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The Cisco© Wireless IP Phone 8821 is a ruggedized, resilient, and secure 802.11 wireless LAN handset that delivers cost-effective, on-premises, comprehensive Voice over Wireless LAN (VoWLAN) communications for the highly mobile in-campus worker.

The 8821 is specifically designed for workers whose roles are in more rigorous, industrial settings. Examples of ideal use cases include nurses and doctors in healthcare, operations and engineering staff in manufacturing, customer service representatives in retail, service staff such as maids in hospitality, and workers on rigs in the oil and chemical industries.

While the 8821 is sleek and lightweight, the design is hardened for users. It is Ingress Protection standard (IP54) rated and is sealed for protection against dust, splash and water. The device is also MIL-STD-810G tested, with a dozen drops onto concrete from heights of up to 5 feet (1.5 m), to help ensure shock resistance and avoid breakage if dropped.

The 8821 enhances security and simplifies configuration management. Stronger encryption is supported for certificate management and policy enablement with the support of Secure Hash Algorithm 2 (SHA-2). Simple Certificate Enrollment Protocol (SCEP) eases IT administration by enabling automatic certificate management on the device.

End users will enjoy a larger, higher-resolution color display and a user experience that is common with Cisco IP Phone 8800 Series desk phones. In addition, roaming between access points within the campus will support more seamless voice communications with the 8821’s support of Fast Transition (802.11r). This protocol was specifically designed for mobile Voice over IP (VoIP) communications devices within Wi-Fi networks. Bluetooth is supported for the user’s choice of third-party wireless headsets and adds freedom by untethering the user from the handset.

The 8821 supports Cisco and/or third-party XML applications such as push-to-talk.

A full suite of accessories, including desktop chargers, cases, holsters, and multicharger, are available from Cisco to support deployments. Consult the Cisco Wireless IP Phone 882x Series Accessory Guide options and details.


Figure 1.           

Cisco Wireless IP Phone 8821


The Cisco Wireless IP Phone 8821 (Figure 1) is designed for users in rigorous workspaces as well as general office environments. It supports a wide range of features for enhanced voice communications, Quality of Service (QoS), and security. Some of the main benefits and highlights are listed here:

     IEEE 802.11a/b/g/n/ac radio for VoWLAN communications support

     The large 2.4-inch (6 cm) color (240 x 320 pixels) display makes viewing easy

     IP54-rated for protection against dust, splash, and water

     MIL-STD-810G standard for shock resistance

     The phone offers exceptional voice quality with High-Definition (HD) voice

     A built-in full-duplex speakerphone offers high-quality hands-free communications

     The phone supports third-party Bluetooth 3.0 headsets and a 3.5-mm headphone jack for added freedom

     The Applications key provides direct access to XML applications such as push-to-talk and Lone Worker

     Battery life delivers up to 11.5 hours of talk time

     Enhanced encryption support for SHA-1 and SHA-2 signatures

     Fast, secure roaming using 802.11r and Cisco Centralized Key Management roaming

     Automatic certificate renewal – SCEP support

Table 1 provides a list of the phone’s features, Table 2 summarizes the wireless characteristics, Table 3 lists specifications, and Table 4 provides certification and compliance information.

Table 1.             Features




  Six line appearances
  Abbreviated dialing
  Adjustable ringing and volume levels
  Adjustable display brightness and timeout
  Audible and vibrating ringers
  Auto-detection of headset and auto-answer from headset
  Automatic keypad lock
  Call forward
  Call history lists
  Call park
  Call pickup
  Call timer
  Call waiting
  Caller ID
  Corporate directory
  Direct transfer
  Extension mobility service
  Fast-dial service
  Group call pickup
  Hotkey for keypad lock, ring silent mode, and voicemail access
  Immediate divert
  Last-number redial – green key
  Malicious caller
  Message-waiting indicator
  Meet-me conference
  Multilevel precedence and preemption (MLPP)
  Music on hold
  Network profiles (4)
  Personal directory
  Predialing before sending
  Quality Report Tool (QRT)
  Ring tone per line appearance
  Service URL
  Shared line
  Time and date display
  Network hold
  Support for mutual-authentication Transport Layer Security (TLS)
  Cisco Unified Communications Manager WLAN profiles
  Application launch pad
  Busy Lamp Field (BLF)
  BLF pickup
  BLF speed dial
  Call forward notification
  Forced authorization and client matter codes
  Silent monitoring and recording
  Speed dial
  Whisper coaching
  Ring setting – phone active (ring, ring once, beep, flash)
  Predictive search on new call


