Cisco Unified SIP Phone 3905 VoIP Phone with Ethernet Switch

The Cisco CP-3905= is a SIP based VoIP phone created for workplaces that want dependable voice communication without extra frills. It can sit neatly on a desk or mount on a wall, so it suits cubicles, classrooms, retail counters, and other spaces where every square inch matters and quick access to a phone is critical.

While it supports a single phone line, that line can manage two concurrent calls. Users can place one caller on hold, answer another, then switch between them with a single touch. Fixed keys for redial, transfer, and hold or resume make the most frequent actions fast and intuitive. A full duplex speakerphone lets both parties talk naturally without cutting each other off, which is handy during group discussions or when you need to keep your hands free for typing or note-taking.

The dual-port 10/100 Ethernet switch on the back connects the phone and a nearby computer to the same network drop, reducing cable runs and saving switch ports in crowded wiring closets. Installation is straightforward: connect the network cable, power it up, and let the phone register with your SIP call control platform.

Cisco built the CP-3905= with recyclable materials, so it supports sustainability goals while keeping hardware costs low. It delivers the audio clarity, long service life, and consistent user experience that network administrators expect from Cisco, making it a smart choice for organizations that measure value in reliability and total cost of ownership.

• Single line can handle two calls at the same time
• Full duplex speakerphone for natural, hands-free conversations
• Two-port 10/100 Ethernet switch connects both phone and PC
• Dedicated keys for redial, transfer, hold, and resume
• Housing made with recyclable materials to support sustainability goals