Hacking Exposed VoIP: Voice Over IP Security Secrets & Solutions

Cisco's Solution Reference Network Design (SRND) Document for Voice Security

Cisco maintains a set of best practices collected in a Solution Reference Network Design (SRND) document that provides guidelines for deployment and installation of Unified CallManager. In this document, Cisco devotes an entire chapter to voice security and covers some mitigation techniques to many of the attacks we've outlined so far in the book (http://www.cisco.com/en/US/products/sw/voicesw/ps556/products_implementation_design_guide_chapter09186a008063742b.html or http://tinyurl.com/gd5r4). This link is a must read for anyone about to deploy a Cisco VoIP deployment.