Cisco 4 Line IP Phone with Display, PoE and Gigabit PC Port SPA514G

Caracteristici: Dynamic payload support• Adjustable audio frames per packet• DTMF - Dual-tone multifrequency, in-band and out-of-band (RFC 2833) (SIP INFO) • Flexible dial plan support with interdigit timers• IP address/URI dialing support• Call progress tone generation• Jitter buffer: adaptive Voice gateway :• SIP v2 - Session Initiation Protocol version 2 (RFC 3261, 3262, 3263, 3264)• SPCP - Smart Phone Control Protocol with UC500 • Nonintrusive in-service upgrades• Report generation and event logging• Statistics transmitted in BYE message• Debug and syslog server records: configurable per line • SIPFrag (RFC 3420)• Secure (encrypted) calling via SRTP• Codec name assignment Provisioning, administration, and maintenance:• Integrated web server provides web-based administration and configuration• Telephone keypad configuration via display menu/navigation • RTCP - Real Time Control Protocol (RFC 1889)• DiffServ - Differentiated Services (RFC 2475)• ToS - Type of Service(RFC 791, 1349) • TCP - Transmission Control Protocol (RFC793)• UDP - User Datagram Protocol (RFC 768)• RTP - Real Time Protocol (RFC 1889) (RFC 1890) • Frame loss concealment• VAD - Voice activity detection with silence suppression• Attenuation/gain adjustments Data networking : • MAC address (IEEE 802.3)• IPv4 - Internet Protocol v4 (RFC 791)• ARP - Address Resolution Protocol • SIP proxy redundancy - dynamic via DNS SRV, A records• Reregistration with primary SIP proxy server• SIP support in NAT networks (including STUN) • Automated provisioning and upgrade via HTTPS, HTTP, TFTP• TR-69, TR-104, and TR-111 Provisioning• Asynchronous notification of upgrade availability via NOTIFY • VLAN tagging 802.1p/Q - Layer 2 quality of service (QoS)• SNTP - Simple Network Time Protocol (RFC 2030) • Voice algorithms:G.711 (A-law and μ-law)G.726 (16/24/32/40 kbps)G.729 AG.722 • MWI - Message waiting indicator tones• VMWI - Voicemail waiting indicator, via NOTIFY, SUBSCRIBE• Caller ID support (name and number)• Third-party call control (RFC 3725) • DNS - A record (RFC 1706), SRV record (RFC 2782)• DHCP Client - Dynamic Host Configuration Protocol (RFC 2131)• ICMP - Internet Control Message Protocol (RFC 792) Altele: Physical interfaces : • Two 10/100/1000BASE-T RJ-45 Ethernet ports (IEEE 802.3) • Handset: RJ-9 connector • Built-in speakerphone and microphone • Headset 2.5-mm port