Here are some valuable resources to help you migrate legacy phone systems to Cisco Unified Communications:
> Solution Reference Network Design (SRND) Guides for Cisco Unified Communications
> Cisco Unified Communications Compatibility Matrix
> Supported Cisco Unified Communications Manager Releases by Server
Note: Check SRND Guides for gateway protocol selection, sizing, and more.
> Cisco Interoperability Portal
Helps you interoperate your current architecture and applications with Cisco Unified Communications. Learn how to configure Cisco with third party voice products, and which features interoperate.
