Overview of Cisco 3905 Unified SIP Phone (CP-3905) | New

The Cisco 3905 Unified SIP Phone (CP-3905) is a basic, affordable multiplatform SIP phone that is ideal for shared workspaces, entry-level business users and receptionists who require dependable single-line voice communication. This little desk phone is perfect for settings where simplicity is valued above sophistication because it provides all the necessary calling functions—dialing, call waiting, transfer and conference—without a display or complicated menus. It is a plug-and-play option for tiny offices, retail counters and temporary settings because of its single 10/100 Ethernet connector and support for SIP platforms including Cisco Webex Calling, Asterisk and third-party PBXs. With a straightforward design that includes four context-sensitive soft buttons, a four-way navigation pad and a high-quality handset for crystal-clear voice calls, the Cisco 3905 SIP Phone stresses affordability and usability. It fits easily into cost-conscious deployments without taxing network infrastructure because it supports Power over Ethernet (PoE) Class 1 for minimal power demand or an optional CP-PWR-3905 power adapter. While basic XML services enable straightforward directory or quick-dial button creation using ITSP or PBX admin tools, wideband audio codecs such as G.711 and G.729 guarantee good call quality over standard business internet connections. The 3905 provides dependable Cisco dependability in the most straightforward and affordable form for enterprises standardizing on Cisco endpoints across various SIP settings.

Key Features of Cisco 3905 Unified SIP Phone

• Single line/single call appearance with support for basic SIP call functions like hold, transfer, conference and redial.

• Four soft keys and four‑way navigation cluster for intuitive access to call history, directories and settings without a screen.

• Wideband audio support (G.711 µ/A‑law, G.729a/ab) delivering clear voice quality for standard business calls.

• 10/100 Ethernet switch port to connect a PC through the phone, reducing cabling needs in desk setups.

• PoE Class 1 powered (IEEE 802.3af, ~4W max) or optional CP‑PWR‑3905 AC adapter for flexible power options.

• Wall‑mountable design with dual‑position footstand for flexible placement on desks, counters or reception areas.

• Headset port (RJ‑9) and electronic hook switch (EHS) support for compatible wireless headsets.

• Multiplatform SIP firmware compatible with Cisco Webex Calling, 3rd‑party SIP servers and cloud PBX platforms.
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Benefits of Cisco 3905 Unified SIP Phone

Specifications for Cisco 3905 Unified SIP Phone (CP-3905) | New