Cisco ISR 3900

The Cisco ISR 3900 Series business phone systems provide the industry leading SMB standalone or enterprise branch office IP telecommunications solution for organizations with 250-450 users. The 3900 series offers the same advanced features such as premium voice, video, mobility, call control, instant messaging, and conferencing that are standard on Cisco’s larger IP phone systems. Built on years of innovation by Cisco the world leader in IP telephony, the new 3900 generation of Cisco ISR’s continue to optimize service integration to transform the SMB business phone system experience with the speed, scale, and flexibility to deliver tomorrow’s services today at the lowest total cost of ownership.

Cisco ISR 3900 – Business Phone Systems for SMB


Capacity: Optimized for 250-450 users
Number of devices supported: Optimized for up to 450 devices
Call control: Includes telephone call processing, caller ID, call transfer, hold, conference, hunt groups, and more
Voice messaging: Includes voicemail powered by Cisco Unity Express
Mobility: Receive important calls wherever you are with single number reach
Automated Attendant: Serve customers faster by routing calls directly to the right department or individual
Simplified Deployment: Day-one device support provides immediate manageability support for the Integrated Services Router, enabling quick and easy deployment, monitoring, and troubleshooting from Cisco and third-party business phone systems applications
Phones: A wide range of Cisco IP phones for any business environment: Cisco Unified SIP Phone 390 series; Cisco Unified IP Phone 6900, 7800, 7900, 8800, 8900, 9900 series; Cisco Unified IP Conference Station 8831; Cisco IP Communicator PC-based soft phone