Ruijie NIS‑GE‑SFP‑550M‑MM850 — 1Gb multimode SFP optical transceiver
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, frame rate settings, and whether you have H.265 encoding enabled or not to save space (We advise turning it on to double the capacity shown below with ease).
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 (to perhaps double or more these figures again).
|
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 2 Terabytes for a 4 x 4/5MP HD camera setup, as this should give you approx 2 weeks using H.265 @ 20fps and that is on continuous, not motion-detected recording.
(You may only require the full 25 frames per second on certain cameras if things are fast-moving - ie above a till)
You can also use the Hikvision online calculator to work out what works best for you specifically: https://tools.hikvision.com/ca...
(All of our hard drives come fitted and are CCTV-specific from one of the major brands)
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Ruijie NIS‑GE‑SFP‑550M‑MM850 — 1Gb multimode SFP optical transceiver.
- 1000BASE‑SX SFP for multimode fibre (MMF) using an 850 nm VCSEL transmitter; duplex LC connector.
- Reach up to 550 m over multimode fibre (dependent on OM grade and link conditions).
- Hot‑pluggable SFP form factor; SFP‑MSA compliant with Digital Diagnostic Monitoring (DDM/DOM).
- Low power consumption (≤ 1.5 W); transmitter (VCSEL) and PIN receiver; BER 1.0E‑12.
- Standards & safety: IEEE 802.3/1000BASE‑SR, SFF‑8472, SFF‑8431, SFF‑8432, RoHS; Class 1 laser safety.
Why choose this module?
- Branded Ruijie module offering vendor support and broad SFP interoperability for campus, datacentre and enterprise multimode links.
- DDM provides live optics diagnostics (optical power, temperature, alarm reporting) for easier fault finding and monitoring.
- Compact, hot‑swappable SFP makes upgrades and line card changes simple with minimal downtime.
Use cases: short‑reach multimode uplinks within buildings, wiring closets, access switches and server-room links where 1Gb Ethernet on MMF is required.
Installation & safety: Install only by qualified personnel. Observe ESD precautions and follow Ruijie datasheet/installation guide. Verify compatibility with your switch vendor (some vendors lock optics by vendor ID). Confirm operating temperature requirements for harsh/industrial environments prior to deployment.
Compliance note: Module meets RoHS and Class 1 laser safety; check supplier documentation for CE/UKCA markings if required for your market.
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