{"id":6756,"date":"2025-10-25T17:00:00","date_gmt":"2025-10-25T16:00:00","guid":{"rendered":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?p=6756"},"modified":"2025-10-25T16:28:48","modified_gmt":"2025-10-25T15:28:48","slug":"fibre-connection-between-the-house-and-the-outbuildings","status":"publish","type":"post","link":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?p=6756","title":{"rendered":"Fibre Connection Between the House and the Outbuildings"},"content":{"rendered":"\n<p>After initially thinking I wanted a fibre optic network link, I&#8217;d mostly settled on using a copper Cat 5E Ethernet link between the House and the Outbuildings, to connect their separate computer networks together. The reasons for favouring a copper Ethernet link were:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>I happen to have about 150m of Ubiquiti outdoor grade Cat 5E Ethernet cable going spare, from when I bought a 305m reel to install outdoor cabling for the CCTV cameras that monitored the site and the construction of the House 10 years ago &#8211; so this enables the buildings to be linked &#8216;for free&#8217;<\/li>\n\n\n\n<li>This network link will directly-connect the network Routers<sup data-fn=\"208d7d55-729b-4b8f-ac81-c25efb32846d\" class=\"fn\"><a href=\"#208d7d55-729b-4b8f-ac81-c25efb32846d\" id=\"208d7d55-729b-4b8f-ac81-c25efb32846d-link\">1<\/a><\/sup> in each building, which (currently) only offer 1Gbit\/s copper Ethernet ports and so would need Media Converters to connect over a fibre link\n<ul class=\"wp-block-list\">\n<li>When these Routers need to be replaced, I would expect to purchase devices which have <a href=\"https:\/\/en.wikipedia.org\/wiki\/Small_Form-factor_Pluggable#10_Gbit\/s_SFP+\" target=\"_blank\" rel=\"noreferrer noopener\">SFP+<\/a> ports which would take an SPF+ module to enable a fibre cable to be connected directly to each Router and synchronise at 10Gbit\/s<\/li>\n\n\n\n<li>Media Converters aren&#8217;t especially expensive &#8211; roughly \u00a325 each &#8211; but need mounting somewhere and need their own power supply<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>The physical cable route between the two Routers takes &#8216;the long way round&#8217; but is less than 100m, so the Cat 5E cable should enable a 1000BASE-T connection, at 1Gbit\/s<\/li>\n\n\n\n<li>1Gbit\/s will be plenty of bandwidth, given the planned use of the Outbuildings<\/li>\n<\/ul>\n\n\n\n<p>However, I have just installed 85m of outdoor grade 8-core bulk fibre cable, because:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>I had to install another cable along the same route, to extend a Current Transformer clamp connection to enable the Tesla PowerWall 3<sup data-fn=\"f3850163-e475-4fe8-9346-9b0c659b0664\" class=\"fn\"><a href=\"#f3850163-e475-4fe8-9346-9b0c659b0664\" id=\"f3850163-e475-4fe8-9346-9b0c659b0664-link\">2<\/a><\/sup> to monitor the existing AC-connected solar PV inverter&#8217;s generation output\n<ul class=\"wp-block-list\">\n<li>About 1\/3 of the cable run is through the now-fully-insulated loft space above the Workshop, so it&#8217;s quite a difficult job to balance on the roof trusses (while unable to stand upright) and attach the cable to the cable baskets using the existing releasable cable ties &#8211; and it&#8217;s no harder to do that for 2 cables than for 1<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Unterminated bulk fibre cable is surprisingly cheap &#8211; less than 50p per metre &#8211; so it&#8217;s not a major problem if the fibre doesn&#8217;t get used for a while &#8211; or ever<\/li>\n<\/ul>\n\n\n\n<p>I&#8217;m still planning to use the copper Cat 5E initially, so I won&#8217;t pay to have the fibre spliced to pre-terminated &#8216;pigtails&#8217; until I see how that performs (or doesn&#8217;t). If the Cat 5E works OK I&#8217;ll wait until I upgrade the Routers to light up the fibre link.<\/p>\n\n\n\n<p>I selected Single Mode (OS2) fibre, with an outdoor-grade PE sheath (since about 25m of the run is in an underground duct between the buildings) and 8-core because it was only fractionally more expensive than 4-core.<\/p>\n\n\n\n<p>Initially I found the many variants of fibre types and connectors quite confusing but <a href=\"https:\/\/stargazerslounge.com\/topic\/405633-fibre-optic-networking-for-observatories-a-practical-guide\/\" target=\"_blank\" rel=\"noreferrer noopener\">this forum post<\/a> by an amateur astronomer, in relation to network-connecting an observatory. proved very helpful in cutting through the jargon and homing in on the right solution &#8211; although they advocate using pre-terminated fibre which can be difficult to install when there&#8217;s not much space available in an existing duct.<\/p>\n\n\n<ol class=\"wp-block-footnotes\"><li id=\"208d7d55-729b-4b8f-ac81-c25efb32846d\">I&#8217;m using the term &#8220;Router&#8221; in the strict sense of its computer networking definition: a device that provides OSI Layer 3 connectivity, routing TCP\/IP packets between Layer 2 network segments  <a href=\"#208d7d55-729b-4b8f-ac81-c25efb32846d-link\" aria-label=\"Jump to footnote reference 1\">\u21a9\ufe0e<\/a><\/li><li id=\"f3850163-e475-4fe8-9346-9b0c659b0664\">Strictly speaking it&#8217;s the Tesla Backup Gateway 2 which does the monitoring &#8211; and then passes the measurement to the PowerWall 3 <a href=\"#f3850163-e475-4fe8-9346-9b0c659b0664-link\" aria-label=\"Jump to footnote reference 2\">\u21a9\ufe0e<\/a><\/li><\/ol>","protected":false},"excerpt":{"rendered":"<p>After initially thinking I wanted a fibre optic network link, I&#8217;d mostly settled on using a copper Cat 5E Ethernet link between the House and the Outbuildings, to connect their separate computer networks together. The reasons for favouring a copper &hellip; <a href=\"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/?p=6756\">Continue reading <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":"[{\"content\":\"I'm using the term \\\"Router\\\" in the strict sense of its computer networking definition: a device that provides OSI Layer 3 connectivity, routing TCP\/IP packets between Layer 2 network segments \",\"id\":\"208d7d55-729b-4b8f-ac81-c25efb32846d\"},{\"content\":\"Strictly speaking it's the Tesla Backup Gateway 2 which does the monitoring - and then passes the measurement to the PowerWall 3\",\"id\":\"f3850163-e475-4fe8-9346-9b0c659b0664\"}]"},"categories":[23,102,94],"tags":[],"class_list":["post-6756","post","type-post","status-publish","format-standard","hentry","category-build-progress","category-computer-networking","category-outbuildings"],"_links":{"self":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6756","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=6756"}],"version-history":[{"count":2,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6756\/revisions"}],"predecessor-version":[{"id":6758,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=\/wp\/v2\/posts\/6756\/revisions\/6758"}],"wp:attachment":[{"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=6756"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=6756"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.marshflattsfarm.org.uk\/wordpress\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=6756"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}