  Power button
  Volume up/down
  Two soft-key buttons to access screen-based applications, features, and functions
  Green key (answer/send/redial) and red key (power/end call)
  Application button
  Five-way navigation support
  Numeric keypad (0–9, *, &, #)


  G.711a, G.711u
  G.729a, G.729ab
  Internet Low Bitrate Codec (iLBC) audio-compression codecs


  Ring, message waiting, Wi-Fi status, and charging LEDs


  Session Initiation Protocol (SIP)

Call control

  Cisco Unified Communications Manager: 9.1(2), 10.5(2), 11.0(1), and later
  Cisco Unified Survivable Remote Site Telephony (SRST): 10.5, 11.0, 11.5, 11.7, and later
  Cisco Unified Communications Manager Express: 10.5, 11.0, 11.5, 11.7 (native support), and later
  Cisco Hosted Collaboration Solution (HCS): 9.x, 10.x, 11.x, and later

Security features

  Image authentication
  Device authentication
  File authentication
  Signaling authentication
  Secure Cisco Unified SRST
  Media encryption using Secure Real-Time Protocol (SRTP)
  Signaling encryption using TLS Protocol
  Certificate Authority Proxy Function (CAPF)
  Simple Certificate Enrollment Protocol support (SCEP) for certificate renewal
  Secure profiles
  Encrypted configuration files
  Cryptography is not enabled by default and may be enabled only through a cryptographically enabled Cisco Unified Communications Manager

Provisioning and management

  Configuration via Cisco Unified Communications Manager, SRST, and Unified Communications Manager Express administration interfaces
  Bulk provisioning support via desktop charger and USB to Ethernet dongle combination
  Web server for configuration and statistics
  Capability to disable local phone settings
  QoS reporting: Jitter, delay, dropped packets, and latency on a per-call basis
  Real Time Control Protocol (RTCP) support and monitoring

Configuration options

  Dynamic Host Configuration Protocol (DHCP) client or static configuration
  Support for online firmware upgrades using Trivial File Transfer Protocol (TFTP)
  Domain Name System (DNS)

Application framework

  XML (support push-to-talk, paging, and other 3 rd party applications)

User localization

Arabic, Bulgarian, Catalan, Chinese (Hong Kong), Chinese (China), Chinese (Taiwan), Croatian, Czech, Danish, Dutch, English (United Kingdom), English (United States), Estonian, Finnish, French (Canada), French (France), German, Greek, Hebrew, Hungarian, Italian, Japanese, Korean, Latvian, Lithuanian, Norwegian, Polish, Portuguese (Brazil), Portuguese (Portugal), Romanian, Russian, Serbian, Slovak, Slovenian, Spanish (Spain), Spanish (Colombia), Swedish, Thai, and Turkish

Network localization

Argentina, Australia, Austria, Belgium, Brazil, Canada, China, Colombia, Cyprus, Czech Republic, Denmark, Egypt, Finland, France, Germany, Ghana, Greece, Hong Kong, Hungary, Iceland, India, Indonesia, Ireland, Israel, Italy, Japan, Jordan, Kenya, Korea Republic, Lebanon, Luxembourg, Malaysia, Mexico, Nepal, Netherlands, New Zealand, Nigeria, Norway, Pakistan, Panama, Peru, Philippines, Poland, Portugal, Russian Federation, Saudi Arabia, Singapore, Slovakia, Slovenia, South Africa, Spain, Sweden, Switzerland, Taiwan, Thailand, Turkey, United Kingdom, United States, Venezuela, and Zimbabwe

Table 2.             Wireless characteristics




  IEEE 802.11a, 802.11b, 802.11g, 802.11n, 802.11ac

Frequency bands and operating channels

  2.412 to 2.472 GHz (channels 1 to 13)
  5.180 to 5.240 GHz (channels 36 to 48)
  5.260 to 5.320 GHz (channels 52 to 64)
  5.500 to 5.700 GHz (channels 100 to 140)
  5.745 to 5.825 GHz (channels 149 to 165)
  IEEE 802.11d can be used to identify available channels

Nonoverlapping channels

  2.4 GHz (20-MHz channels): up to 3 channels
  5 GHz (20-MHz channels): up to 24 channels
  5 GHz (40-MHz channels): up to 9 channels
  5 GHz (80-MHz channels): up to 4 channels

Operating modes

  Auto (preference to 5 GHz)
  2.4 GHz only
  5 GHz only

Data rates

  802.11a: 6, 9, 12, 18, 24, 36, 48, and 54 Mbps
  802.11b: 1, 2, 5.5, and 11 Mbps
  802.11g: 6, 9, 12, 18, 24, 36, 48, and 54 Mbps
  802.11n: HT MCS 0, MCS 1, MCS 2, MCS 3, MCS 4, MCS 5, MCS 6, and MCS 7
  802.11ac: VHT MCS 0, MCS 1, MCS 2, MCS 3, MCS 4, MCS 5, MCS 6, MCS 7, MCS 8, and MCS 9
(MCS 9 available with VHT40 and VHT80 only)

