The Extrion Knowledge Center
CCTV, intercoms, access control, alarms and safe remote viewing.
CCTV, Surveillance & Physical Security
15 min
Zanzibar resource
Most CCTV disappointments are decided before the first camera goes up: cameras in the wrong places, grey night footage, a recorder that keeps four day...
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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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CCTV, Surveillance & Physical Security
12 min
Keys get copied, lost and never returned, and a notebook cannot tell you who opened the store room at night. This guide explains the choices in electr...
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CCTV, Surveillance & Physical Security
30 min
A factory reset returns an IP camera to the state it left the factory in: no password, default network settings and no link to your recorder. This gui...
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CCTV, Surveillance & Physical Security
45 min
Locked out of your Hikvision or Dahua NVR, or setting one up again? This guide explains the manufacturer-supported ways to recover the password, the d...
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CCTV, Surveillance & Physical Security
40 min
Lost the password to your CCTV DVR, or need to reset it? This guide covers analogue and hybrid recorders (Hikvision Turbo HD, Dahua XVR and similar):...
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CCTV, Surveillance & Physical Security
30 min
Troubleshooting fix
A camera tile that says "No video", "Offline" or simply stays black is almost always caused by power, the cable, the network address, the password or...
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CCTV, Surveillance & Physical Security
30 min
Troubleshooting fix
A Hikvision camera that shows offline on the recorder has a power, cable, address or password problem, while a system that is offline only in Hik-Conn...
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CCTV, Surveillance & Physical Security
30 min
Troubleshooting fix
Live view works, but playback is empty or the recorder says no record file found. The cause is usually the hard drive, the recording schedule, the ove...
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CCTV, Surveillance & Physical Security
45 min
Troubleshooting fix
When an IP intercom stops working, the fault is usually power, the network, the link between door station and monitor, SIP registration, the app accou...
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CCTV, Surveillance & Physical Security
12 min
Zanzibar resource
Most shop and office security in Zanzibar is bought in a hurry after a break-in. This guide shows how cameras, alarms, access control, the till networ...
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CCTV, Surveillance & Physical Security
10 min
A CCTV system is cameras, cables, a recorder and a way to watch. This guide explains each part in plain words: the camera shapes, IP versus analogue H...
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CCTV, Surveillance & Physical Security
9 min
How many days a CCTV recorder keeps depends on one number most people never check: the cameras' bitrate. This guide gives a simple formula you can wor...
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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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CCTV, Surveillance & Physical Security
20 min
You can watch your CCTV from your phone using the official app from your recorder's manufacturer or a VPN, without opening your recorder to the intern...
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