Cisco is the worldwide leader in networking for the Internet. Cisco provides the broadest line of solutions for transporting data, voice and video within buildings, across campuses, or around the world. Cisco solutions ensure that networks both public and private operate with maximum performance, security, and flexibility.This Cisco 3825 Upgrade Bundle includes 64-Channel Packet Fax/Voice DSP Module PVDM2-64, Cisco CallManager Express Feature License FL-CCME-168, Cisco IOS Advanced IP Services and 64 MB Flash/256 MB DRAM.