China Polycom VVX 250 Business IP Phone Color, Four-Line, Entry-Level IP Desk Phone Polycom VVX 250 Polycom VVX 250, Find details and Price about China Polycom VVX 250, VVX 250 from Polycom VVX 250 Business IP Phone Color, Four-Line, Entry-Level IP Desk Phone Polycom VVX 250 Polycom VVX 250
User interface features | • 2.8" color LCD screen (320x 240 pixel resolution) • Voicemail support1 • WebKit-based browser • Adjustable base height • Unicode UTF-8 character support • Single USB port (2.0 compliant) for media and storage applications • Multilingual user interface including Chinese, Danish, Dutch, English (Canada/ US/UK), French, German, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Slovenian, Spanish, and Swedish |
Feature keys | • 4 context-sensitive "soft" keys • 2 line keys with bi-color (red/green) LED • "Home" feature key • 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 |
Audio features | • Polycom HD Voice technology delivers life-like voice quality for each audio path handset, the hands-free speakerphone, and the optional headset • Polycom® Acoustic Clarity™ technology providing full-duplex conversations, acoustic echo cancellation and background noise suppression • Type 1 compliant (IEEE 1329 full duplex) • Frequency response - 150 Hz - 7 kHz for hands-free speakerphone, handset and optional headset mode • Codecs: G.711 (A-law and μ-law), G.729AB, G.722 (HD Voice), iLBC • Individual volume settings with visual feedback for each audio path • Voice activity detection • Comfort noise generation • DTMF tone generation (RFC 2833 and in-band) • Low-delay audio packet transmission • Adaptive jitter buffers • Packet loss concealment |
Headset and handset compatibility | Dedicated RJ-9 headset port • Hearing aid compatibility to ITU-T P.370 and TIA 504A standards • Compliant with ADA Section 508 Subpart B 1194.23 (all) • Hearing aid compatible (HAC) handset for magnetic coupling to hearing aids • Compatible with commercially-available TTY adapter equipment |
Call handling features1 | • 2 SIP identities (registrations) • 2 programmable line keys • Shared call/bridged line appearance • Flexible line appearance (one or two line keys can be assigned for each registration) • Distinctive incoming call treatment/call waiting • Call timer and call waiting • Call transfer, hold, divert (forward), pickup • Called, calling, connected party information • Local three-way audio conferencing • One-touch speed dial, redial • Remote missed call notification • Do not disturb function • Electronic hook switch capable • Local configurable digit map/dial plan |
Open application platform | • Supports Polycom Apps SDK and API for third- party business and personal applications2 • Bundled with Polycom UC Software: - Corporate Directory Access using LDAP - Visual Conference Management |
Network and provisioning | SIP Protocol Support • SDP • IETF SIP (RFC 3261 and companion RFCs) • Two-port Ethernet switch • 10/100Base-TX across LAN and PC Ports • Manual or dynamic host configuration protocol (DHCP) network setup • Time and date synchronization using SNTP • FTP/FTPS/TFTP/HTTP/HTTPS server-based central provisioning for mass deployments • Provisioning and call server redundancy supported • QoS Support - IEEE 802.1p/Q tagging (VLAN), Layer 3 TOS and Diffserv/DSCP • VLAN - CDP, DHCP VLAN discovery, LLDP MED for VLAN discovery • Network Address Translation (NAT) - support for static configuration and "Keep Alive" SIP signaling • RTCP and RTP support • Event logging • Syslog • Hardware diagnostics • Status and statistics reporting • TCP • UDP • DNS-SRV • IPv4 and IPv6 |
Security | • 802.1X Authentication and EAPOL • Media encryption via SRTP • Transport Layer Security (TLS) • Encrypted configuration files • Digest authentication • Password login • Support for URL syntax with password for boot server address • HTTPS secure provisioning • Support for signed software executables |
Power | • Built-in auto sensing IEEE 802.3af Power over • Ethernet (Class 2) • External Universal AC Adapter (optional, 12V 6W DC) |
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