Written to be usable before you buy anything
Each guide answers one question and answers it directly at the top. The detail underneath exists to let you check the reasoning and apply it to your own building, not to pad the page toward a word count.
Where a guide's honest answer is that the cheaper option is fine, it says so. Cat6 is sufficient for most device locations. Most homes do not need six access points. A 9U cabinet is plenty for a lot of small offices. Those are useful conclusions, and a guide that cannot reach them is a sales page.
What the guides cover
The set covers the decisions that come up repeatedly in planning conversations, in the order they usually come up.
- Specification decisions: Cat6 versus Cat6A, rack sizing, patch-panel planning
- Coverage decisions: how many access points, extenders versus wired access points, why calls drop
- Camera decisions: PoE system planning, camera cost factors
- Project decisions: commercial installation checklist, network closet planning, prewiring a new home
- Environment-specific: restaurant network and camera planning
- Ecosystem: UniFi compared with consumer networking
How to use them
If you are specifying a system, the specification guides come first — they determine what gets pulled and where. If you are diagnosing a complaint, the coverage guides are the faster route. If you are building or renovating, the prewiring and checklist guides matter most, because the decisions with the shortest window are the ones made before the walls close.
What these guides are not
They are general planning guidance based on published standards and equipment specifications. They are not a substitute for looking at a specific building, and they do not contain prices. Where a decision depends on measurement — cable distance, signal level, PoE budget — the guide says so rather than offering a number that sounds authoritative and might be wrong for your site.
Planning guides
Task-oriented guides that answer one planning decision at a time — sizing, specifying, and prewiring for real installs.
6U, 9U, 12U or 18U: what actually fits in eachThis compares the common wall cabinet sizes directly. For the method of working out your requirement from scratch, the rack sizing guide covers that.Cat6 versus Cat6A: how to decide, run by runBoth carry gigabit without difficulty. The decision only matters where 10 gigabit is involved, and it is best made per run rather than per building.Commercial network installation: a planning checklistMost commercial network problems are decided before installation begins. This is the list of things worth settling first.Common Network Port Numbers: A Field Reference for TechsA working reference to the TCP and UDP ports low-voltage and IT technicians actually encounter, from web and remote access to IP cameras, DVRs, and VoIP.DNS Records Explained: A, AAAA, CNAME, MX, TXT, NS and SOAWhat each common DNS record type does, when you use it, and how to read the result of a DNS lookup.How Long DNS Propagation Actually Takes (and Why)How TTL, independent caching, and parent-zone nameserver delegation determine DNS change timing — and how to sequence a change to minimize downtime.How many Wi-Fi access points does a property actually need?Access-point count is an output of the design, not an input. Two buildings of identical size can need very different numbers, and the reasons are specific.How Much Internet Speed Does a Business Really Need?How to size a business internet plan by concurrent activity — the real download and upload demand of video calls, VoIP, cloud cameras, streaming and backups — and why upload, not download, is usually the limiting number.How to plan a network closet that stays usableThe closet matters more than the cabinet inside it. Four decisions — where, power, heat, and clearance — determine whether it works for a decade.How to Test Your Internet Speed Accurately (and Why Two Tests Disagree)A technical guide to measuring internet throughput correctly, explaining why speed tests disagree and how to isolate the real bottleneck.How to work out what size network rack you needThis is the method. If you already know your device list and just want to compare the common wall-mount cabinet sizes, the size comparison guide covers that specifically.Patch-panel planning: ports, labeling, and layoutThe patch panel is where a cabling installation either becomes maintainable or becomes an archaeology project. Most of that is decided by labeling.Planning a PoE camera system from the objectives backwardsCamera systems get specified by count and judged by footage. Working backwards from what each view has to prove produces a better system with fewer cameras.Prewiring a new home for internet, Wi-Fi, and camerasPrewiring is the cheapest decision in a build and the one with the shortest window. This is what is worth running while the walls are open.Public vs Private IP Addresses, Explained for Business OwnersA plain-English but technically precise explanation of public vs private IP addresses, the RFC 1918 ranges, NAT, static vs dynamic addressing, and the real limits of IP geolocation.Restaurant network and camera planningA restaurant runs three networks whether or not anyone planned them, and the camera views that matter are a short and specific list.SPF, DKIM, and DMARC Explained: The DNS Records That Decide If Your Email Gets DeliveredA technical walkthrough of the three DNS records that authenticate business email, how they work together, how to read them, and how to deploy them without breaking delivery.Subnetting and CIDR Explained for Real NetworksA practical, mechanism-level explanation of IPv4 subnet masks and CIDR prefixes: reading /24 vs /26, host-count math, splitting a network, and a full CIDR reference table with worked examples.UniFi compared with consumer networking equipmentThe difference is management and segmentation rather than raw speed. Whether that is worth the added complexity depends entirely on what the network has to do.What actually drives the cost of a camera installationCameras are rarely the largest line on a camera quote. Cable routes, mounting access, and storage usually are.What drives the cost of Ethernet installation in HoustonCable is a small part of an installed run. Access is most of it, and in this region the building's era and foundation type are the strongest predictors.Why Wi-Fi drops calls, and how to find the actual causeCalls fail differently from downloads. A network that streams fine can still drop calls, and the reasons are specific and diagnosable.Wi-Fi extenders versus wired access pointsThe difference is not quality of hardware. It is that a relay spends its radio time twice, and a wired access point does not.
