| General | 
      
        | Interface | Mini USB 2.0 Connector, Power over ethernet (PoE) | Mini USB 2.0 Connector, Power over ethernet (PoE) | 
      
        | Power source | IEEE 802.3af Power over Ethernet (PoE) | IEEE 802.3af Power over Ethernet (PoE) | 
      
        | Operating environment | Temperature: 0 - 40° C (32 - 104° F), Humidity: 20 - 85% (no condensation) | Temperature: 0 - 40° C (32 - 104° F), Humidity: 20 - 85% (no condensation) | 
      
        | Dimensions | Base Unit: 150 (W) x 123 (H) x 150 (D) mm (5.9 (W) x 4.84 (H) x 5.9 (D) in), Dialer Unit: 133 (W) x 41 (H) x 136 (D) mm (5.2 (W) x 1.6 (H) x 5.3 (D) in) | Base Unit: 150 (W) x 123 (H) x 150 (D) mm (5.9 (W) x 4.84 (H) x 5.9 (D) in), Dialer Unit: 133 (W) x 41 (H) x 136 (D) mm (5.2 (W) x 1.6 (H) x 5.3 (D) in) | 
      
        | Vekt | 1.3 kg (3 lbs) | 1.3 kg (3 lbs) | 
      
        | Accessories | USB cable 2 m (6.56 ft.),  Ethernet Cable, 25 ft (7.62 m),  Quick Start Guide | USB cable 2 m (6.56 ft.),  Ethernet Cable, 25 ft (7.62 m),  2 Directional Extension Microphones, Quick Start Guide | 
      
        | Other | RoHS Compliant | RoHS Compliant | 
      
        | Audio | 
      
        | Microphones | 4 embedded directional, 360° Audio Pick-Up | 4 embedded directional, 360° Audio Pick-Up + 2 directional extension microphones | 
      
        | Høyttalere | Tweeter, Mid-Woofer | Tweeter, Mid-Woofer | 
      
        | Maximum volume | Momentary maximum: 91 dB (1 m) | Momentary maximum: 91 dB (1 m) | 
      
        | Frequency bandwidth | For sound pickup: 160 Hz - 16,000 Hz, For playback: 160 Hz - 20,000 Hz | For sound pickup: 160 Hz - 16,000 Hz, For playback: 160 Hz - 20,000 Hz | 
      
        | Signal processing | Adaptive echo canceller, Noise reduction | Adaptive echo canceller, Noise reduction | 
      
        | SIP | 
      
        | Number of Lines | 3+1 Lines: Up to 2 SIP calls, 1 USB call, plus the user | 3+1 Lines: Up to 2 SIP calls, 1 USB call, plus the user | 
      
        | Codes | G.711 (A-law and μ-law), G.722, G.726, G.729 | G.711 (A-law and μ-law), G.722, G.726, G.729 | 
      
        | Security | SRTP/SRTCP Support (RFC 1889), IETF SIP support (RFC 3261 and companion RFCs), SSIP, Password protected configuration files, Password protected login, HTTPS Secure Provisioning | SRTP/SRTCP Support (RFC 1889), IETF SIP support (RFC 3261 and companion RFCs), SSIP, Password protected configuration files, Password protected login, HTTPS Secure Provisioning | 
      
        | Others | [Call Handling] Make Call, Answer, Hold, Resume, Transfer (Blind and  Supervised), Forwarding, Do not disturb, Redial, Call Timer, Call ID, Speed Dial, Missed Call Notifications, Voice Mail Notifications (switch-configured), [Call Bridging] Supports Bridging SIP and USB Calls. Join, Split, Hold, Resume, [DTMF Support] RTP event, SIP in-band, SIP info package support, [Network Provisioning] DHCP or Static IP, Server Based Central Provisioning, Web Portal for Individual Unit Configuration | [Call Handling] Make Call, Answer, Hold, Resume, Transfer (Blind and  Supervised), Forwarding, Do not disturb, Redial, Call Timer, Call ID, Speed Dial, Missed Call Notifications, Voice Mail Notifications (switch-configured), [Call Bridging] Supports Bridging SIP and USB Calls. Join, Split, Hold, Resume, [DTMF Support] RTP event, SIP in-band, SIP info package support, [Network Provisioning] DHCP or Static IP, Server Based Central Provisioning, Web Portal for Individual Unit Configuration |