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Product Details


Cisco CP-7821-K9 IP Phone

Original price was: $255.00.Current price is: $91.00.

Model: CP-7821-K9 Cisco UC Phone 7821
Detail: Cisco IP Phone 7821

Datasheet: CP-7821-K9 Datasheet


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The cisco cp-7821-k9 IP phone combines an attractive new ergonomic design with secure and reliable encrypted communication. The phone provides advanced IP phone features and clear broadband audio performance, providing a fully functional and easy-to-use voice communication experience. The line keys are fully programmable. You can configure buttons to support lines (such as directory numbers) or calling functions (such as speed dialing).

You can also increase your work efficiency by using the multiple calls feature displayed on each line to handle multiple calls for each directory number. The tri-color LED on the line key supports this function, making the phone easier to use. Fixed function keys give you one-click access to services, messages, directories, hold/resume, transfer and conference functions. Full-duplex speakers allow you to establish clear multi-party meetings and achieve flexible and efficient collaboration.

The cisco cp-7821-k9 IP phone sets a new standard in usability and provides a context-sensitive user experience. Equipped with a high-resolution 3.5-inch (396×162) grayscale display with white backlight for easy reading. Localized language support, including right-to-left screen text, meets the needs of global users. Large and medium-sized enterprises wishing to upgrade their telephone system from a traditional analog or digital system to an IP communication system. It is also a good choice if you want to use the current Cisco Unified Communications solution to expand your voice communication support.

Similar Items

  1. CP-7841-K9
  2. CP-7861-K9

Quick Specs

Table 1 shows the Quick Spec.

Product Code CP-7821-K9
Screen 384 x 106 pixel (3.28 in. / 83.3 mm)
Ethernet Switch 10/100
Programmable Line Keys 2
Full Duplex Speakerphone Yes
Number of Line Keys 2
Wideband Audio Yes
PoE Class 1
Third-party Call Control Yes
Replaceable Bezel Yes
Package Weight 1.7 Kg

Product Details

Before you use the Cisco IP Phone 7821, it should be connected to the corporate IP telephony network.


① AC power wall plug (optional)

② Network port (10/100 SW) connection. IEEE 802.3af power enabled

③ Access port (10/100 PC) connection

④ Auxiliary port (optional)

⑤ Handset connection

⑥ Analog headset connection (optional)


① Handset light strip      ② Programmable feature buttons      ③ Phone screen              ④ Softkey buttons      ⑤ Navigation and Select button     ⑥ Hold/Resume button

⑦ Conference button      ⑧ Transfer button                                  ⑨ Speakerphone button⑩ Headset button      ⑪ Mute button                                    ⑫ Keypad

⑬ Volume button             ⑭ Contacts button                                 ⑮ Applications button     ⑯ Messages button   ⑰ Handset

Compare to Similar Items

Table 2 shows the comparison of Cisco IP Phone 7811, 7821, 7841 and 7861.

Model CP-7811-K9 CP-7821-K9 CP-41-K9 CP-7861-K9
Ethernet switch 10/100 10/100 10/100/1000 10/100
Programable line keys 0 2 4 16
Number of Line Keys 0 2 4 16
Full duplex speakerphone Yes (narrowband) Yes Yes Yes
PoE Class 1 1 1 1
Third-party call control Planned Yes Yes Yes
Replaceable bezel N/A Yes Yes Yes


How to use this product to build Network for Small Business (Requires Router & Voice Module)?

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Cisco CP-7821-K9 Specification

Cisco CP-7821-K9 Specifications

Signaling protocol support ●  Session Initiation Protocol (SIP)
Codec support ●  G.711a/μ, G.722, G.729a, iLBC
Key call features support ●  + Dialing (E.164)

●  Abbreviated dial

●  Adjustable ringing and volume levels

●  Adjustable display contrast

●  Agent greeting

●  Auto-answer

●  Auto-detection of headset (Not available on the IP Phone 7811)

●  Busy Lamp Field (BLF) (Not available on the IP Phone 7811)

●  Call back

●  Call forward

●  Call history

●  Call park

●  Call Pickup

●  Call timer

●  Call waiting

●  Caller ID

●  cBarge

●  Corporate directory

●  Conference

●  Cross Cluster Extension Mobility (EMCC)

