Akuvox - R20K-2 - 2 Wire SIP Intercom with Keypad and RF Card Reader
Akuvox R20K-2 is a compact 2-wire SIP video door phone with a numeric keypad, designed for apartment and office building retrofitting. It features a 2MP 110° wide-angle camera, two-way audio communication with echo cancellation, and complies with the SIP standard for integration with SIP-based PBX systems. The unit supports ONVIF for NVR integration, visitor snapshot to email, and includes an RFID card reader (13.56 MHz & 125kHz) and a keypad PIN code for keyless entry.
Key Configuration
- • Camera: 2MP, 110°(H) / 58°(V) viewing angle, 1920x1080p resolution at 25fps
- • Sensor: 1/2.7" CMOS; minimum illumination: 0.1 LUX
- • RF card reader: 13.56MHz (with NFC) & 125kHz
- • Relays out: 1; inputs: 1; Wiegand port and RS485 port supported
- • Power supply: 48VDC two-wire power supply
Key Features
• Full metal aluminum vandal-resistant body; IP65 water and dust resistance rating
• High intensity IR LEDs for night viewing with auto-night mode and internal light sensor
• Two-way audio communication over IP with echo cancellation; audio codecs: G.711a, G.711μ, G.729 (narrowband), G.722 (broadband)
• Video codec: H.264; supports video preview and visitor snapshot to email
• SIP v1 (RFC2543) and SIP v2 (RFC3261) compliance; DTMF: in-band, out-of-band (RFC2833), SIP Info
• ONVIF standard for easy NVR integration; protocols: IPv4, HTTP, HTTPS, FTP, SNMP, DNS, NTP, RTSP, RTP, TCP, UDP, ICMP, DHCP, ARP
Technical Context
Auto-provisioning support; web management portal; web-based packet dump; configuration backup/restore; entry log export; access table export/import; firmware upgrade; system logs (including door access logs). Relays are controlled individually by DTMF tones. The camera is permanently operational. White balance: auto. Audio features: voice activation detection, comfort noise generator. Installation: flush-mounted (226×108×52mm) or wall-mounted (185×85×29mm).
Installation Notes
Flush-mounted dimensions: 226 × 108 × 52 mm; wall-mounted dimensions: 185 × 85 × 29 mm. Working temperature: -30°C to +60°C; storage temperature: -40°C to +70°C; working humidity: 10–90% (non-condensing). IP65 water/dust resistance. Power interface: 1; 48VDC two-wire power supply. Speaker: 4Ω / 3W. Microphone: -40dB. Front panel material: aluminum alloy.
| Physical & Power | |
| Front panel | Aluminum alloy |
| Camera | 2M pixels, automatic lighting |
| Keypad | Yes |
| Light sensor | Support |
| Infrared sensor | Support |
| Wiegand port | Support |
| RS485 port | Support |
| RF card reader | 13.56 MHz (with NFC) & 125 kHz |
| Relays out | 1 |
| Inputs | 1 |
| Microphone | -40 dB |
| Speaker | 4Ω / 3W |
| Power Interface | 1 |
| Power supply | 48 VDC two-wire power supply |
| Water-proof & Dust-proof | IP65 |
| Installation | Flush-mounted or Wall-mounted |
| Flush-mounted Dimensions | 226 × 108 × 52 mm |
| Wall-mounted Dimensions | 185 × 85 × 29 mm |
| Working Humidity | 10 ~ 90% |
| Working Temperature | -30°C ~ +60°C |
| Storage Temperature | -40°C ~ +70°C |
| Audio | |
| SIP Protocols | SIP v1 (RFC2543), SIP v2 (RFC3261) |
| Narrowband audio codec | G.711a, G.711μ, G.729 |
| Broadband audio codec | G.722 |
| DTMF | In-band, out-of-band DTMF (RFC2833), SIP Info |
| Echo Cancellation | Yes |
| Voice Activation Detection | Yes |
| Comfort Noise Generator | Yes |
| Video | |
| Sensor | 1/2.7", CMOS |
| Pixels (Resolutions) | CIF, QCIF, VGA, 4CIF, 720p, 1080p |
| Video codec | H.264 |
| Video resolution (max) | up to 1920 × 1080p |
| Max. image transfer rate | 1080p – 25 fps |
| Viewing angle | 110° (H) / 58° (V) |
| IR LEDs | High intensity IR LEDs for picture lighting during dark hours with internal light sensor |
| 3rd-Party Compatibility | Compatible with 3rd-Party Video components, e.g. NVRs |
| Door Entry Feature | |
| Relays control | Relays controlled individually by DTMF tones |
| Camera operation | Camera permanently operational |
| Night mode | Auto-night mode with LED illumination |
| White balance | Auto |
| Minimum illumination | 0.1 LUX |
| Networking & Protocol | |
| Protocols support | IPv4, HTTP, HTTPS, FTP, SNMP, DNS, NTP, RTSP, RTP, TCP, UDP, ICMP, DHCP, ARP |
| Deployment & Maintenance | |
| Features | • Auto-Provisioning • Web management portal • Web-based packet dump • Configuration backup / restore • Entry log export • Access table export/import • Firmware upgrade • System logs (include door access logs) • Office door phone with on-site or hosted IP-PBX • Remote site entry over the Internet • Apartment/flat intercom with door access control |
