Cisco IP Phone 7841 VoIP Phone SIP 4 Lines (CP-7841-K9)

The Cisco IP Phone 7841 VoIP Phone (CP-7841-K9) is a reliable business-class communication device designed for professionals who require clear audio, multiple line support, and efficient call handling. As part of the Cisco 7800 Series, it features a 3.5-inch backlit grayscale display, supports up to four lines, and delivers high-definition voice quality. With Gigabit Ethernet connectivity, advanced security protocols, and flexible deployment options, this IP phone is ideal for modern office environments and enterprise communication systems.

Product Features

Multi-Line Call Handling

Supports up to four programmable lines, allowing users to manage multiple calls efficiently in busy office environments.

High-Quality Audio Performance

Delivers wideband HD audio for handset, headset, and full-duplex speakerphone, ensuring clear voice communication.

Integrated Gigabit Ethernet Switch

Equipped with dual 10/100/1000 Ethernet ports for network and PC connectivity, reducing the need for additional cabling.

User-Friendly Interface

Features a 3.5-inch backlit grayscale display, intuitive navigation key, and dedicated function buttons for quick access to essential features.

Advanced Security Features

Includes AES-128 SRTP media encryption, TLS signaling, 802.1X authentication, and certificate-based security for secure communications.

Flexible Deployment Options

Supports on-premises deployment with Cisco Unified Communications Manager, cloud-based solutions like Webex Calling, and third-party SIP platforms.

Energy Efficient Design

Optimized for low power consumption with support for EnergyWise and IEEE 802.3af PoE.

Product Specifications

• Display: 3.5-inch backlit grayscale LCD (396 x 162 pixels)
• Lines: 4 programmable line and feature keys
• Ethernet Ports: 2 x 10/100/1000 Gigabit Ethernet (LAN and PC)
• Audio: Wideband HD audio, full-duplex speakerphone
• Voice Codecs: G.711, G.722, G.722.2, G.729ab, iLBC, OPUS
• Protocol Support: SIP, CDP, 802.1Q/p (VLAN and QoS)
• Security: SRTP (AES-128), TLS, 802.1X, certificates
• Power Options: IEEE 802.3af PoE (Class 1) or external AC adapter
• Power Consumption: Maximum 3.84W
• Handset Port: RJ-9
• Headset Port: RJ-9 with EHS support via auxiliary port
• Auxiliary Port: For EHS adapters
• Dimensions (H x W x D): 207 x 206 x 28 mm (excluding stand)
• Weight: 1.91 lbs (868 g)
• Operating Temperature: 0°C to 40°C (32°F to 104°F)
• Humidity: 10% to 90% non-condensing
• Mounting Options: Desk (two-position stand) or wall mount
• Casing Material: ABS polycarbonate
• Deployment Support: Cisco Unified Communications Manager, Webex Calling, third-party SIP platforms