2.4-GHz receiver sensitivity

IEEE 802.11b:

  1 Mbps: -98 dBm
  2 Mbps: -96 dBm
  5.5 Mbps: -93 dBm
  11 Mbps: -91 dBm

IEEE 802.11g:

  6 Mbps: -95 dBm
  9 Mbps: -94 dBm
  12 Mbps: -93 dBm
  18 Mbps: -90 dBm
  24 Mbps: -87 dBm
  36 Mbps: -84 dBm
  48 Mbps: -79 dBm
  54 Mbps: -77 dBm

IEEE 802.11n HT20:

  MCS 0: -95 dBm
  MCS 1: -92 dBm
  MCS 2: -90 dBm
  MCS 3: -87 dBm
  MCS 4: -83 dBm
  MCS 5: -78 dBm
  MCS 6: -77 dBm
  MCS 7: -75 dBm

5-GHz receiver sensitivity

IEEE 802.11a:

  6 Mbps: -94 dBm
  9 Mbps: -93 dBm
  12 Mbps: -92 dBm
  18 Mbps: -89 dBm
  24 Mbps: -86 dBm
  36 Mbps: -83 dBm
  48 Mbps: -78 dBm
  54 Mbps: -76 dBm

IEEE 802.11n HT20:

  MCS 0: -94 dBm
  MCS 1: -91 dBm
  MCS 2: -89 dBm
  MCS 3: -86 dBm
  MCS 4: -82 dBm
  MCS 5: -77 dBm
  MCS 6: -76 dBm
  MCS 7: -74 dBm

IEEE 802.11n HT40:

  MCS 0: -91 dBm
  MCS 1: -88 dBm
  MCS 2: -86 dBm
  MCS 3: -83 dBm
  MCS 4: -79 dBm
  MCS 5: -75 dBm
  MCS 6: -73 dBm
  MCS 7: -72 dBm


IEEE 802.11ac VHT20:

  MCS 0: -93 dBm
  MCS 1: -90 dBm
  MCS 2: -87 dBm
  MCS 3: -84 dBm
  MCS 4: -81 dBm
  MCS 5: -76 dBm
  MCS 6: -75 dBm
  MCS 7: -74 dBm
  MCS 8: -70 dBm

IEEE 802.11ac VHT40:

  MCS 0: -90 dBm
  MCS 1: -87 dBm
  MCS 2: -85 dBm
  MCS 3: -82 dBm
  MCS 4: -79 dBm
  MCS 5: -73 dBm
  MCS 6: -72 dBm
  MCS 7: -72 dBm
  MCS 8: -67 dBm
  MCS 9: -66 dBm

IEEE 802.11ac VHT80:

  MCS 0: -87 dBm
  MCS 1: -83 dBm
  MCS 2: -81 dBm
  MCS 3: -78 dBm
  MCS 4: -75 dBm
  MCS 5: -73 dBm
  MCS 6: -68 dBm
  MCS 7: -68 dBm
  MCS 8: -64 dBm
  MCS 9: -62 dBm

Transmitter output power

2.4 GHz:

  802.11b: up to 17 dBm
  802.11g: up to 14 dBm
  802.11n HT20: up to 13 dBm

5 GHz:

  802.11a: up to 14 dBm
  802.11n HT20: up to 13 dBm
  802.11n HT40: up to 13 dBm
  802.11ac VHT20: up to 12 dBm
  802.11ac VHT40: up to 12 dBm
  802.11ac VHT80: up to 12 dBm


  2.4 GHz: 2.4 dBi peak gain
  5 GHz: 3.0 dBi peak gain

Access point support

  Cisco unified access points
  Cisco autonomous access points
   Minimum: 12.4(21a)JY
  Cisco Meraki ® access points
Note: Check deployment guide for more details around access point support and listing.

Wireless security


  Wi-Fi Protected Access (WPA) versions 1 and 2 Personal and Enterprise
  Extensible Authentication Protocol – Flexible Authentication via Secure Tunneling (EAP-FAST)
  Protected Extensible Authentication Protocol – Generic Token Card (PEAP-GTC)
  Protected Extensible Authentication Protocol – Microsoft Challenge Handshake Authentication Protocol Version 2 (PEAP-MSCHAPv2)
  Extensible Authentication Protocol – Transport Layer Security (EAP-TLS)


  40-bit and 128-bit static Wired Equivalent Privacy (WEP)
  Temporal Key Integrity Protocol (TKIP) and Message Integrity Check (MIC)
  Advanced Encryption Standard (AES)

Note: The access point must support AES as TKIP can only be used as the broadcast/multicast cipher.

