SIP Workbench 1.0.0 VoIP Analyzer

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SIP Workbench is a graphical SIP, RTP, STUN, and TURN protocol analyzer and viewer designed to help illustrate and correlate VoIP and IM network interactions. SIP Workbench is a versatile tool designed for protocol developers, system integrators, and end-users to use to visualize, diagnose, and debug complex multi-protocol interactions.
SIP Workbench reads Ethereal/Wiresharp libpcap files and can perform live captures itself. Additionally, it can export SIP, RTP, and STUN information in text-based ladder diagram.

Key Features

Graphical display of complex interactions
Correlates SIP messaging
Filters large data sets
Decodes STUN and TURN packets
Summaries media
Operates directly from network captures
Saves time
Users can quickly review packet interactions, filter on a particular flow, and identify retransmissions, timing inconsistencies, failed requests, dropped responses, and routing issues. These features allow for quicker diagnosis and resolution of problems.
Facilitates communications
While a troubleshooting a problem, users can export ASCII representations of an interaction, annotate it, and share it with a vendor, system administrator, or developer. Users can export an entire packet capture or a particular flow or the contents of a single message.
Highlights problems
SIP Workbench includes visual indicators representing negative responses, missing responses, media start events, and timing characteristics. Different messages and message types are color coded to highlight and separate potential problems from expected interactions.
Learning tool
Those unfamiliar with SIP, STUN, TURN and RTP benefit from SIP Workbench’s intuitive graphical interface that allows users to visualize interactions and compare message flows. Sample captures are also included.

Visual Display

SIP Workbench displays SIP, STUN, TURN and media start events in a color-coded ladder diagram. The diagram identifies the source and target IP addresses and ports, user-agent information, transport types (UDP or TCP), and summary information for the message. SIP markers include the method, response code/text, and sequence numbers; audio markers include the payload type; and STUN/TURN markers include the method type and mapped IP or relay addresses.
When selecting a marker, the user is presented with transactional and session markers to help identify related messages. Time duration is provided for the session.


SIP Workbench maintains the relationship of SIP, STUN/TURN, and audio messages in the presentation of data. This feature allows users to ignore and filter uninteresting messages and and the decoded contents of SIP, STUN, and TURN messages.

Network Capture

Users can open libPCAP network captures created by tcpdump and WireShark. SIP Workbench can also capture packets directly for viewing.

UI Customization

SIP Workbench allows users to customize both how and which data are presented. Users can enable/disable all of the visual correlation features and modify the color coding used to display message categories (i.e., request, provisional response, error response, final response, error response, media markers, and related messages).


Users can filter by a specific SIP method, call-id, and to/from address. From a call-id, SIP Workbench enables further filtering by branch and individual transaction.
A message selection window pane assists data filtering by providing a list of all messages available in the diagram and provides the ability to filter on SIP, STUN/TURN, and media categories.


Any marker can be added to a bookmark list for quick access. These bookmarked markers display the time relative to other bookmarked markers.

Export and Printing

SIP Workbench provides the ability to print SIP diagrams and export diagrams to a text file. Text exports include an ASCII ladder diagram along with message details.


SIP Workbench provides summary information for audio and video streams. Users can review jitter and bandwidth graphs for each media stream and can extra media with or without RTP headers.
RTCP reports are presented in a format that allows users to review information from sender reports, receiver reports, in addition to session description information.

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