●  Dial from the list

●  Direct transfer

●  Do not disturb

●  Extension Mobility (EM)

●  Forced access codes and client matter codes

●  Group call pickup

●  Hold/resume

●  Immediate divert

●  Intercom (Not available on the IP Phone 7811)

●  Join (Not available on the IP Phone 7811)

●  Message-waiting indicator

●  Meet me conference

●  Mobility

●  Music on hold

●  Mute

●  Network profiles (automatic)

●  On- and off-network distinctive ringing

●  Personal directory

●  Privacy

●  Private Line Automated Ringdown (PLAR)

●  Redial

●  Ring tone per line appearance

●  Shared line

●  Silent monitoring and recording

●  Speed dial

●  Time and date display

●  Transfer

●  Voicemail

●  Whisper coaching

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)

●  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)

Multiple ring tones ●  The phone supports user-adjustable ring tones.
Directories ●  The phone identifies incoming messages and categorizes them for users on the screen.

This makes it fast and easy to return calls using direct dial-back capability. The corporate

directory integrates with the Lightweight Directory Access Protocol (LDAP) standard directory.

Quality-of-service (QoS) options ●  The phone supports CDP 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.

Security ●  Certificates

●  Image authentication

●  Device authentication

●  File authentication

●  Signaling authentication

●  Media encryption using Secure Real-Time Transfer Protocol (SRTP) using AES-128

●  Signaling encryption using Transport Layer Security (TLS) Protocol using AES-128 or AES-256

●  Encrypted configuration files

●  802.1X authentication

●  Cryptography

Configuration options ●  The user can configure IP address assignment statically or through the DHCP client.
Physical dimensions (H×W×D) ●  IP Phone 7821: 207 x 206 x 28mm (exclude foot stand)
Weight ●  IP Phone 7821: 867g
Display ●  IP Phone 7821: 3.5” 396×162 pixels
Ethernet switch ●  The phone has a 10/100BASE-T or a 10/100/1000BASE-T
Phone casing composition ●  Polycarbonate acrylonitrile butadiene styrene (ABS) textured plastic.
Power requirements ●  The phone is an interoperable IEEE 802.3af PoE (Class 1 device); 48 VDC is required;

it can be supplied locally at the desktop using an optional AC-to-DC power supply (CP-PWR-CUBE-3=).

Use of the power supply also requires the use of one of the corresponding AC country cords.

Operational temperature ●  32 to 104°F (0 to 40°C)
Nonoperational temperature shock ●  14 to 140°F (-10 to 60°C)
Humidity ●  Operating 10% to 90%, non-condensing

●  Non-operating 10% to 95%, non-condensing

Cosmetic ●  Cisco cosmetic class A
Certification and compliance ●  Regulatory Compliance

◦   CE Markings per directives 2004/108/EC and 2006/95/EC

●  Safety

◦   UL 60950 Second Edition

◦   CAN/CSA-C22.2 No. 60950 Second Edition

◦   EN 60950 Second Edition (including A11 & A12)

◦   IEC 60950 Second Edition (including A11 & A12)

◦   AS/NZS 60950

◦   GB4943

●  EMC – Emissions

◦   47CFR Part 15 (CFR 47) Class B

◦   AS/NZS CISPR22 Class B

◦   CISPR22: 2005 w/Amendment 1: 2005 Class B

◦   EN55022: 2006 w/Amendment 1: 2007 Class B

◦   ICES003 Class B

◦   VCCI Class B

◦   EN61000-3-2

◦   EN61000-3-3

◦   KN22 Class B

●  EMC – Immunity

◦   EN55024

◦   CISPR24

◦   EN60601-1-2

◦   KN24

◦   Armadillo Light

●  Telecom

◦   FCC Part 68 HAC

◦   CS-03-HAC

◦   AS/ACIF S004

◦   AS/ACIF S040

◦   NZ PTC 220

◦   Industry Standards: TIA 810 and TIA 920

◦   Industry Standards: IEEE 802.3 Ethernet, IEEE 802.3af and 802.3at