Telephony Features

• Three voice lines
• Pixel-based display: 128 x 64 monochrome graphical liquid crystal display (LCD)
• Line status: active line indication, name and number
• Menu-driven user interface
• Shared line appearance
• Speakerphone
• Call hold
• Music on hold
• Call waiting
• Caller ID name and number
• Outbound caller ID blocking
• Call transfer: attended and blind
• Three-way call conferencing with local mixing
• Multiparty conferencing via external conference bridge
• Automatic redial of last calling and last called numbers
• On-hook dialing
• Call pickup: selective and group
• Call park and unpark
• Call swap
• Call back on busy
• Call blocking: anonymous and selective
• Call forwarding: unconditional, no answer, and on busy
• Hot line and warm line automatic calling
• Call logs (60 entries each): made, answered, and missed calls
• Redial from call logs
• Personal directory with auto-dial (100 entries)
• Do not disturb
• Digits dialed with number auto-completion
• Anonymous caller blocking
• Support for Uniform Resource Identifier (URI) (IP) dialing (vanity numbers)
• On-hook default audio configuration (speakerphone and headset)
• Multiple ring tones with selectable ring tone per line
• Called number with directory name matching
• Ability to call number using name: directory matching or via caller ID
• Subsequent incoming calls show calling name and number
• Date and time with support for intelligent daylight savings
• Call duration and start time stored in call logs
• Call timer
• Name and identity (text) displayed at startup
• Distinctive ringing based on calling and called number
• 10 user-downloadable ring tones
• Speed dialing, eight entries
• Configurable dial/numbering plan support
• Intercom
• Group paging
• Network Address Translation (NAT) traversal, including Serial Tunnel (STUN) support
• DNS SRV and multiple A records for proxy lookup and proxy redundancy
• Syslog, debug, report generation, and event logging
• Support for highly secure encrypted voice communications
• Built-in web server for administration and configuration with multiple security levels
• Automated remote provisioning, multiple methods; up to 256 bit encryption (HTTP, HTTPS, Trivial File Transfer Protocol)
• Option to require administrator password to reset unit to factory defaults

Hardware Features

• Pixel-based display: 128 x 64 monochrome LCD graphical display
• Dedicated illuminated buttons for: Audio mute on/off, Headset on/off, Speakerphone on/off
• Four-way rocking directional knob for menu navigation
• Voicemail message waiting indicator light
• Voicemail message retrieval button
• Dedicated hold button
• Settings button for access to feature, setup, and configuration menus

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
• Voice algorithms: 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)

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

Power Supply

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

Physical Interfaces

• 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

Security Features

• Password-protected system, preset to factory defaults
• Password-protected access to administrator and user-level features
• HTTPS with factory-installed client certificate
• HTTP digest: encrypted authentication via MD5 (RFC 1321)
• Up to 256-bit Advanced Encryption Standard (AES) encryption

Package Contents

• Cisco SPA 303 IP phone, handset, and stand
• Handset cord
• RJ-45 Ethernet cable
• Power adapter
• Quick installation guide
• CD

Physical

• Dimensions (W x H x D): 8.66 x 7.80. x 1.18 in. (220 x 198 x 30 mm)
• Unit Weight: 1.50 lb ( 0.68kg)
• Operating Temperature: 32º ~ 113ºF (0º ~ 40ºC)
• Storage Temperature: -13º ~ 185ºF (-20º ~ 70ºC)
• Operating Humidity: 5% to 95% noncondensing
• Storage Humidity: 5% to 95% noncondensing

Regulatory Compliance

• FCC (Part 15, Class B)
• UL
• CE Mark
• A-Tick