Snom C520

Product Description

The Snom C520 is a modern and cost-effective conferencing solution for enterprises of any scale.

Thanks to advanced DECT and Bluetooth technology, the C520 is the perfect device for team conferencing and offers three cutting-edge microphones. The first of these is built into the high-performance full-duplex speaker in the main base station with two further wireless DECT microphones that can be freely placed or carried in the room as required.

The C520 microphones use dynamic noise reduction and adaptive feedback control to provide crystal clear HD audio transmission, even in crowded or spacious rooms. The microphones synchronize with the base station in real-time according to their location. This technology allows the user freedom of movement without even having to raise their voice regardless of meeting room size.

Connectivity is now one of the most important factors for effective collaboration. This is why the C520 features a versatile Bluetooth interface allowing smartphones or DECT phones to be easily paired and used.

To extend the C520 conference system across even larger areas, simply couple wireless C52 loudspeaker units to the base unit and the range of the loudspeakers and microphones will be increased greatly.



  • Two detachable DECT wireless microphones with a range of up to 50 metres
  • Full-duplex hands-free talking
  • Wideband audio transmission
  • Bluetooth connectivity for two devices, such as a mobile phone or a headset
  • Mute function on the telephone and microphones
  • Multi-coloured LEDs to indicate the status
  • Perfect for home-offices, small companies and multi-room conference calls
  • Can be expanded with up to three C52-SP (1) wireless hands-free units


  • 3 SIP identities/accounts
  • Call lists for dialled, received and missed calls with 200 entries
  • Local directory with 200 entries
  • Multiple language support
  • DTMF in-band / out-of-band and SIP-INFO
  • Interoperable with all major IP PBX platforms

Call features

  • Speed dialling
  • Local dial plan
  • Call waiting
  • Call blocking (automatic denial)
  • Hold
  • Call transfer
  • Call forwarding synchronised with the server, do not disturb mode (DND)
  • Conference calling with three participants


  • Configuration via web interface
  • Provisioning:
    • PnP
    • Automatic loading of settings via HTTP/HTTPS/TFTP
    • Regular or weekly settings synchronisation
    • DHCP Options 66, 159, 160
    • Snom secure redirection service
  • Password-protected configuration files



  • SIP (RFC3261)
  • DHCP, (S)NTP
  • STUN
  • LDAP (server-based directory)
  • XSI (server-based directory)


  • Codecs:
    • G.711 A-law, -law
    • G.722 (wideband)
    • G.726
    • G.729
  • Echo suppression
  • CNG (Comfort Noise Generator)
  • Automatic gain control (AGC)

User interface

  • Graphical backlit display (158 x 57 pixels)
  • Localization (language, time zone, dial tone)
  • 3 context-sensitive keys
  • LED status lights (call, mute, Bluetooth, etc.)
  • Microphone: mute function on telephone or microphones
  • Volume key
  • 4-way navigation key, Ok key and Cancel key
  • Menu-driven user interface


  • 802.1X authentication (with automatic provisioning)
  • Transport layer security (TLS)
  • SRTP (RFC3711), SIPS, RTCP
  • Password-protected web interface and administration
  • VLAN (IEEE 802.1Q)

Hardware features

  • Dimensions (approx.):
    • 269 x 282 x 59 mm (HxLxW)
  • Weight (approx.): device 1.5 kg
  • Input voltage: 12 V DC (SELV)
  • Ethernet port: 10/100 MB
  • Power supply: PoE or power adapter included
  • Class 3 PoE
  • Bluetooth connectivity for two external devices
  • Bluetooth protocol:
  • Environmental conditions:
    • Ambient temperature: from -5C to 45C
    • Storage temperature: from -5C to 60C
    • Humidity: up to 95% (non-condensing)
  • Included in delivery:
    • Conference-call device
    • 2 wireless DECT microphones with batteries
    • Power adapter
    • 2 Ethernet cables
    • Quick installation guide
  • Colour: black
  • Warranty: 2 years
  • Part number: 00004356

Type approval

  • CE mark
  • Safety IEC 60950

(1) Optional accessory
Part numbers for optional accessories 00004357 C52-SP hands-free unit

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