The Cisco IP Phone 7821 is designed for small to large businesses. It delivers advanced IP Telephony features and crystal clear wideband audio performance to deliver an easy-to-use, full-featured voice communications experience on Cisco on-premises and hosted infrastructure platforms and third party hosted call control.
Intergral Switch | 10/100 |
Display | 396 x 162 pixel-based, anti-glare |
graphical monochrome display with | |
white backlight | |
Integrated Video | No |
Touch Screen | No |
Speakerphone | Yes |
Number of Line keys | 2 |
Programmable (Soft) keys | 4 |
Handsfree | Yes |
Headset Port | Yes |
Cisco Power | No |
PoE Classification | Class 1 |
DHCP | Yes |
Physical dimensions(H × W × D) in | 8.90 x 8.90 x 2.14 in |
Physical dimensions(H × W × D) mm | (226 x 226 x 54.4 mm |
Net Weight lb | 1.92 |
Net Weight kg | 0.867 |
Display | 396 x 162 pixel-based, anti-glare |
graphical monochrome display with | |
white backlight | |
Integrated Video | No |
Touch Screen | No |
Speakerphone | Yes |
Number of Line keys | 2 |
Programmable (Soft) keys | 4 |
Fixed Feature Keys | 11 |
Advanced Features | Multi-call per-line appearance |
Full Wideband Audio Electronic | |
Hookswitch Support (Through | |
AUX Port); Mobile Remote Access | |
without a VPN client through Cisco | |
Expressway; New cloud registration | |
through Cisco Spark for even faster | |
and cost-effective deployment | |
Handsfree | Yes |
Message Waiting Indication | Yes |
Third Party XML Support | Yes |
Headset Port | Yes |
Signaling Protocal | SIP |
802-3AF | Yes |
Cisco Power | No |
PoE Classification | Class 1 |
DHCP | Yes |
802-1p/q | Yes |
Codecs | G.711a, G.711u, G.729a, G.729b, |
G.729ab, G.722, Internet Low Bitrate | |
Codec (iLBC) and OPUS | |
Supported Cisco Call Control Platform(s) | CUCM: 8.5.1, 8.62, 9.1.2, 10x and |
later | |
Bus. Edition: 8.6.2 | |
HCS: 9.1.2 | |
Cisco Spark: Requires Spark Phone | |
OS 11.0 or later | |
UC Manager Encryption Support (TLS/SRTP) | Yes |
Notes | FIPS 140-2 Level 1: Requires Phone |
OS 11.5 or later | |
PID | CP-7821-K9= (Charcoal); |
CP-7821-W-K9= (White); | |
CP-7821-3PCC-K9= Multiplatform | |
Phone: (Cisco approved Service | |
Providers) | |
Cisco Unified Communications Manager | 8.5.1 |
8.6.2 | |
9.1.2 | |
10.x and later | |
Cisco Unified Communications Manager Express (Unified CME) | 8.5.1 |
8.6.2 | |
9.1.2 | |
10.x and later | |
Cisco Business Edition 6000 (BE 6000) | 8.6.2 |
9.1.2 | |
10.x and later | |
Cisco Hosted Collaboration Solution (HCS) | 8.6.2 and later (using supported UCM versions above) |
Audio codec support | G.711a/μ, G.722, G.729a, Ilbc |
Call features | + 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 | |
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 features | 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 | |
Physical dimensions(H × W × D) | 8.1 x 3.7 x 1.8 in.(205 x 94 x 46 mm) |
Weight (with handset) | Charcoal: Standard: 23.5 oz (655.2g); slimline: 21.9 oz (621.2g) |
Arctic white: Standard: 24.5 oz (695g); slimline: 23.4 oz (662g) | |
Phone-casing composition | Polycarbonate acrylonitrile butadiene styrene (ABS) textured plastic. |
Operational temperature | 23 to 113°F (-5 to 45oC) |
Nonoperational temperature shock | ‘-13 to 158°F (-25 to 70oC) |
Humidity | 95% +/- 5% noncondensing, from 86 to 140°F (30 to 60 oC) |
CP-DX-HS-NB= | Spare Narrowband Handset for Cisco IP Phone 7811 |
CP-DX-HS= | Spare Wideband Handset for Cisco IP Phone 7800 Series |
CP-DX-W-HS= | Spare White Wideband Handset for Cisco IP Phone 7800 Series |
CP-7800-HS-CORD= | Spare Handset Cord for Cisco IP Phone 7800 Series |
CP-DX-W-CORD= | Spare White Handset Cord for Cisco IP Phone 7800 Series |
CP-7800-HS-HOOK= | Spare Handset Hook for Cisco IP Phone 7800 Series, 20 Piece |
CP-7811-WMK= | Spare Wallmount Kit for Cisco IP Phone 7811 |
CP-7800-WMK= | Spare Wallmount Kit for Cisco IP Phone 7800 Series |
CP-7861-WMK= | Spare Wallmount Kit for Cisco IP Phone 7861 |
CP-7811-FS= | Spare Foot stand for Cisco IP Phone 7811 |
CP-7861-FS= | Spare Foot stand for Cisco IP Phone 7861 |
CP-7821-B-BEZEL= | Spare Black Bezel for Cisco IP Phone 7821 |
CP-7821-S-BEZEL= | Spare Silver Bezel for Cisco IP Phone 7821 |
CP-7841-B-BEZEL= | Spare Black Bezel for Cisco IP Phone 7841 |
CP-7841-S-BEZEL= | Spare Silver Bezel for Cisco IP Phone 7841 |
CP-7861-B-BEZEL= | Spare Black Bezel for Cisco IP Phone 7861 |
CP-7861-S-BEZEL= | Spare Silver Bezel for Cisco IP Phone 7861 |
CP-PWR-CUBE-3 | Cisco Power Cube 3 |
CP-PWR-CORD-AP= | Power Cord Asia Pacific |
CP-PWR-CORD-AR= | Power Cord Argentina |
CP-PWR-CORD-AU= | Power Cord Australia |
CP-PWR-CORD-BZ= | Power cord for Brazil |
CP-PWR-CORD-CE= | Power Cord European |
CP-PWR-CORD-CN= | Power Cord China |
CP-PWR-CORD-JP= | Power Cord Japan |
CP-PWR-CORD-NA= | Power Cord North America |
CP-PWR-CORD-SW= | Power Cord Switzerland |
CP-PWR-CORD-UK= | Power Cord United Kingdom |
Delivery Options | Estimated Delivery Time | |
DHL | 2-4 business days | |
Fedex | 2-4 business days | |
TNT | 2-4 business days | |
UPS | 2-4 business days | |
By Air | 4-10 business days | |
By Sea | 10-20 business days |
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