Cisco SPA303 telefono IP - VoIP SIP Cisco SPA 303 gestice fino a 3 accounts VoIP IP SIP, 2 porte Switch (LAN ethernet), testato per garantire l'interoperabilità completa con i leader del mercato VoIP, permettendo ai service provider di fornire servizi ricchi di funzionalità e altamente competitivi per i propri clienti.

Al telefono IP Cisco SPA 303 possono essere abbinati servizi come VoiceView Express e le applicazioni Cisco XML per quando si interfaccia con Cisco Unified Communications Serie 500 in modalità SPCP.

Cisco SPA303 utilizza protocolli standard di crittografia sicuri per eseguire il provisioning remoto e un servizio aggiornamento software non intrusivo.

Caratteristiche di Cisco SPA303
Data networking
• MAC address (IEEE 802.3)
• IPv4 (RFC 791)
• Address Resolution Protocol (ARP)
• DNS: A record (RFC 1706), SRV record (RFC 2782)
• Dynamic Host Configuration Protocol (DHCP) client (RFC 2131)
• Internet Control Message Protocol (ICMP) (RFC 792)
• TCP (RFC 793)
• User Datagram Protocol UDP (RFC 768)
• Real Time Protocol RTP (RFC 1889, 1890)

• Real Time Control Protocol (RTCP) (RFC 1889) • Real Time Control Protocol - Extended Report ( RTCP-XR) ( RFC 3611 )
• Differentiated Services (DiffServ) (RFC 2475)
• Type of service (ToS) (RFC 791, 1349)
• VLAN tagging 802.1p/Q: Layer 2 quality of service (QoS)
• Simple Network Time Protocol (SNTP) (RFC 2030)

Voice gateway
• SIP version 2 (RFC 3261, 3262, 3263, 3264)
• SPCP with the Cisco Unified Communications 500 Series
• SIP proxy redundancy: dynamic via DNS SRV, A records
• Re-registration with primary SIP proxy server
• SIP support in NAT networks (including STUN)
• SIPFrag (RFC 3420)
• Highly secure (encrypted) calling via Secure Real-Time Transport Protocol (SRTP)
• SIP/TLS
• Codec name assignment

Codecs Voce Cisco SPA303
• G.711 (A-law and μ-law)
• G.726 (16/24/32/40 kbps)
• G.729 AB
• G.722

• Dynamic payload support
• Adjustable audio frames per packet
• Dual-tone multifrequency (DTMF), 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
• Frame loss concealment
• Voice activity detection (VAD) with silence suppression
• Attenuation/gain adjustments
• Message waiting indicator (MWI) tones
• Voicemail waiting indicator (VMWI), via NOTIFY, SUBSCRIBE
• Caller ID support (name and number)
• Third-party call control (RFC 3725)

Porte e interfacce • Two 10/100BASE-T RJ-45 Ethernet ports (IEEE 802.3)
• Handset: RJ-9 connector
• Built-in speakerphone and microphone
• Headset 2.5-mm port (attacco per cuffia jack)
Provisioning, administration and maintenance
• Integrated web server provides web-based administration and configuration
• Telephone keypad configuration via display menu/navigation
• Automated provisioning and upgrade via HTTPS, HTTP, TFTP
• Asynchronous notification of upgrade availability via NOTIFY
• Nonintrusive in-service upgrades
• Report generation and event logging
• Statistics transmitted in BYE message
• RTCP-XR
• Syslog and debug server records: configurable per line

Alimentazione
• Switching type (100-240V) automatic
• DC input voltage: +5 VDC at 1.0A maximum

Led e indicatori
• Speakerphone on/off button with LED
• Headset on/off button with LED
• Mute button with LED
• Message waiting indicato
r LED
• LED test function

Dimensioni220 x 198 x 30 mm

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