Technical reference library
Specification and standards references built from published figures — cite-worthy tables for PoE, cabling, wireless, AV, and camera work.
Access Control Wiring and Standards Reference: Wiegand vs OSDPA technical reference covering reader-to-controller protocols (legacy Wiegand vs OSDP/SIA OSDP over RS-485 with AES-128 Secure Channel), door hardware (electric strike vs maglock, fail-safe vs fail-secure, REX, door position sensor), and composite access-control cabling with real distances, voltages, AWG resistance, and voltage-drop math.Camera Lens Focal Length and Field of View ReferenceA reference-grade explanation of how camera lens focal length sets field of view, with the exact angle-of-view formula, real horizontal/vertical/diagonal FOV values for 2.8mm through 12mm lenses on common sensors, and the trade-off between coverage width and identification distance.Coaxial Cable Types Reference: RG6, RG59, and RG11A neutral, specification-grounded reference covering the three common 75-ohm coaxial cables used in CATV, satellite, CCTV, and SDI work (RG6, RG59, RG11), how they differ from 50-ohm RF coax (RG58, RG8), and the impedance, attenuation, connector, and run-length facts installers use to choose one.Conduit Fill and Raceway Sizing Reference (NEC Chapter 9)A fact-checked reference on sizing conduit and raceways under NEC Chapter 9: the 53/31/40 percent fill limits, trade-size internal areas from Table 4, how cable OD drives count, the 2.8-3.2 jam ratio, the 360-degree bend limit, pull tension and bend radius, and how EMT, PVC, and flexible conduit compare, with low-voltage practice per TIA-568 and TIA-569.Ethernet Cable Distance Limits and How to Extend Past 100 MetersA reference guide to twisted-pair Ethernet distance: the 100-meter TIA-568 channel and why it exists, distance by speed and category (including 10GBASE-T on Cat6 vs Cat6a), PoE and voltage drop, and how to run farther with switches, fiber, and copper extenders.Fiber Optic Cable Types: Single-Mode vs Multimode (OM/OS) ReferenceA specification-grounded reference on optical fiber types: the physics separating single-mode from multimode, the OS and OM grade families, IEEE 802.3 reach limits by data rate and fiber grade, connector and duplex conventions, and the decision between fiber and copper cabling.Grounding and Bonding for Low-Voltage and AV Systems: A TIA-607 ReferenceA working reference to ANSI/TIA-607 telecommunications bonding and grounding for low-voltage, network, and AV installs: the TMGB and TGB busbars, TBB backbone conductor sizing by length, single-point (star) grounding, shield termination on shielded runs, and how ground loops cause hum and interference.HDBaseT and AV-over-IP Distribution: A Technical Reference for Signal ExtensionA specifications-grounded comparison of HDBaseT, AV-over-IP (SDVoE and H.264/H.265), and long-distance HDMI, with verified distances, bandwidth math, cable categories, and selection guidance for integrators, businesses, and DIY researchers.HDMI Versions and Cable Types: A Technical ReferenceA specification-accurate reference to HDMI versions (1.4, 2.0, 2.1, 2.1a), the four HDMI Licensing cable categories and their certified bandwidths, real passive copper length limits, when to move to active or optical HDMI, and how ARC/eARC and HDCP behave across versions.IP Rating and Weatherproofing Reference: IP65, IP66, IP67, IP68 and IK Impact CodesA mechanism-level reference to the IEC 60529 IP code and IEC 62262 IK impact code, with real test conditions and rating selection for outdoor cameras, TVs, and floodlights in exposed, soffit, and ground-level mounts.Power over Ethernet (PoE) Power Standards ReferenceA mechanism-level reference to the IEEE 802.3af, 802.3at, and 802.3bt Power over Ethernet standards, covering source-versus-device wattage, voltage windows, pair usage, power classes 0-8, cable heating and derating, switch power budgeting, and which devices each type powers.Projector Throw Distance and Screen Size ReferenceA working reference for projector placement: throw ratio = distance / image width, the throw-category bands (UST, short, standard, long), 16:9 diagonal-to-width math (x0.872), and the foot-lambert brightness formula tying ANSI lumens, screen gain, and ambient light together, all with verified worked examples.RS-485 vs RS-232 Serial Control: A Technical ReferenceA specification-accurate comparison of EIA/TIA-232 (RS-232) and EIA/TIA-485 (RS-485) serial control, covering single-ended vs differential signaling, real voltage levels, node counts, distance-vs-baud tradeoffs, 120-ohm termination, and the systems each is used in.Security Camera Bitrate and Recording Storage: A Reference GuideA mechanism-level reference on security camera bitrate and