8821- Data Sheet

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Item
Description
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+Dialing
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Application launch pad
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Busy Lamp Field (BLF)
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BLF pickup
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BLF speed dial
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Call forward notification
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Forced authorization and client matter codes
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Intercom
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Mobility
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Silent monitoring and recording
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Speed dial
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Voicemail
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Whisper coaching
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Ring setting – phone active (ring, ring once, beep, flash)
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Predictive search on new call
Buttons
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Power button
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Volume up/down
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Two soft-key buttons to access screen-based applications, features, and functions
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Green key (answer/send/redial) and red key (power/end call)
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Application button
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Mute
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Speakerphone
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Five-way navigation support
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Numeric keypad (0–9, *, &, #)
Codecs
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G.711a, G.711u
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G.729a, G.729ab
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G.722
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Internet Low Bitrate Codec (iLBC) audio-compression codecs
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iSAC
LEDs
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Ring, message waiting, Wi-Fi status, and charging LEDs
Protocol
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Session Initiation Protocol (SIP)
Call control
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Cisco Unified Communications Manager: 9.1(2), 10.5(2), 11.0(1), and later
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Cisco Unified Survivable Remote Site Telephony (SRST): 10.5, 11.0, 11.5, 11.7, and later
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Cisco Unified Communications Manager Express: 10.5, 11.0, 11.5, 11.7 (native support), and later
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Cisco Hosted Collaboration Solution (HCS): 9.x, 10.x, 11.x, and later
Security features
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Certificates
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Image authentication
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Device authentication
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File authentication
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Signaling authentication
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Secure Cisco Unified SRST
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Media encryption using Secure Real-Time Protocol (SRTP)
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Signaling encryption using TLS Protocol
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Certificate Authority Proxy Function (CAPF)
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Simple Certificate Enrollment Protocol support (SCEP) for certificate renewal
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Secure profiles
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Encrypted configuration files
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Cryptography is not enabled by default and may be enabled only through a cryptographically enabled Cisco
Unified Communications Manager