VoIP phone SIP RTCP RTP SRTP SDP 5 lines Power Adapter Sold Separately

Additional information




Cisco CP-8841-K9 IP Phone Overview


The Cisco IP Phone 8841 delivers mission-critical voice communications that are highly secure and easy to use. It offers wideband audio and a large, widescreen, high-resolution color display for menus and content. The 8841 is ideal for knowledge workers, administrative staff, and managers in mid-sized to large businesses. As a low-power device, it is both cost-effective and earth-friendly.


Display5'' high-resolution (800480) WVGA color display
Ethernet Switch10/100/1000
Programmable Line Keys4
Number of Line Keys5
Full Duplex SpeakerphoneYes
Wideband AudioYes
PoE ClassificationClass 2
Third-party Call ControlYes
Replaceable BezelYes(Black, Silver)
Wall MountableYes
Package Weight1.7 Kg
Audio codec support G.711a-law and mu-law, G.722, G.729a, Internet Low Bitrate Codec (iLBC), and Internet Speech Audio Codec (iSAC)
Call features  + Dialing

  Abbreviated dialing

  Adjustable ring tones and volume levels

  Adjustable display brightness

  Agent greeting


  Auto-detection of headset


  Busy Lamp Field (BLF)

  Busy Lamp Field (BLF) Pickup

  Busy Lamp Field (BLF) speed dial


  Call forward

  Call forward notification

  Call filter

  Call history lists

  Call park

  Call pickup

  Call timer

  Call waiting

  Call chaperone

  Caller ID

  Corporate directory

  Conference, including traditional Join feature

  Cross Cluster Extension Mobility (EMCC)

  Direct transfer

  Extension mobility

  Fast-dial service

  Forced access codes and client matter codes

  Group call pickup



  Immediate divert

  Malicious-caller ID

  Message-waiting indicator (MWI)

  Meet-me conference


  Music on hold (MoH)


  Network profiles (automatic)

  On- and off-network distinctive ringing

  Personal directory


  Predialing before sending


  Private Line Automated Ringdown (PLAR)


  Ring tone per line appearance

  Service Uniform Resource Locator (URL)

  Shared line

  Silent monitoring and recording

  Speed dial

  Time and date display


  Uniform Resource Identifier (URI) dialing

  Visual voice mail

  Voice mail

  Whisper coaching

Electronic hookswitchYou can control the hookswitch electronically with a third-party headset connected to the auxiliary port.
Quality-of-service (QoS) options  The phone supports Cisco Discovery Protocol and 802.1Q/p standards, and can be configured with an 801.1Q VLAN header containing the VLAN ID overrides configured by the Admin VLAN ID.
Network features  Session Initiation Protocol (SIP) for signaling

  Session Description Protocol (SDP)

  IPv4 and IPv6

  User Datagram Protocol (UDP) (used only for Real-Time Transport Protocol [RTP] streams)

  Dynamic Host Configuration Protocol (DHCP) client or static configuration

  Gratuitous Address Resolution Protocol (GARP)

  Domain Name System (DNS)

  Trivial File Transfer Protocol (TFTP)

  Secure Hypertext Transfer Protocol (HTTPS)


  Real-Time Transport Protocol (RTP)

  Real-Time Control Protocol (RTCP)

  Cisco Peer-to-Peer Distribution Protocol (PPDP)

  Cisco Discovery Protocol

  LLDP (including LLDP-MED)

  Switch speed auto-negotiation

Security features  Secure boot

  Secure credential storage

  Device authentication

  Configuration file authentication and encryption

  Image authentication

  Random bit generation

  Hardware cryptographic acceleration

  Certificate Authority Proxy Function (CAPF)

  Manufacturer-Installed Certificates (MIC)

  Locally Significant Certificates (LSC)

  Ethernet 802.1x supplicant options: Extensible Authentication Protocol-Flexible Authentication via Secure Tunneling (EAP-FAST) and Extensible Authentication Protocol-Transport Layer Security (EAP-TLS)

  Signaling authentication and encryption using TLS

  Media authentication and encryption using SRTP

  HTTPS for client and server

  Secure Shell (SSH) Protocol server

  SSL-based VPN client

Physical dimensions
(H  W  D)
  9.02 x 10.13 x 1.57 in. (229.1 x 257.34 x 40 mm)
(excluding foot stand)
Weight (with handset)  2.58 lb (1.17 kg)
Phone-casing composition  Polycarbonate acrylonitrile butadiene styrene (ABS) textured plastic; Cosmetic class A
Operational temperature  32 to 104F (0 to 40C)
Nonoperational temperature shock  14 to 140F (-10 to 60C)
Humidity  Operating 10 to 90%, noncondensing

  Nonoperating 10 to 95%, noncondensing

Language support  Arabic (Arabic Area)

  Bulgarian (Bulgaria)

  Catalan (Spain)

  Chinese (China)

  Chinese (Hong Kong)

  Chinese (Taiwan)

  Croatian (Croatia)

  Czech (Czech Republic)

  Danish (Denmark)

  Dutch (Netherlands)

  English (United Kingdom)

  Estonian (Estonia)

  French (France)

  French (Canada)

  Finnish (Finland)

  German (Germany)

  Greek (Greece)

  Hebrew (Israel)

  Hungarian (Hungary)

  Italian (Italy)

  Japanese (Japan)

  Latvian (Latvia)

  Lithuanian (Lithuania)

  Korean (Korea Republic)

  Norwegian (Norway)

  Polish (Poland)

  Portuguese (Portugal)

  Portuguese (Brazil)

  Romanian (Romania)

  Russian (Russian Federation)

  Spanish (Columbia)

  Spanish (Spain)

  Slovak (Slovakia)

  Swedish (Sweden)

  Serbian (Republic of Serbia)

  Serbian (Republic of Montenegro)

  Slovenian (Slovenia)

  Thai (Thailand)

  Turkish (Turkey)



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