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 C52-SP (1) wireless hands-free units

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

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)
• Localisation (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

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 (EU)
  -2 Ethernet cables
  -Quick installation guide
• Colour: black
• Warranty: 2 years

Type Approval

• CE mark
• Safety IEC 60950

Optional Accessories

• 00004357 C52-SP hands-free unit