Tutorials

Architecture          Voice Convergence

Next Generation VoIP Architecture - MSForum.org

VoIP Reference Architecture - IPCC

VoIP

How VoIP Works - How Stuff Works

Understanding VoIP - Packetizer

VoIP 101 - Juniper Networks

VoIP Overview - Cisco

VoIP Overview - Vovida.org

SIP, H.323 and MGCP/Megaco - SIP Center

VoIP over WLAN - IEC

Practical VoIP - Lecture Notes of G.Q. Maguire Jr

Understanding VoIP Protocols - Cisco

Understanding Delay in Packet Voice Networks - Cisco

Building Residential VoIP Gateways - Analog Zone  Part 2, 3, 4, 5

SIP                         SIP Architecture

SIP Cookbook - sip.edu

SIP - Cisco IP Journal

A sip of SIP - IBM

SIP Protocol Overview - Radvision

What Is SIP - SIP Center

SIP Tutorial - iptel.org

Programming SIP - SIP Center

SIP - Lecture slides of Henning Schulzrinne

SIP - Network Sorcery

H.323                     H.323 Architecture

A Primer on the H.323 Series Standard - Packetizer.com

H.323 Primer - IEC

H.323 Protocols Suite - protocols.com

SIP and H.323 Integration - Cisco

Related Protocols

ENUM - IP Journal Cisco

TRIP Tutorial - Packetizer

Security

Security in SIP-Based Networks - Cisco

Session Border Controllers - Acme Packet

Security Considerations for VoIP Systems - NIST

Telephony

Telephony 101- Privateline.com

Understanding Telephony Basics- Cisco

Telephony Basics - Thomas Naugler

PSTN Presentation - C7.com

FXS and FXO Explained - Patton.com

SS7

Signaling System 7 (SS7) - IEC

SS7 - Performance Technologies

SS7 Tutorial - SS8 Networks

SS7/IP Interworking Tutorial - Performance Technologies

SS7 over IP Signaling Transport & SCTP - IEC

VoIP Whitepapers

VoIP Whitepapers - Radvision

Whitepaper Library - SIP Center

Standards

IETF             Related Charters     sip  sipping  simple  sigtran  iptel

                                         megaco  avt  mmusic  midcom  enum

ITU-T           ITU H Series Documents

Consortiums

SIP Forum

H.323 Forum

SIP Connect

PacketCable

MSF - Multi Service Forum

IPCC - International Packet Communications Consortium

VOIPSA - Voice over IP Security Alliance

IMTC - International Multimedia Telecommunications Consortium

RFCs

RFC 3261 - SIP: Session Initiation Protocol

RFC 3435 - MGCP: Media Gateway Control Protocol

RFC 3525 - The Megaco/H.248 Gateway Control Protocol

RFC 3372 - SIP-T: SIP for Telephones

RFC 3550 - RTP: A Transport Protocol for Real-Time Applications

RFC 3550 - RTCP: RTP Control Protocol

RFC 3761 - ENUM: The E.164 to Uniform Resource Identifiers (URI)

RFC 3219 - TRIP: Telephony Routing over IP

RFC 2960 - SCTP: Stream Control Transmission Protocol

RFC 4566 - SDP: Session Description Protocol

RFC 2974 - SAP: Session Announcement Protocol

RFC 2326 - RTSP: Real Time Streaming Protocol                   Draft 14

RFC 3711 - Secure RTP

RFC 2719 - Framework Architecture for Signaling Transport

RFC 4504 - SIP Telephony Device Requirements and Configuration

Portals

The SIP Center

VOIP Wiki - www.voip-info.org

SIP Technical Portal - Tech Invite

pulver.com - "Voice" of IP Communications

iptel.org - IP Telephony Site

TELEPHONY Magazine

VoIP Magazine Online

TMCnet - VoIP News and Internet Telephony

Implementations

Asterisk | The Open Source PBX

OpenPBX.org

SIPfoundry

The GNU oSIP library

The eXtended osip library

Vovida.org

NIST SIP

OpenH323 Project

OpenSS7 Project

Flextronics (Commercial)

Radvision (Commercial)

M5T (Commercial)

Data Connection (Commercial)

Trillium (Commercial)

Soft Phones

Windows Messenger - Microsoft

SIP Multimedia PC Client - Nortel

Xlite (xten)

OpenWengo

Speak Freely

Linphone (Linux)

Twinkle (Linux)

Cisco

SIP - Technology Support

H.323 - Technology Support

Gateway Protocols  MGCP   Skinny Call Control Protocol (SCCP)

Quality of Service for VoIP

Cisco IOS Voice Configuration Library

Telephony Signaling              SS7

 

Voice over Frame Relay (VOFR)

Voice over ATM (VoATM)

 

Testing

Spirent

Brix Networks

Empirix

RADCOM

UNH Voice over X - Test Suites

TestYourVoIP.com

VoIPTroubleshooter.com

How To Debug and Troubleshoot VOIP - voip-info.org

Links

SIP Resources - Henning Schulzrinne

Packetizer.com VoIP   SIP   H.248   H.323   MGCP

Voice over IP and IP Telephony - Raj Jain

Voice over IP Reference- Protocols.com

VOIP Wiki - www.voip-info.org

Books

1. Carrier Grade Voice Over IP by Daniel Collins

2. SIP Demystified by Gonzalo Camarillo

3. Internet Communications Using SIP by Henry Sinnreich, Alan B. Johnston

4. RTP: Audio and Video for the Internet by Colin Perkins

5. IP Telephony with H.323 by V. Kumar et al.

6. Integrating Voice and Data Networks by Scott Keagy

7. Troubleshooting Cisco IP Telephony by Paul Giralt, Addis Hallmark, Anne Smith

8. Taking Charge of Your VoIP Project by John Q. Walker, Jeffrey T. Hicks

Maintained by Anil Edathara

Last Modified: November 17, 2007