AXIS T8516 16-Port PoE+ Managed Gigabit Network Switch for CCTV Surveillance Systems (240W Power Budget)
Unless selecting a vari-focal camera (with an adjustable lens) It is important to select the correct camera lens option for where the camera is to be positioned. A smaller lens will give you a wider angle but will be "zoomed out more", while a bigger lens will narrow the angle down and "zoom in more". See below to give you some idea on angles of Megapixel HD Cameras:
| Lens in mm | Approx Viewing Angle (degrees) | Ideal Distance (metres) | Typical usage/notes |
|---|---|---|---|
| 2.8 | 106 | <6 | For seeing as much of the immediate area as possible such as above a doorway/low down/garage soffits (edges can appear slightly warped/distorted) - clearly "zoomed out" |
| 3.6/4 | 83-90 | <12 | A great general purpose option giving great coverage still in the corner of a room or higher up on second floor soffits with less distortion - more of a natural "zoom" |
| 6 | 56 | 6-20 | Narrows down the angle and zooms in to look past the immediate area a little to gain more detail - down a driveway for example from higher up |
| 12 | 24 | 20+ | Zooms in significantly more to look at a gate, entrance or adjascent building |
| 16 | 19 | 24+ | As above but more so |
The amount of hard drive space you require is dictated by how many cameras, as well as their resolution and frame rate settings. Finally you can often make your storage space last a lot longer by enabling motion detected recording rather than continuous, especially if there are long periods of no activity.
|
Resolution (Megapixels) |
Days of storage provided by 1TB per camera (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (continuous - full 25 frames per second) |
Days of storage provided by 1TB per 4 cameras (50% motion- 15 frames per second) |
|---|---|---|---|
| 1 | 44 | 11 | 36 |
| 2 | 22 | 5 | 18 |
| 3 | 17 | 4 | 14 |
| 4 | 11 | 3 | 9 |
| 5 | 9 | 2 | 8 |
| 6 | 8 | 2 | 6 |
| 8 (4K) | 5 | 1 | 4 |
| 12 | 4 | 0.5 | 3 |
As a rule of thumb we recommend a minimum of 2 Terabytes per 4 x 2-4MP HD cameras, as this should give you 2 weeks to a month with a few adjustments on motion detected recording. You may only require the full 25 frames per second on certain cameras if things are fast moving.
(All of our hard drives come fitted and are CCTV specific from one of the major brands)
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AXIS T8516 16-Port PoE+ Managed Gigabit Network Switch for CCTV Surveillance Systems (240W Power Budget)
The AXIS T8516 PoE+ Network Switch is a professional 16-port managed Gigabit switch designed specifically for surveillance and enterprise networking. It provides both data and power over Ethernet (PoE+) to IP cameras, access points, and other network devices, making it ideal for CCTV installations. With a total power budget of 240W, each port supports up to 30W PoE output, ensuring stable operation for multiple cameras.
The switch includes advanced management features such as VLAN, QoS, DHCP server, and a web-based graphical interface for easy monitoring and configuration. It is optimised for Axis surveillance systems and integrates seamlessly with Axis recorders and IP cameras.
Key Features:
16 Gigabit Ethernet ports
PoE+ support (up to 30W per port)
Total PoE power budget: 240W
Managed switch with web-based GUI
Optimized for CCTV surveillance systems
VLAN, QoS, STP, and advanced security features
Built-in DHCP server for easy IP assignment
2 combo RJ45/SFP uplink ports
Supports Axis Camera Station integration
Industrial-grade reliability for 24/7 operation
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