 | Lighted line keys: 5 illuminated call appearance line buttons with tricolor LEDs |
 | Hold key: Puts current call on hold Voicemail key 1-button access to voicemail |
 | Menu key: Accesses call history, directory, speed dials, MP3 player, web applications, user preferences, network configuration, device administration, and status |
 | Lighted mute key: Lights up red when the call is on mute, and turns off when mute is removed. Also lights red in the event of a network failure |
 | Lighted headset key: Lights up green when pressed and using a Bluetooth or 2.5-mm headset for hands-free calling |
 | Lighted speakerphone key: Activates full-duplex speakerphone; stays lit while speakerphone is on |
 | Lighted message waiting indicator: Lights when there is new voicemail; visible on the phone chassis above the LCD screen; stays lit until the new voicemail has been processed by the user |
 | Graphical display: Color 3.2-in. QVGA (320 x 240 pixels) backlit LCD graphical display |
 | 5-way navigational buttons: Navigating menus and multimedia applications |
 | 4 soft-key buttons: Dynamically present calling options to the user |
 | Network features: Cisco Discovery Protocol, IEEE 802.1p/Q |
 | Wi-Fi: 802.11b/g, Wi-Fi Multimedia (WMM) (802.11e) |
 | Wi-Fi security: |
 | Wired Equivalent Privacy (WEP), 64 or 128 bit |
 | Wi-Fi Protected Access (WPA), Personal and Enterprise |
 | WPA2, Personal and Enterprise |
 | Wi-Fi Protected Setup (WPS) |
 | Ethernet switch: 10/100 PC switch port enables LAN connectivity to a co-located PC. Can designate separate VLANs (802.1Q) for the PC and Cisco IP phones, providing improved security and reliability of voice and data traffic. 802.3af PoE WAN port; disabled when phone is used in Wi-Fi mode |
 | Volume control: Volume-control toggle provides easy decibel-level adjustments of the handset, monitor speaker, and ringer |
 | Applications: |
 | Customizable screen saver on phone display (Photo Album) |
 | Music player (MP3) |
 | RSS web services |
 | Cisco MonitorView |
 | SIP third-party call control for server-based applications |
 | Lightweight Directory Access Protocol (LDAP) and Cisco XML-based corporate directory support |
 | Cisco XML services interface (XSI) |
 | Call control and audio features: |
 | Call hold |
 | Music on hold** |
 | Call waiting |
 | Caller ID name and number and outbound caller ID blocking |
 | Caller ID mapping for incoming calls |
 | Outbound caller ID blocking |
 | Call transfer - attended or blind |
 | Call conferencing - hosted (N-party) or local (3-party) |
 | Call forwarding - unconditional, no answer, on busy |
 | Visual voice message waiting indicator (VMWI) |
 | Shared/bridge line appearance** |
 | Call pickup - selective and group** |
 | Call park and unpark** |
 | Call back on busy |
 | Call blocking - anonymous and selective |
 | Do not disturb |
 | Intercom** |
 | Group paging** |
 | Extension mobility** |
 | Configurable dial/numbering plan support with inter-digit timers - per line |
 | URL (IP) dialing support |
 | Distinctive ringing based on calling and called number |
 | Supplementary services feature activation codes |
 | Supplementary services announcements codes |
 | Configurable supplementary services soft keys |
 | Individual volume setting per audio path (headset/handset/speaker) |
 | **Feature requires support by SIP/SPCP client management server. |
 | Voice features: |
 | SIP proxy redundancy - dynamic via DNS SRV, A records |
 | Re-registration with primary SIP proxy server |
 | SIP support in Network Address Translation (NAT) networks, including simple traversal of User Datagram |
 | Protocol (UDP) through NAT (serial tunnel [STUN]) |
 | Codec name assignment |
 | G.711 (A-law and µ-law) |
 | G.726 (32 kbps) |
 | G.729 AB |
 | G.722, Wideband AudioVoice algorithms |
 | Dynamic payload support |
 | Adjustable audio frames per packet |
 | Dual-tone multi-frequency (DTMF): in-band and out-of-band (RFC 2833), SIP INFO (RFC 2976) |
 | Flexible dial plan support with inter-digit timers |
 | IP address/Uniform Resource Identifier (URI) dialing support |
 | Call progress tone generation |
 | Jitter buffer - adaptive |
 | Frame loss concealment |
 | Voice activity detection (VAD) with silence suppression |
 | Attenuation/gain adjustments |
 | VMWI via NOTIFY, SUBSCRIBE |
 | Caller ID support (name and number) |
 | Data features: |
 | 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) |
 | Point-to-Point Protocol over Ethernet (PPoE) client (RFC 2516) |
 | Internet Control Message Protocol (ICMP) (RFC 792) |
 | TCP (RFC 793) |
 | UDP (RFC 768) |
 | Real Time Protocol (RTP) (RFC 1889, 1890) |
 | Real Time Control Protocol (RTCP) (RFC 1889), RTCP-XR (RFC 3611) |
 | Differentiated Services (DiffServ) (RFC 2475), type of service (ToS) (RFC 791, 1349) |
 | VLAN tagging 802.1p/Q |
 | Simple Network Time Protocol (SNTP) (RFC 2030) |