recording storage: real H.264 and H.265 bitrate ranges for 2MP, 4MP, and 8MP/4K; CBR vs VBR and frame-rate effects; the exact Mbps-to-terabytes formula; and worked examples for sizing an NVR by camera count and retention days.Security Camera Resolution and Megapixel ReferenceA mechanism-level reference on security camera resolution: exact pixel counts per megapixel tier, the pixels-per-foot and IEC 62676-4 DORI density targets, the field-of-view-versus-detail tradeoff, sensor size and low-light behavior, and worked resolution recipes for a doorway, a driveway, and a parking lot.Smart Home Wireless Protocols: Zigbee, Z-Wave, Thread, and Matter ReferenceA specifications-accurate reference to the four wireless standards behind smart homes. Zigbee and Thread share the IEEE 802.15.4 radio at 2.4 GHz (16 channels, 250 kbps); Z-Wave uses sub-GHz (908.42 MHz in the US) for less congestion and roughly 100 m per hop. Matter is an interoperability layer over IPv6, not a radio, running on Thread or Wi-Fi. Covers mesh routing, hub and border-router requirements, Wi-Fi and Bluetooth roles, and how to plan around 2.4 GHz interference before hiring an installer.Speaker Wire Gauge (AWG) Reference: Run Length, Impedance, and ResistanceA technical reference for choosing speaker wire gauge by run length and speaker impedance, using published copper resistance values, the 5-percent damping rule, and NEC in-wall cable ratings.Structured Cabling Standards & T568A/T568B Pinout ReferenceA field-reference guide to ANSI/TIA-568 structured cabling: the six subsystems, the exact T568A and T568B pin-1-through-8 color order, the four-pair color scheme, why straight-through and crossover cables differ, TIA-606 labeling, and the 90-meter horizontal plus 10-meter patch 100-meter channel model.TV Size and Viewing Distance: A Reference GuideA mechanism-level reference on matching TV diagonal to seating distance using the SMPTE (~30 degrees) and THX (~40 degrees) viewing-angle standards, the underlying geometry, resolution-limited distances for 1080p versus 4K, and mounting height.UPS Sizing and Battery Runtime ReferenceA technical reference on sizing an uninterruptible power supply and estimating battery runtime. Covers the difference between VA and watts and how power factor (0.6-1.0) links them, the runtime formula (usable watt-hours divided by load watts) and why heavier loads shorten runtime disproportionately via Peukert's law, the three IEC 62040-3 topologies (VFD standby, VI line-interactive, VFI online double-conversion), a worked 200 W network-rack/NVR example, and when to add external battery modules versus pairing with a generator.Video Signal Formats and Chroma Subsampling: A ReferenceA technical reference on digital video signal formats: resolution, refresh rate, bit depth, and chroma subsampling (4:4:4, 4:2:2, 4:2:0), how they combine into uncompressed bandwidth, and how that bandwidth maps to real HDMI and HDBaseT transport limits.VLAN and Network Segmentation Reference (IEEE 802.1Q)A citation-grade reference on IEEE 802.1Q VLAN tagging and network segmentation: the 32-bit tag structure (TPID 0x8100, PCP/DEI/VID), the 12-bit VLAN ID range of 1-4094, access versus trunk ports, the native/untagged VLAN, why cameras/IoT/guest/VoIP belong on separate VLANs, and how inter-VLAN routing and IP subnets relate.Wi-Fi Standards & Generations Reference (Wi-Fi 4 through Wi-Fi 7)A specification-grade reference to the IEEE 802.11 Wi-Fi generations — 802.11n (Wi-Fi 4), 802.11ac (Wi-Fi 5), 802.11ax (Wi-Fi 6/6E), and 802.11be (Wi-Fi 7) — with real maximum PHY rates, operating bands, channel widths, modulation, and the multi-user mechanisms (MU-MIMO, OFDMA, MLO) that separate them.Wireless Site Survey and AP Placement: An RF Planning ReferenceA vendor-neutral reference for wireless site surveys and access point placement, covering the RSSI and SNR design targets, 2.4 GHz and 5 GHz channel planning, DFS, co-channel and adjacent-channel interference, cell overlap for roaming, AP density by client count and airtime, and the difference between predictive, passive, and active surveys.
Frequently asked questions
Are the guides specific to Houston?
Mostly they are general technical planning, because physics does not change by city. Where regional conditions genuinely matter — attic temperatures during summer work, slab-foundation routing, humidity and driven rain on exterior equipment — the guides say so explicitly rather than adding a city name to generic advice.
Do the guides include prices?
They include cost factors — the variables that move a quote and by roughly how much in relative terms — but not figures. Published prices require owner approval and a site-specific scope, and a number without those behind it would be misleading.
