VoIPmonitor is open source network packet sniffer for SIP and RTP VoIP protocol running on linux or any posix unix. VoIPmonitor was designed to analyze quality of VoIP call based on network parameters - delay variation and packet loss according to ITU-T G.107 E-model which predicts quality on MOS scale. Calls with all relevant statistics are saved to MySQL or ODBC database. Optionaly each call can be saved to pcap file with either only SIP protocol or SIP/RTP/RTCP protocols.

VoIPmonitor can also decode speech and play it over the commercial WEB GUI or save it to disk as WAV. Supported codecs are G.711 alaw/ulaw and commercial plugins supports G.729a/G.723/iLBC/Speex/GSM. VoIPmonitor uses jitterbuffer simulator to keep both direction of call synchronized.

For who is VoIPmonitor

• monitor and troubleshoot quality of VoIP calls and keep informed by alets
• archive all SIP or/and RTP signalization
• track and archive all calls and save CDR records to database
• record and listen to calls
• for billing purpose

How VoIPmonitor scales

VoIPmonitor from version 4 is able to handle thousand of simultaneouse calls. It uses two threads - one reading packets from ethernet and buffering it to queue. Second thread is reading from this queue and process packets. This method allows to cover CPU or I/O peaks.

How to get VoIPmonitor sniffer

VoIPmonitor sniffer can be downloaded as a source code or precompiled binaries for 32 and 64 bit platforms. Checkout download section. Sniffer is also available in SVN repository which contains the latest bits.

svn co https://voipmonitor.svn.sourceforge.net/svnroot/voipmonitor voipmonitor-svn-tree

Features

• Comprehensive filters to find specific CDRs based on IP, telephone numbers, qualitative parameters (loss/delay/MOS)
• Nice graph showing call quality
• Download PCAP, WAV and online listening to calls via built-in flash player
• manage voipmonitor sniffer built-in filters
• WEB and Email Report generator
• Alert generator based on variouse criteria
• Grouping feature based on IP addresses, last SIP response codes, codecs
• Email and IP groups for easy filtering or alerting
• Live calls overview with national/international filter
• User management allowing define users which can see only part of calls based on IP or telephone numbers.
• Listen to call directly from WEB GUI
• Download PCAP or WAV file
• Detailed SIP protocol overview with detail SIP packet (wireshark style)
  (this feature is very popular for network operators which can check the SIP protocol without needing to download PCAP file and open it in wireshark)
• Built-in traceroute tool