Cisco ISR4331 Voice Bundle Router with 3GE, 2NIM, 1SM, 4G Flash, 4G DRAM

The Cisco ISR4331-V/K9 is a voice-ready branch router that brings reliable connectivity, security, and room to grow into a single chassis. It gives an office or call center the flexibility to handle both data and voice traffic without adding separate equipment.

Three built-in Gigabit Ethernet ports connect wired devices or upstream links, while two SFP slots let you run fiber where copper is not practical. A multi-core CPU and an architecture that supports a sustained system throughput of 100 to 300 Mbps ensure that critical applications and calls stay responsive even during busy periods.

Cisco has included its security and performance services at the hardware level. Integrated features such as IOS XE Security, Wide Area Application Services, Intelligent WAN, OnePK, and Application Visibility and Control work together to protect traffic, speed up cloud access, and give administrators deep insight into how bandwidth is used.

The router ships with 4 GB of Flash storage and 4 GB of DRAM, which is enough headroom for IOS XE images, call processing files, and logging. One service module slot stands ready for future expansion such as additional voice interfaces or specialized network services, helping the appliance adapt as requirements evolve.

This platform fits well in small to midsize enterprises, customer service departments, or remote sites that need dependable voice capability alongside data routing. It can anchor a new deployment or replace aging branch equipment while keeping the door open for new Cisco services.

Highlights:

• System throughput from 100 Mbps to 300 Mbps
• Three Gigabit Ethernet WAN or LAN ports
• Two SFP fiber ports for flexible uplinks
• Multi-core CPU for concurrent voice and data processing
• One service module slot for future expansion
• Integrated security, WAAS, Intelligent WAN, OnePK, and AVC
• 4 GB Flash storage and 4 GB DRAM included
• Voice features delivered in a single, branch-ready chassis