Akuvox - R28A IP Door Intercom Unit with Colour Display Screen Numeric Keypad Camera RFID & IP65
- 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 R28A SIP-enabled Video IP Intercom device is an elegant intercom with integrated colour camera, colour LCD display, digital phonebook, RFID card reader and numeric keypad.
The R28A enables door access through visual-to-visual communication where talking to and seeing visitors, as if in person, reinforces security in granting or denying access.
The Akuvox R28A Door Intercom model includes keypad for code-controlled access or communication with additional SIP devices on the network. It also features contactless RFID card reader for secure authentication and access via RFID card or keyfob.
The Akuvox R28A Door Intercom features:
Premium audio and video quality (H.265 codec)
4.3 inch colour LCD display screen
Vandal resistant all-aluminum body
116° wide angle 2M pixel camera with automatic lighting
Supports multiple access control methods: NFC, RFID, digital phonebook, keypad
Ideal for applications such as in domestic residence or office buildings, the R28A enables easy monitoring of an entrance area and convenient entry control.
Requires additional installation backbox (R27R28XF flush mount or R27R28XS surface mount) sold separately.
SIP Endpoint
- SIP v1 (RFC2543) SIP v2 (RFC3261)
- Audio codecs: G.711a, G.711u, G.722, G.729
- Video codecs: H.264, H.265
- Echo cancellation
- Voice Activation Detection
- Comfort Noise Generator
Video
- Resolution: up to 1920 x 1080p
- Maximum image transfer rate: 1080p - 30rfps
- High intensity IR LEDS for picture lighting during dark hours with internal light sensor
- Compatible for 3rd party video components e.e. NVRs
Door Entry Features
- Relays controlled individually by DTMF tones
- Camera permanently operational
- White balance: auto
- Auto-night mode with LED illumination
- Premium audio and video quality
- Real-time entrance monitoring
- Digital phonebook
- RFID card reader and numeric keypad
- SIP/ONVIF/Wiegand/PoE/IP65
- 116° wide-angle 3MP camera with automatic lighting
- Supports multiple access control methods: NFC, RFID, keypad
- Vandal resistant all-aluminium body
- Remote door opening
Description R28A
- Enclosure Rating IP65
- Camera 2M pixels, with automatic lighting
- Button Manager center, dial key and clear key
- Keypad Numeric keypad
- RFID Card Reader 13.56MHz and 125 kHz
- PoE IEEE802.3af
- IR Compatibility Supports infrared sensor
- Safety G-sensor for tamper alarm
- Power Consumption 12v DC input, less than 12W
- Operating Temperature -4° to 131°F / -20° to 55°C (Anti-cold version available: -40 to 131°F / -40 to 55°C)
- Installation Flush mounting or Wall-mounting
- Material Fully aluminium & vandal resistant
- Display 4.3 inch
- Dimensions (wallmounted) 280(H) x 130(W) x 38(D) mm
- Dimensions (flush mounted) 280(H) x 130(W) x 68(D) mm
- Weight (Net) 1.00kg
- Weight (Gross) 1.20kg
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Akuvox R28A Multi-dwelling SIP Intercom with Numeric Keypad, Camera, RFID & IP65
