Signaling protocol support

● Session Initiation Protocol (SIP)

Codec support

● G.711a/μ, G.722, G.729a, iLBC

Key call features support

● + 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

Language support

● Arabic (Arabic Area)

● Bulgarian (Bulgaria)

● Catalan (Spain)

● Chinese (China)

● Chinese (Hong Kong)

● Chinese (Taiwan)

● Croatian (Croatia)

● Czech (Czech Republic)

● Danish (Denmark)

● Dutch (Netherlands)

● English (United Kingdom)

● Estonian (Estonia)

● French (France)

● Finnish (Finland)

● German (Germany)

● Greek (Greece)

● Hebrew (Israel)

● Hungarian (Hungary)

● Italian (Italy)

● Japanese (Japan)

● Latvian (Latvia)

● Lithuanian (Lithuania)

● Korean (Korea Republic)

● Norwegian (Norway)

● Polish (Poland)

● Portuguese (Portugal)

● Portuguese (Brazil)

● Romanian (Romania)

● Russian (Russian Federation)

● Spanish (Columbia)

● Spanish (Spain)

● Slovak (Slovakia)

● Swedish (Sweden)

● Serbian (Republic of Serbia)

● Serbian (Republic of Montenegro)

● Slovenian (Slovenia)

● Thai (Thailand)

● Turkish (Turkey)

Multiple ring tones

● The phone supports user-adjustable ring tones.

Directories

● The phone identifies incoming messages and categorizes them for users on the screen. This makes it fast and easy to return calls using direct dial-back capability. The corporate directory integrates with the Lightweight Directory Access Protocol (LDAP) standard directory.

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

● 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

Configuration options

● The user can configure IP address assignment statically or through the DHCP client.

Physical dimensions (H×W×D)

● IP Phone 7821: 207 x 206 x 28mm (exclude foot stand)

Weight

● IP Phone 7821: 867g

Display

● IP Phone 7821: 3.5” 396×162 pixels

Ethernet switch

● The phone has a 10/100BASE-T or a 10/100/1000BASE-T

Phone casing composition

● Polycarbonate acrylonitrile butadiene styrene (ABS) textured plastic.

Power requirements

● The phone is an interoperable IEEE 802.3af PoE (Class 1 device); 48 VDC is required; it can be supplied locally at the desktop using an optional AC-to-DC power supply (CP-PWR-CUBE-3=). Use of the power supply also requires the use of one of the corresponding AC country cords.

Operational temperature

● 32 to 104°F (0 to 40°C)

Nonoperational temperature shock

● 14 to 140°F (-10 to 60°C)

Humidity

● Operating 10% to 90%, non-condensing

● Operating 10% to 90%, non-condensing

Cosmetic

● Cisco cosmetic class A

Certification and compliance

● Regulatory Compliance

◦ CE Markings per directives 2004/108/EC and 2006/95/EC

● Safety

◦ UL 60950 Second Edition

◦ CAN/CSA-C22.2 No. 60950 Second Edition

◦ EN 60950 Second Edition (including A11 & A12)

◦ IEC 60950 Second Edition (including A11 & A12)

◦ AS/NZS 60950

◦ GB4943

● EMC - Emissions

◦ 47CFR Part 15 (CFR 47) Class B

◦ AS/NZS CISPR22 Class B

◦ CISPR22: 2005 w/Amendment 1: 2005 Class B

◦ EN55022: 2006 w/Amendment 1: 2007 Class B

◦ ICES003 Class B

◦ VCCI Class B

◦ EN61000-3-2

◦ EN61000-3-3

◦ KN22 Class B

● EMC - Immunity

◦ EN55024

◦ CISPR24

◦ EN60601-1-2

◦ KN24

◦ Armadillo Light

● Telecom

◦ FCC Part 68 HAC

◦ CS-03-HAC

◦ AS/ACIF S004

◦ AS/ACIF S040

◦ NZ PTC 220

◦ Industry Standards: TIA 810 and TIA 920

◦ Industry Standards: IEEE 802.3 Ethernet, IEEE 802.3af and 802.3at