Cisco IP Phone 7841 – téléphone VoIP, SIP, SRTP (CP-7841-K9=)

The Cisco IP Business Phone 7841 is a wired VoIP handset designed for medium to large businesses that are migrating from analogue or digital phone systems to an IP communications platform. It features a 3.5-inch greyscale display with 396 x 162 pixel resolution, supports up to four lines, and includes digital volume control. The device is powered via Class 1 Power over Ethernet (PoE) and supports common voice codecs such as G.711a, G.722, G.729A, G.729B and iLBC. The Cisco 7841 also includes caller ID, an integrated answering machine and speakerphone, and is covered by a one-year limited hardware warranty.

Advantages

The Cisco 7841 provides high-fidelity voice communications and clear on-screen information with a compact greyscale display. Its support for multiple codecs ensures compatibility with a variety of VoIP environments while PoE simplifies installation by eliminating the need for a separate power adapter. Built-in speakerphone, caller ID and answering machine features increase usability for everyday office tasks.

Suitable for

• Office workers in medium to large companies
• Reception and shared-desk environments
• Departments upgrading from analogue or digital PBX to IP telephony
• Environments requiring reliable wired desk phones with PoE

Key specifications

• Display: 3.5-inch greyscale, 396 x 162 pixels
• Lines supported: Up to 4
• Power: Class 1 Power over Ethernet (PoE)
• Supported codecs: G.711a, G.722, G.729A, G.729B, iLBC
• Features: Caller ID, answering machine, speakerphone
• Colour: Black, Silver
• Weight: 0.868 kg
• Warranty: 1-year limited hardware warranty

How to use

Connect the Cisco 7841 to your PoE-enabled network switch using a standard Ethernet cable. Configure the phone via your IP telephony platform or SIP server according to the manufacturer’s provisioning instructions. Use the display and navigation keys to manage up to four lines, adjust volume with the digital controls, and operate built-in features such as the speakerphone, caller ID and on-unit answering machine.

Recommendations

For optimal performance, deploy the Cisco 7841 on a managed network with QoS configured for voice traffic and keep firmware up to date. Use PoE-capable switches to ensure stable power delivery and follow your organization’s SIP or call manager provisioning guidelines.