The Extrion Knowledge Center
Practical, plain-English guides, step-by-step fixes and honest comparisons for CCTV, networks, websites, software, smart buildings and safety systems, written by engineers who install and support them in Zanzibar and across Tanzania.
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CCTV, Surveillance & Physical Security
8 min
Comparison
Ask two installers for a CCTV quotation and one may offer IP cameras while the other offers cheaper "HD" analogue cameras. Both can record a clear pic...
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Web Hosting, Domains & Website Management
8 min
Comparison
Business software, shared files and email can run on a server in your own building or in the cloud, on a provider's servers reached over the internet....
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Networking, Wi-Fi & Fibre Optics
12 min
Comparison
Fibre optic cable carries data as light through glass, while Ethernet cable carries it as electrical signals through copper. This guide compares the t...
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Networking, Wi-Fi & Fibre Optics
10 min
Comparison
Mesh kits link their units to each other over the air; managed access points each have their own cable back to a switch. That difference, wireless or...
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Fire Detection & Nurse Call Systems
12 min
Comparison
Every fire alarm uses detectors, call points, sounders and a panel. The difference is what the panel knows: a conventional system shows which zone is...
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Web Hosting, Domains & Website Management
10 min
Comparison
Shared hosting, a VPS and cloud hosting differ in how much of a server is yours, how much power you can count on and who looks after it. Most small bu...
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Software Development & Business Systems
10 min
Comparison
When spreadsheets, paper forms and WhatsApp groups stop coping, the first decision is whether to buy ready-made software or have a system built around...
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Smart Homes, Smart Offices & Automation
12 min
Comparison
Smart lighting, blinds, air-conditioning and sensors talk either over dedicated control cables (wired) or by radio (wireless). That one choice decides...
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CCTV, Surveillance & Physical Security
9 min
Comparison
Bullet, dome or turret? The shape of a CCTV camera affects where it can go, how easy it is to aim, how it behaves at night, how often it needs cleanin...
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