Important
MPP Version - Not compatible with Cisco Unified Communications Manager (CUCM).

Cisco IP Phone 6800 Series deliver reliable, business-grade audio and are ideal for businesses that want to update their phone systems from traditional analog or digital-based systems to an IP communications system with supported multiplatform call control systems. With the 2 SIP lines, the 6821 is the smallest IP phone offered in the 6800 series.

Ergonomic design
An easy-to-use interface that provides a traditional telephony-like user experience.

Graphical display
White backlit, grayscale, 2.5-in. (6.4-cm) 240 x 120-pixel display.

Handset
Supports a narrowband audio handset connected through an RJ-9 port.

Technical details

Full lines supported: 2 lines (SIP registrations)

Audio features

Codecs: G.711 (A-law and m-law), G.722.2, G.722, G.729 (a, b, ab), ILBC, iSAC, OPUS
DTMF: In-band, out-of-band (RFC 2833), and SIP INFO
MOS Score Reporting (Telchemy)
The 6800 series provides exceptional noise isolation when used with a Cisco Headset.
Supports a narrowband audio handset connected through an RJ-9 port.
A full-duplex speakerphone for flexibility in placing and receiving calls
A volume-control toggle for an easy decibel-level adjustments of the handset, monitor speaker, and ringer

Telephony features

Busy Lamp Field (BLF)
Call back on busy
Call blocking – anonymous and selective
Call conferencing – hosted (N-party)
Call conferencing – local 3-way
Call forwarding – unconditional, no answer, on busy
Call hold, park and unpark
Call park monitoring via the BLF list
Call pickup – selective and group
Call transfer – attended or blind
Call waiting
Caller ID mapping for incoming calls
Caller ID name and number and outbound caller ID blocking
Configurable dial plan and numbering plan support with inter-digit timers – per line
Configurable supplementary services soft keys
Distinctive ringing based on calling and called number
Do not disturb
Early Media and Preconditions (Cisco BroadWorks R23 feature support)
Extension mobility, hot-desking, hoteling, Activity Based Workspace
Group paging
Individual volume setting per audio path (headset, handset, or speaker)
Intercom
Multicast paging
Music on hold
Outbound caller ID blocking
PLKs: Other than the primary line assignment on the first line key, the other keys may be configured as user-customizable, or system administrator-customizable PLKs
Shared line and bridged line appearance 1
Supplementary services feature activation codes
Visual Voice Message Waiting Indicator (VMWI)
Voice Mail Monitoring via a PLK

Network features

Cisco Discovery Protocol
DHCP (RFC 2131)
DHCP VLAN Options
DNS: A record (RFC 1706), SRV record (RFC 2782)
Global Discovery Services (GDS)
HTTPs Support for XSI Services
IPv4 (RFC 791)
IPV6 (RFC 2460): System Interoperability Testing Required
LLDP
MAC address (IEEE 802.3)
NAPTR
NAT, (STUN)
Peer Firmware Sharing
SIP protocol support (RFC 3261 and companion RFCs)
SNTP (RFC 2030)
TR.69 provisioning: System Interoperability Testing Required
UDP and TCP
Zero Touch Provisioning

Security features

802.1X authentication
Device authentication
Encrypted configuration files
File authentication
Image authentication
Manufacture-Installed Certificates
Media encryption using SRTP with Advanced Encryption Standard AES-128 or AES-256
Signaling encryption using TLS with AES-128 or AES-256

Size (H x W x D): 207 mm x 171 mm x 37.5 mm (8.2 in x 6.7 in x 1.5 in) (excluding foot stand)

Weight

456 g (16 oz ) (excluding foot stand, handset, and package)
512 g (18 oz) (including foot stand, excluding handset and package)

User interface

White backlit, grayscale, 2.5-in (6.4-cm) 240 x 120-pixel display

The 6821 has the following keys:

Lines
Softkeys
Two-way navigation and select
Service
Standard keypads
Volume control toggle
Speakerphone, headset, and mute

Cisco applications

Cisco Webex Calling
Webex Calling Carrier
Cisco BroadWorks

3rd party applications

Asterisk
Centile
Metaswitch
Ribbon Kandy Business Solutions

Language support: Bulgarian, Catalan, Chinese, Croatian, Czech, Danish, Dutch, English, Finnish, French, Greek, German, Hungarian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese, Russian, Slovak, Swedish, Slovenian, Spanish, Turkish

Power

Supports the following Ethernet cables:

Category 3, 5, 5e, and 6 for 10-Mbps cables with 4 pairs
Category 5, 5e, and 6 for 100-Mbps cables with 4 pairs

Supports IEEE 802.3af PoE (Class 2); power consumption does not exceed 6.49W.
A 10/100BASE-T Ethernet connection through two RJ-45 ports; one for the LAN connection and the other for a downstream Ethernet device connection such as a PC

Compliance