
Snom C520-WiMi
Flexible, wireless and cost-saving
conference call device

Snom C520-WiMi
Key features
· 2 detachable wireless microphones with
charging cradles built into the telephone
· 1 integrated hands-free microphone
· Bluetooth connectivity
· Wideband audio
· Flexible to use
· Allows for up to three C52-SP hands-free
units to be connected
The Snom C520 is a modern yet cost-efficient solution
for conference calls aimed at professionals and
companies of all sizes.
Thanks to the application of modern DECT and Bluetooth
technology, the C520 is the perfect tool for professional
collaboration. This conference-call device is fitted with
three advanced microphones, one of which is integrated
in the telephone along with a high-performance
Full-Duplex loudspeaker. Additionally, two DECT
microphones can be conveniently detached and placed
at a distance.
Each of the C520’s microphones features dynamic noise
cancellation, adaptive feedback control and HD-quality
audio which is guaranteed even in large spaces and
with numerous participants. In order to allow for the
best possible coverage, the microphones are capable of
real-time synchronisation based on their current
position. Thanks to this technology, users can move
around freely without having to worry about raising
their voice in order to be heard, even in sizeable
conference rooms.
Nowadays, connectivity is the most important factor in
efficient collaboration. Hence, the C520 is fitted with a
versatile Bluetooth interface to allow for connection
with mobile phones and headsets.
In order to guarantee perfect coverage in any
environment, the C520 conference-call system can also
be expanded: simply pair the telephone with C52
wireless hands-free units in order to quickly and easily
increase its range.

Technical Data
Benefits
· 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
(1)
C52-SP
wireless hands-free units
Firmware
Features
· 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)
· CLIP, CLIR
· Conference calling with three participants
Setup
· 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
Specifications
Protocols
· SIP (RFC3261)
· DHCP, (S)NTP
· HTTP / HTTPS / TFTP
· STUN
· LDAP (server-based directory)
· XSI (server-based directory)
Audio
· Codecs:
· G.711 A-law, µ-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
Security
· 802.1X authentication (with automatic provisioning)
· Transport layer security (TLS)
· SRTP (RFC3711), SIPS, RTCP
· HTTPS
· Password-protected web interface and administration
· VLAN (IEEE 802.1Q)
· LLDP-MED

Technical Data
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:
· HFP, HSP, A2DP, AVRCP
· Environmental conditions:
· Ambient temperature: from -5°C to 45°C
· Storage temperature: from -5°C to 60°C
· 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
Version 1.0.1 / de / 08 · 2017
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tected trademarks of Snom Technology GmbH. Other mentioned trademarks or registered trademarks are the property of their respective manufacturers or
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