Key Features of Cisco IP Phone 7821

LED Indicators: Dedicated LED notifications for audio path keys, select key, line keys, and message waiting alerts.

User-Friendly Navigation: Four soft keys, two-way navigation with a select key, and a convenient scroll toggle bar for smooth operation.

Multi-Line Support: Two line key buttons to manage multiple calls effectively.

Wideband Audio: Delivers superior sound quality for natural, clear conversations.

Adjustable Design: Dual-position foot stand and wall-mountable option for flexible placement.

Display: Greyscale LCD graphical display with 396 × 162 resolution and white backlight for clear visibility.

Headset Support: RJ9 interface for optional headsets.

Power Efficiency: Supports PoE Class 1, reducing power consumption.

VoIP Protocols: Supports SIP and SRTP for secure and reliable telephony.

Specifications
General Information

Product Name: Cisco IP Phone 7821 (VoIP Phone)

SKU: CP-7821-3PCC-K9

Series: Cisco 7800 Series

Body Material: PC/ABS durable plastic

Type: VoIP Business Phone

Mounting Options: Wall-mountable or tabletop use

Dimensions & Weight

Height: 20.7 cm

Width: 20.6 cm

Depth: 2.8 cm

Weight: 867 g

Display

Type: Monochrome LCD

Size: 3.5″ diagonal

Resolution: 396 × 162 pixels

Backlit: Yes

Supported Languages: Multilingual support including English, German, French, Spanish, Arabic, Russian, Chinese, Japanese, Korean, and many more.

Network & Connectivity

Ethernet Ports: 2 × 10/100 Mbps Ethernet ports (10Base-T/100Base-TX)

Switch: Integrated Ethernet switch

IP Addressing: DHCP and static IP support

Protocols Supported: SIP, SRTP, Cisco Discovery Protocol (CDP)

Network Features: LDAP directory support, VLAN (802.1Q), QoS (802.1p)

Power: IEEE 802.3af Power over Ethernet (PoE), Class 1

Telephony Features

Lines Supported: 2

Call Features: Call hold, call transfer, call forwarding, call waiting, caller ID, voicemail, music on hold

Conference Calls: Supports digital duplex speakerphone for clear multi-party conversations

Programmable Keys: 2 programmable buttons for personalized settings

Menu Operation: Yes (on-screen navigation)

Indicators: Visual indicators for voicemail, headset, and speakerphone

Audio & Voice Codecs

Supported Codecs: G.711a, G.711u, G.722, G.729ab, iLBC

Wideband Audio: Yes (ensures HD voice quality)

Security & Compliance

Encryption: SRTP for secure communications

Authentication: IEEE 802.1X support

Certifications & Standards: CISPR, EN, FCC, UL, VCCI, CSA, and more

Why Choose the Cisco IP Phone 7821?

The Cisco 7821 is designed for knowledge workers and office environments that require dependable, secure, and professional-grade IP telephony at an affordable price point. With multi-line support, wideband audio, and SIP protocol compatibility, it delivers the perfect balance of performance and cost efficiency.

Whether mounted on a wall in a reception area or placed on a desk in an executive office, the Cisco 7821 ensures seamless communication, reduced downtime, and enhanced productivity.

Ideal for: Small to medium-sized businesses, branch offices, customer support teams, and organizations requiring cost-effective enterprise VoIP solutions.