Akuvox - R20A-2 2 Wire Compact IP Door Intercom Unit with 1 Call Button (Video & RFID Card reader) incl. Surface Mount Plate
- CCTV Lens Guide
- Hard Drive Size Guide
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)
The Akuvox R20A-2 2-wire IP door intercom is ideal for premises with old wiring in the walls. The R20A-2 allows you to get the benefits of IP network- type system, whilst using the old wiring with no need to replace the whole system.
The R20A-2 SIP Intercom is a highly-compact, single call button, IP-connected Door Intercom, featuring high resolution colour camera and RFID card reader for swift , secure remote audio/video communication and door entry.
Using the latest IP connectivity technology, Akuvox R20A-2 enables visual monitoring and one-to-one voice communication between residents & visitors and secure remote access; ideal for multi-dwelling units (MDUs), apartments, entrance gates and unmanned office receptions.
The built-in RFID reader allows for contactless, secure access using RFID cards or keyfobs. This model is supplied complete with surface-mount backbox. IP65 protection rating allows for internal and external location.
- Vandal resistant body, with a flush butto
- Two-pin wire for power supply and network acc
- Wide-angle camera: 110º (H), 58º (V)
- IC/ID Card Reader embedde
- Two-way audio communication over IP networks with Echo Cancel & Noise suppressio
- H.264 video compression
Description R20A-2
- Camera 2M pixels, automatic lighting
- Button 1 call button
- Light sensor Support
- Infrared sensor Support
- Wiegand port Support
- RS485 port Support
- RF Card Reader 13.56MHz (with NFC) & 125kHz
- Microphone -40dB
- Speaker 4Ω / 3W
- Power Supply 48VDC two-wire power supply
- Water-proof & Dust-proof IP65
- Installation Flush-mounted or Wall-mounted
- Flush-mounted Dimensions 189 x 120 x 56.5 mm
- Wall-mounted Dimensions 145 x 85 x 27.5 mm
- Working Humidity 10~90%
- Working Temperature -30°C ~ +60°C
- Storage Temperature -40°C ~ +70°C
- Protocols Support IPv4, HTTP, HTTPS, FTP, SNMP, DNS, NTP, RTSP, RTP, TCP, UDP, ICMP, DHCP, ARP
- Weight (Net) 0.60kg
- Weight (Gross) 0.70kg
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Akuvox 2 wire SIP Video Intercom system
