s mostly to do with power... every Xkm (100?) they need to put a power amp and have to splice 100 pairs at each point...</text></comment>