Uniview 26-Port Managed PoE Switch with 24 PoE Ports, Dual Gigabit Uplink, 370W Power Budget & 250m Extend Mode (UV-NSW2020-24T2GC-POE-IN)
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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Uniview 26-Port Managed PoE Switch with 24 PoE Ports, Dual Gigabit Uplink, 370W Power Budget & 250m Extend Mode (UV-NSW2020-24T2GC-POE-IN)
The UV-NSW2020-24T2GC-POE-IN is a high-capacity unmanaged PoE Ethernet switch designed for large-scale IP surveillance installations. It features 24 Fast Ethernet PoE ports for powering cameras and 2 Gigabit combo uplink ports for high-speed data transfer to NVRs or core networks. Supporting IEEE 802.3af/at standards, it delivers stable power up to 30W per port with a total PoE budget of up to 370W, making it suitable for dense CCTV deployments. With Extend Mode enabled, the switch can transmit power and data up to 250 meters, ideal for warehouses, campuses, factories, and enterprise surveillance systems.
Key Features
- 24 × 10/100 Mbps PoE ports
- 2 × Gigabit combo uplink ports
- IEEE 802.3af / 802.3at PoE support
- Total PoE power budget up to 370W
- Up to 30W per PoE port
- 250m long-distance transmission (Extend Mode)
- VLAN / Secure mode for port isolation
- Default mode for full port communication
- Intelligent traffic buffer optimization
- Fan cooling system for stable operation
- All-metal durable housing
- Plug-and-play unmanaged operation
- Designed for 24/7 CCTV surveillance systems
- Ideal for large IP camera networks and NVR systems
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