Call Flow Tab
The Call Flow tab provides a visual representation of signaling activity and network interactions for a given analysis. It offers two complementary views to help you troubleshoot and validate behavior across network elements:
Sequence Diagram – Displays a time-ordered flow of messages between network nodes, helping you trace signaling paths step by step.
Topology Diagram – Shows a structural view of how nodes are connected, highlighting the relationships and traffic direction across the network.
Under this page, you will learn how to:
Understand the elements available in the Call Flow view
Apply filters to focus on specific messages or events
Access additional contextual information linked to the diagram
Identify messages associated with a Proxy Session Indicator
Access the Topology Diagram view
Available Elements in the Call Flow View
Below is an image highlighting the key elements within the Call Flow view. Each element is numbered and corresponds to a detailed description to help you quickly understand its purpose and functionality.
N. | Name | Description |
|---|---|---|
1 | Show Time Difference | Displays the time difference between request and response messages in the sequence diagram when selected. |
2 | Show Errors | Filters the view to show only the detected errors within the message sequence. |
3 | Show Message Causes | Highlights messages that contain a detected cause in the request or response, if available. Select the subflow message to view the cause in the Element Detail Information window. |
4 | Show Failure Indications | Displays failure indications detected in request messages, if present. |
5 | Advanced (filters) | Enables filtering by protocol, message type, or specific messages. Refer to the Filter your Diagram section for more details. |
6 | Pinned Attributes | Lets you save and reuse your preferred attributes within the packet viewer. |
7 | Link a Ticket | Allows you to attach a link to an external ticket for traceability or reference. |
8 | Procedure Dropdown | View the full diagram or filter by specific procedures. Check the Procedure Details section for the supported procedures' list. |
9 | Playback | Step through the session interactively, one message at a time. |
10 | View Sequence Diagram | Toggle to display the flow as a time-based sequence diagram. |
11 | View Topology Diagram | Toggle to display the flow as a network topology diagram. |
12 | Download Diagram | Export the diagram in either PNG or SVG formats. |
12 | Network Elements | Shows the list of network elements involved in the call flow, including their IP addresses and FQDNs (if available). |
14 | Sequence Area | Displays the message sequence. Use zoom controls to magnify or reduce the view. |
15 | Timestamp | Indicated the start time of each aligned message. |
16 | Frame Number | Shows the frame number corresponding to each aligned message. |
Filtering your Diagram
Advanced Filters
Use filters to customize the sequence view by protocol, message type, or specific messages.
To apply filters, open the Advanced dropdown menu in the Call Flow tab.
In the Advanced Filter, you can apply your preferences to customize the diagram view. The changes will be reflected automatically. You can filter by the following criteria:
Interfaces
Network Functions
Protocols
Message Types (Requests and Responses)
Specific Messages
The diagram will be blank if the selected messages are not in the flow.
Pro Tip: Click the Reset button to instantly clear all applied filters and return to the default view.
Filtering by Procedure
By default, the sequence diagram displays all procedures that occurred during the flow duration.
Use filters to narrow the view and focus on a specific procedure as needed.
To apply filters, open the Full Diagram Visualization dropdown menu in the Call Flow tab.
Accessing Additional Information
The key elements below the diagram offer additional context. Network Elements and Messages provide detailed attributes to help you analyze the flow more effectively.
Network Elements
Click the Info () icon to view a Network Element’s detailed information.
The element's name and description are displayed.
Click on the Close () icon to close the panel.
Pro tip: You can use your trackpad or mouse to navigate in your digaram instead of scrolling.
Messages
Click the message to view detailed information.
The message’s additional information will be displayed.
Click the Message Attributes button to jump to the frame number in the Flow Extractions tab.
Click on the Close () icon to close the panel.
Proxy Session Indicator
This icon appears next to messages in the sequence diagram that are part of a proxy session.
What It Means
The presence of this icon indicates that the message is associated with a proxy session, helping you quickly identify flows that were handled through a proxy.
Clicking the icon takes you directly to the corresponding proxy session in the Proxies tab, allowing you to explore full session details.
Click to learn more about the Proxies tab.
Use the Topology Diagram
The topology diagram chronologically displays the network domains and network messages detected in the PCAP. Use the diagram to pinpoint the precise source of issues at the network message level, isolate the root cause, and accelerate troubleshooting resolutions.
To use the Topology Diagram:
Select the Topology icon to view the Topology Diagram.
View the chain of network domains and elements.
The network domains found in the call flow are displayed in the top row of the Topology diagram.
The network elements are organized below their domains.Select the information icon to view detailed information.
Next: View the Protocol Analyzer