| Lines (Direct Numbers) | - Up to 2 lines with up to 2 calls per line
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| Display | - 102 x 33 pixel-graphical LCD
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| Feature Keys | - 3 context-sensitive “soft” keys
- 2 line keys with bi-color (red/green) LED
- 2 feature keys (“Menu” and “Dial”)
- 4-way navigation key cluster with center “Select” key
- 2 volume control keys
- Dedicated hold key
- Dedicated headset key
- Dedicated hands-free speakerphone key
- Dedicated microphone mute key
- Headset Compatibility
- Dedicated 2.5-mm headset port compatible with most monaural mobile phone headsets
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| Hearing Aid Compatibility | - Compliant with ADA Section 508 Recommendations: Subpart B 1194.23 (all)
- Hearing Aid Compatible (HAC) handset for magnetic coupling to approved HAC hearing aids
- Compatible with commercially-available TTY adapter equipment
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| Audio Features | - Full-duplex hands-free speakerphone with Polycom Acoustic Clarity Technology
- Type 1 compliant with IEEE 1329 full duplex standards
- Frequency response - 300Hz - 3300Hz for handset, headset and hands-free speakerphone modes
- Codecs: G.711 µ/A and G.729A (Annex B)
- Individual volume settings with visual feedback for each audio path
- Voice activity detection
- Comfort noise fill
- DTMF tone generation / DTMF event RTP payload
- Low-delay audio packet transmission
- Adaptive jitter buffers
- Packet loss concealment
- Acoustic echo cancellation
- Background noise suppression
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| Call Handling Features | - Shared call / bridged line appearance
- Flexible line appearance (one or more line keys can be assigned for each line extension)
- Distinctive incoming call treatment / call waiting
- Call timer
- Call transfer, hold, divert (forward), pickup
- Called, calling, connected party information
- Local three-way conferencing
- One-touch speed dial, redial
- Call waiting
- Remote missed call notification
- Intercom
- Automatic off-hook call placement
- Do not disturb function
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| Other Features | - Interoperability with Microsoft LCS 2005 for telephony and presence
- Compatibility with Microsoft Office Communicator and Windows® Messenger 5.1 Clients
- Enabled for Polycom Productivity Suite
- Local feature-rich GUI
- Time and date display
- User-configurable contact directory and call history (missed, placed and received)
- Wave file support for call progress tones
- Unicode UTF-8 character support. Multilingual user interface encompassing Danish, Dutch, English (Canada / US / UK), French, German, Italian, Norwegian, Portuguese, Russian, Spanish, Swedish
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| Protocol Support | - IETF SIP (RFC 3261 and companion RFCs)
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| Network and Provisioning | - SoundPoint IP 330 – two-port 10/100 Mbps Ethernet switch
- SoundPoint IP 320 – single 10/100 Mbps Ethernet port
- Manual or dynamic host configuration protocol (DHCP) network setup
- Time and date synchronization using SNTP
- FTP / TFTP / HTTP / HTTPS server-based central provisioning for mass deployments
- Provisioning and call server redundancy supported
- Web portal for individual unit configuration
- QoS Support – IEEE 802.1p/Q tagging (VLAN), Layer 3
- TOS, and DSCP
- Network Address Translation (NAT) support for static configuration and "Keep-Alive" SIP signalling
- RTCP support (RFC 1889)
- Event logging
- Syslog
- Local digit map
- Hardware diagnostics
- Status and statistics reporting
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| Security | - Transport Layer Security (TLS)
- Encrypted configuration files
- Digest authentication
- Password login
- Support for URL syntax with password for boot server
- HTTPS secure provisioning
- Support for signed software executables
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| Power | - Built-in, auto-sensing IEEE 802.3af Power over Ethernet (Class 1)
- External universal input AC adapter (optional; 24V DC @ 500mA)
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| Size | - 6.7 in x 5.7 in x 6.9 in x 1.4 in
- (17 cm x 14.5 cm x 17.5 cm x 3.5 cm)
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| Weight | - Phone weight: 1.37 lb (0.625 kg)
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