VoIP Analysis

Analysis of VoIP

VoIP software

• Asterisk - A free PBX-system
• Trixbox - A Linux-distro specially configured for Asterisk
  • Trixbox 1.2.3 - Older version
  • List of IP's of our trixboxes

• Used software - Full list of the software we used.
  • X-Lite - Free SIP soft-phone

• List of Asterisk PBX distributions

Asterisk Configuration

• Dialplan Basics - The dialplan defines how Asterisk handles inbound and outbound calls.
  • Pattern-matching syntax - Patterns used to match a dialed number, for routing purposes in a dialplan.
• Videoconferencing - Configuration to make a videocall
• Screenshots VoIPBuster-config - Screenshots describing the configuration of VoIPBuster in Asterisk.
• DUNDi configuration - How to setup your PBX to participate in a DUNDi cloud.
• Conference calls - MeetMe simple conference rooms for Asterisk.
• Dimensioning Asterisk PBX - Dimensioning PBX-server.
• H323 configuration - How to setup your PBX to handle H.323 clients

VoIP Services

• VoIPBuster - A provider that can connect VoIP-calls to the PSTN.
• PSGw - Personal Skype to SIP and H.323 gateway.

VoIP-test sites

To test the quality or your VoIP connection you can use some web tools that give you some information

• To test your VoIP quality and the MOS (Mean Opinion Score, from 1 to 5) for some places around the world
• To test if you have any problem in your routers/firewalls that do not let pass the VoIP communications.
• To know how many VoIP calls we can do simultaneously.

For comparison, see the VoIP-quality site testresults.

VoIP Protocols

• IAX2 - Inter-Asterisk eXchange protocol
• DUNDi - Distributed Universal Number Discovery
• H323
• SIP vs IAX
• SIP vs H323

Conference calls

• Videoswitch support for MeetMe - Very basic support for redirecting video within a MeetMe conference.
• app_conference - app_conference is a channel-independent conference application.

Conference call related links.

Analysis

Networking

• Wireshark - Successor of Ethereal
• Ethereal - Network traffic analyser
  • Ethereal/Wireshark Analysis of VoIP traffic
  • DUNDi network traffic - traffic analysis of DUNDi traffic.
    • Asterisk DUNDi debug - Analysis of DUNDi traffic with Asterisk's debug.
• Bandwidth estimates
  • SIPp - test tool / traffic generator for the SIP protocol
• Controlling Bandwidth

Compression

• Audio Codecs - Coding/Decoding of audio streams
• Video Codecs - Coding/Decoding of video streams

Misc

• Documents - Collected documents
• Links - Various links with related info.
• DIY - Information on how to setup a cheap BPX yourself.
• Glossary
• Getting started with this Wiki.

THALES

• THALES comments - THALES comments