Cisco Intergrated Services router ISR4321-V/K9 Voice Bundle is design to deliver advanced VOIP services to the small enterprise branch environment. Cisco ISR 4321 integrates 2 dual mode Gigabit Ethernet ports and PVDM4 DSP for voice and video services, two network modules, one integrated services card slot, 4GB DDR3 Dream and 4 GB flash memory.Cisco ISR4321 delivers 50Mbps thoughtput by default, with pay-as-you-grow performance, you can increase forwarding capacity to 100Mbps when needed, so the platform performance growth with your business, you only pay for the performance you need. According to security, ISR4321 support most advanced encryption - IPsec, SSL VPN and flex VPN.