Technical details

Audio features

Codecs: G.711 (A-law and m-law), G.722.2, G.722, G.729ab, ILBC, iSAC, OPUS, Narrowband Opus
DTMF: In-band, out-of-band (RFC 2833), and SIP INFO
Early Media and Preconditions
MOS Score Reporting (Telchemy)
The 7800 series provides exceptional noise isolation when used with a Cisco 500 Series Headset. The analog headset jack is a wideband-capable RJ-9 audio port for the 7821.

Telephony features

Busy Lamp Field (BLF)
Call back on busy
Call blocking – anonymous and selective
Call conferencing
Call forwarding – unconditional, no answer, on busy
Call hold, park and unpark 1
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)
Emergency Call Support
Extension mobility, Hot-Desking, Hoteling, Activity Based Workspace
Group paging
Individual volume setting per audio path (headset, handset and 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
Supplementary services feature activation codes
Voice Message Waiting Indicator (VMWI)
Voice Mail Monitoring via a PLK

Network features

Security features

802.1X authentication
Automatic Secure Call
Configurable Ciphers
Customer Device Activation (CDA: formerly known as EDOS) Certificate Upload and Encryption Hash Selection
Digest authentication
Encrypted configuration files
FIPS 140-2
HTTPs secure provisioning
Mandatory/Optional Secure call
Media encryption via SRTP with AES-128 or AES-256
Password login
Stateful Firewall
TLS v1.2

Cisco applications

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

Cisco 7821