Wideband acoustics Two-element speaker Support for DECT wireless extension microphones Session Initiation Protocol (SIP) signaling Device authentication and signaling encryption

Additional information




Cisco CP-8831-K9 IP Phone Overview


Take full control of conference calls with this Cisco Unified IP conference phone. It delivers superior high-definition audio and 360-degree coverage for conference rooms in a variety of sizes, along with executive offices. This phone system is a technologically advanced solution for highly secure communications, boasting wideband, full-duplex audio performance. The Cisco Unified IP conference phone delivers highly secure, comprehensive, mission-critical unified communications with especially comprehensive audio performance and flexible accessory options. Security is ensured thanks to device authentication and signaling encryption, which uses Transport Layer Security (TLS) with Advanced Encryption Standard 128 (AES-128). This Cisco phone system also includes support for daisy chaining two units, providing extended room coverage. Because it has a two-element speaker, the phone can capture the full voice spectrum, ensuring clear acoustics throughout the audio communication. Support for DECT wireless extension microphones is another feature of this conference call system; up to two microphones can be used simultaneously. This device also features Session Initiation Protocol (SIP) signaling, allowing for Internet telephony function for voice and video calls over online connections.


Display3.5'' - 396 x 162 pixel-based anti-glare graphical monochrome display with white backlight
Ethernet Switch10/100
Programmable Line Keys4
Number of Line Keys1
Full Duplex SpeakerphoneYes
Wideband AudioYes
PoE ClassificationClass 3
Hands FreeYes Speakerphone
Third-party Call ControlYes
Bluetooth / DECTDECT (mics)
PowerIEEE 802.3af line power, CP-PWR-CUBE-3
Dimensions (H x W x D)Base: 15.05 x 26.35 x 5.08 cm

Control panel: 14.61 x 12.7 x 2.54 cm
Signaling protocol supportSession Initiation Protocol (SIP)
Codec supportG.711, G.729 (a and ab), G.722, and Internet Low Bitrate Codec (iLBC)
Calling feature supportDialing (E.164)Adjustable ringing and volume levels adjustable display brightness applications launch padAuto-answerAuto-detection of headsetBargeCall forwardCall history listsCall timerCall waiting caller IDCorporate directoryConferenceDirect transferFast-dial serviceHoldImmediate divertJoinMessage-waiting indicatorMusic on holdMuteNetwork profiles (automatic)On- and off-network distinctive ringingPersonal directoryPredialing before sendingPrivacyRing tone per line appearance shared lineSurvivable Remote Site Telephony (SRST)Time and date displayTransferVoicemail
DirectoriesThe Cisco Unified IP Conference Phone 8831 identifies incoming messages and categorizes them for users on the screen. This feature allows you to quickly and effectively return calls using direct dial-back capability. The corporate directory integrates with the Lightweight Directory Access Protocol Version 3 (LDAPv3) standard directory.
AppsThe Apps softkey allows you to enter the Applications menu, where you are able to adjust display contrast, select background images (if available), and select from a large number of unique ringer sounds through the User Preference menu. Network Configuration preferences also can be set up (usually by the system administrator). Configuration can be either automatically or manually set up for Dynamic Host Control Protocol (DHCP), Trivial File Transfer Protocol (TFTP), Cisco Unified Communications Manager, and backup Cisco Unified Communications Manager instances.
HelpThe online Help feature gives you information about the phone keys, buttons, and features. The pixel display allows for more flexible feature navigation and significantly expands the information viewed when using features such as Services, Information, Messages, and Directory. For example, the Directory button can show local and server-based directory information.
Hold, Mute, and Redial keysThe Mute key is a fixed key. When it is active, the LED flashes on the Cisco Unified IP Conference Phone 8831 as well as on the optional wired and wireless microphone kits. Hold and Redial are provided as soft keys associated with the screen, and are always at the same position for easy access.
Wired control panelThe panel allows easy control of the unit and viewing of the display without having to move the entire unit.
DisplayThe conference station has a large high-resolution, graphical 3.5-inch backlit display (396 x 162 pixels).
SpeakerphoneThe Cisco Unified IP Conference Phone 8831 offers full-duplex high-quality wideband speakerphone technology. Included are Automatic Gain Control, comfort-noise generation, silence suppression and voice activity detection, Echo Suppression, and dynamic noise reduction, which reduces noise by up to 9 dB from constant noise sources such as fans or heating, ventilation, and air conditioning (HVAC) systems.

A two-way high-fidelity loudspeaker system provides superior speech clarity versus traditional conferencing systems.

Volume controlThe convenient Volume Control buttons on Cisco Unified IP Conference Phone 8831 provide for easy, decibel-level adjustments for the speakerphone and ringer.
Quality-of-service (QoS) optionsThe Cisco Unified IP Conference Phone supports DHCP and 802.1Q/p standards. The conference station can also be configured with an 801.1Q VLAN header containing the VLAN ID overrides configured by the Admin VLAN ID.
Multiple ring tonesUser-adjustable ring tones are available.
SecurityThe Cisco Unified IP Conference Phone 8831 supports device authentication through 802.1.x supplicant (TLS) and SRTP.
Configuration optionsYou can configure IP address assignment statically or through the DHCP client.




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