# equipment Published articles for equipment. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## What N, N+1, 2N, and 2(N+1) Mean in a Data Center DevFeed: [What N, N+1, 2N, and 2(N+1) Mean in a Data Center]() Original publisher: [Read original article]() Author: j2sw Published: 2026-08-27T13:59:08Z Content type: tutorial Language: en Sources: [Justin Wilson (j2sw)]() Topics: [datacenter](), [data]() Tags: [2n-redundancy](), [capacity](), [colocation](), [components](), [cooling](), [data-center](), [data-center-power](), [equipment](), [internet-architecture](), [maintenance](), [n-plus-1-redundancy](), [network-operations](), [power-distribution](), [system](), [ups]() ### AI overview This article explains what data center redundancy ratings N, N+1, N+2, 2N, and 2(N+1) indicate about component capacity, failures, maintenance, cooling, and alternate paths. ### Source excerpt Have you ever looked at a data center marketing slick and wondered what N, N+1, 2N, and 2(N+1) actually mean? The main thing they tell you is how many components can fail before the system drops below the capacity needed to support the load. When I evaluate a data center, I want to know what ... Read more The post What N, N+1, 2N, and 2(N+1) Mean in a Data Center appeared first on Justin Wilson (j2sw). ## Alta Labs AP7 Pro: Quick Look and First Impressions DevFeed: [Alta Labs AP7 Pro: Quick Look and First Impressions]() Original publisher: [Read original article]() Author: j2sw Published: 2026-08-14T16:57:37Z Content type: article Language: en Sources: [Justin Wilson (j2sw)]() Topics: [Quick Look](), [Hardware](), [Wi-Fi]() Tags: [access-point](), [alta-labs](), [ap7-pro](), [equipment](), [hardware](), [look](), [network-engineering-resources](), [networking](), [wi-fi](), [wifi](), [wireless]() ### AI overview A video provides a quick look at the Alta Labs AP7 Pro access point, showing its hardware and offering initial impressions. It is not a full review or performance test; follow-up testing is planned after installation and real traffic use. ### Source excerpt I am getting back to recording some videos, and this time I am taking a quick look at the Alta Labs AP7 Pro. This is not meant to be a full review or performance test. I wanted to get the AP7 Pro on camera, show the hardware, and give everyone a closer look at the ... Read more The post Alta Labs AP7 Pro: Quick Look and First Impressions appeared first on Justin Wilson (j2sw). ## Multi-Signal GNSS & the Curious Case of Galileo E24: Part 1 DevFeed: [Multi-Signal GNSS & the Curious Case of Galileo E24: Part 1]() Original publisher: [Read original article]() Published: 2020-07-18T07:07:23Z Content type: article Language: en Sources: [Bert Hubert's writings]() Topics: [systems]() Tags: [engineering](), [equipment](), [gnss](), [phones](), [signal](), [standard]() ### AI overview This article investigates why Galileo satellite E24 was reported as being 1.5 meters off while phones and other positioning equipment showed no problems. It introduces multi-frequency GNSS and explains how ionospheric delays affect satellite-distance measurements. ### Source excerpt GPS, GLONASS, Galileo, BeiDou (Global Navigational Satellite Systems, GNSS) are miracles of engineering. And within any complex system hide surprises and unsuspected complications. In this post I go over how we resolved an odd observation: that everyone (including major institutions) reported that one of the Galileo satellites (E24) appeared to be off by 1.5 meters, while actual positioning equipment (like phones) showed no problems at all. Through the explanation, we'll casually learn a thing or two about the cool concept of multi-frequency GNSS. ## Some brief notes on making ethernet cables DevFeed: [Some brief notes on making ethernet cables]() Original publisher: [Read original article]() Published: 2017-09-30T18:07:40Z Content type: tutorial Language: en Sources: [Bert Hubert's writings]() Topics: [Ethernet](), [Tool]() Tags: [cat6](), [connectors](), [equipment](), [ethernet](), [guide](), [making]() ### AI overview A practical guide to making and routing Ethernet cables. It cautions that crimping is difficult, recommends buying ready-made cables when possible, and discusses suitable tools, connectors, cable types, and pulling cable through conduits. ### Source excerpt Some brief notes on making ethernet cables With thanks to the most excellent NLNOG for a lot of mostly correct advice! Friends will tell you "crimping" ethernet cables is easy. Most of your friends either have overly rosy memories, or have practiced on 200 cables before telling you it is now easy. It is not easy. This page is for if you have a few extra euros/dollars/coins to spare, and don't want to spend rare hours of concentrated effort to crimp an ethernet cable using unfamiliar equipment and supplies.