Security Considerations for Voice Over IP Systems (PDF 99P)
This document is published by National Institute of Standards and Technology, this covers the following: Overview of VOIP, VOIP Equipment, Quality of Service Issues, Overview of VOIP Data Handling ,Cost, Privacy and Legal Issues with VOIP, VOIP Security Issues,Speed and Quality, H.323, SIP Gateway Decomposition, Firewalls, Address Translation, and Call Establishment, Encryption and IPsec, Solutions to the VOIPsec Issues, Planning for VOIP Deployment, VOIP Risks, Threats, and Vulnerabilities.
Author(s): D. Richard Kuhn, Thomas J. Walsh, Steffen Fries
99 Pages 
Practical Voice Over IP Lecture notes
This note is to make you understand what Voice over IP (VoIP) systems are, their basic architectures, and the underlying protocols and provides a basis for your own research and development in this area.
Author(s): G. Q. Maguire Jr
429 Pages
This book provides a collection of 15 excellent studies of Voice over IP (VoIP) technologies. This book introduces research strategies that address various issues with the aim of enhancing VoIP quality.
Author(s): Shigeru Kashihara
346 Pages
This note covers the following topics: protocol overview, components, H.225, RAS , Q.931, H 235V2 security, H 323 & firewalls, sccpskinny, RTP and RTCP,SIP, sample sip session, request methods, request headers, replies, SDP and SIP fire
Author(s): NA
112 Pages
Voice over IP Protocols and Standards (PDF 20P)
This paper first discusses the key issues that inhibit Voice over IP (VOIP) to be popular with the users. This document discuss the protocols and standards that exist today and are required to make the VOIP products from different vendors to interoperate. The main focus is on H.323 and SIP (Session Initiation Protocol), which are the signaling protocols. We also discuss some hardware standards for internet telephony.
Author(s): Rakesh Arora
20 Pages
