Voice over Internet Protocol (VoIP) Security

Packet Guide to Voice over IP: A system administrator's guide to VoIP techno...

Beyond VoIP Protocols: Understanding Voice Technology and... - Olivier Hersent

Broadband-Voice over Internet Protocol B-VoIP Study Guide Prep Book

Beyond VoIP Protocols: Understanding Voice Technology... by David Gurle Hardback

Networking by Jeffrey S. Beasley (2004) 0-13-098659-3

Hacking Exposed VoIP : Voice over IP Security Secrets and Solution 2007 PB

VoIP Security, Paperback by Ransome, James F.; Rittinghouse, John W., Ph.D., ...