Fast, secure roaming

  802.11r (FT)
  Cisco Centralized Key Management (CCKM)

Signature types

  Secure Hash Algorithm 1 (SHA-1) and Secure Hash Algorithm 2 (SHA-2)

Bit key types

  1024, 2048, and 4096 bit keys


  IEEE 802.11e and Wi-Fi Multimedia (WMM)
  Traffic Specification (TSPEC)
  Traffic Classification (TCLAS)
  Enhanced Distributed Channel Access (EDCA)
  QoS Basic Service Set (QBSS)

Table 3.             Specifications




  2.4-in. (6-cm) color display with 240 x 320 pixel resolution

Dimensions (HxWxD)

  5.2 x 2.2 x 0.7 in. (13.2 x 5.6 x 1.7 cm)


  Device 4.4 oz (126 g), battery 1.3 oz (37 g), total = 5.7 oz (163 g)


  Rechargeable Lithium ion 4.35V, 2060mAh smart battery (minimal capacity 3.8V, 2000mAh)
  For battery life information refer to the Battery Performance section later in this document

Input power

  Phone: 100 to 240 VAC, ~0.2A, and 50 to 60 Hz
  AC adapters (by geographical region)

Operating temperature

  Device: 14° to 122°F (-10° to 50°C)
  Battery: -4° to 140°F (-20° to 60°C)

Storage temperature

  Device: -22° to 140°F (-30° to 60°C)
  Battery: -4° to 113°F (-20° to 45°C)

Relative humidity

  10% to 95% (noncondensing)


  1.5 Grms maximum, 0.1 in. (2.5 mm) double amplitude at 0.887 octaves per minute from 5-500-5 Hz sweep, and 10-minute dwell on three major peaks in each of the three major mutually perpendicular axes

Thermal shock

  -22°F (-30°C) 1 hour; 158°F (70°C) 1 hour


  Certified for operation: 0 to 6500 ft (0 to 2 km)


  Ingress Protection Standard IP54
  MIL-STD-810G Drop and Vibration procedures

Drop specs

  Withstand multiple drops of 5 feet (1.5 m) onto concrete. 12 drops (6 faces, 4 edges, face, and bottom)


  Wireless: Bluetooth SW 3.0 HW 4.0
  Wired: 3.5 mm stereo headphone/microphone jack


  Magnetic USB 2.0 On The Go (OTG) connector

Table 4.             Certification and compliance




  UL 60950-1
  CAN/CSA 60950-1
  EN 60950-1
  IEC 60950-1
  AS/NZS 60950.1
  IEC 60529 (IP 54)

Electromagnetic Compatibility and Electromagnetic Interference (EMC/EMI)

  47 CFR Part 15 Class B
  ICES-003 Class B
  EN 55022 Class B
  AS/NZS CISPR 22 Class B
  CISPR 22 Class B
  VCCI Class B
  EN 61000-3-2
  EN 61000-3-3
  KN 22 Class B
  EN 55024
  EN 50082-1
  EN 61000-6-1
  EN 61000-6-3
  EN 300 386
  EN 60601-1-2
  KN Immunity Series


  FCC Part 68 (CFR) (HAC)
  NZ PTC 220 DR
  AS/ACIF S004 and AS/ACIF S040 (Australia)
  TIA 810-B and TIA 920-A


  USA: FCC Part 15.247 (2.4 GHz), FCC Part 15.407 (5 GHz), and FCC Part 2
  Canada: RSS-210
  Japan: ARIB STD-T66 (2.4 GHz), ARIB STD-T70, and T71 (4.9/5 GHz)
  ETSI: EN 300.328 (2.4 GHz) and EN 301.893 (5 GHz)
  Australia and New Zealand: AS/NZS 4268
  Singapore: IDA TS SRD
  Hong Kong: HKTA1039

RF Exposure

  OET-65C (01-01)
  ANSI C95.1 (91)
  ACA Radio Communications (Electromagnetic Radiation – Human Exposure) Standard 2003
  EN 50360
  EN 301 489-1
  EN 301 489-17


SKU CP-8821-K9
Barcode # 882658958311
Brand Cisco
Shipping Weight 0.3300kg
Shipping Width 0.200m
Shipping Height 0.070m
Shipping Length 0.214m
Shipping Cubic 0.002996000m3

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