Explore Cisco
How to Buy

Have an account?

  •   Personalized content
  •   Your products and support

Need an account?

Create an account

Cisco Unified SIP Phone 3905

Cisco Unified SIP Phone 3905view expanded image

Move From Analog to Cost-Effective IP Phones

Replace your existing analog and digital phone deployments with affordable, basic VoIP communication endpoints using the Cisco Unified SIP Phone 3905.

Features and Capabilities

Increase Interaction and Flexibility

The Cisco Unified SIP Phone 3905 includes the following features:

  • Single-line IP phone with support for up to two concurrent calls
  • Graphical 128 x 32-pixel monochrome display with a two-way navigation button
  • Full duplex speakerphone for flexibility with hands-free communications
  • Fixed keys for common telephony features: hold, redial, transfer, and mute
  • Foldable, single-position display stand to simplify wall-mount deployments

Helps Protect the Environment

The design of this phone includes reground and recyclable plastics to deliver a more environmentally responsible solution.

Administration Benefits

Protocols and networking features of the Cisco Unified SIP Phone 3905 include:

  • Support for Session Initiation Protocol (SIP)
  • IEEE 10/100 network and PC ports to save cabling infrastructure costs on collocation

Specifications at a Glance


128 x 32 pixel, monochrome, graphical, non-backlit

Integrated Switch


Number of Line Keys



Yes, Full Duplex

Fixed Feature Keys


IEEE Power over Ethernet Classification

Class 1

Boost Team Performance

Increase the value of IT investments with Cisco IP Phones. (PDF - 3 MB)

Additional Resources

Contact Cisco

  • 1-800-553-6387
  • US/CAN | 5am-5pm PT