Active calls

Category:GUI manual

This page describes the Active Calls view, which provides real-time monitoring of ongoing calls in the VoIPmonitor GUI.

Overview

The Active Calls view displays current calls in real time and allows you to listen to G.711 calls live (requires sniffer version 7 or newer). The view refreshes automatically according to the configured refresh interval (default: 2 seconds).

Communication with Sniffer

Live call data is fetched from the VoIPmonitor sniffer instance through the manager TCP port 5029. If calls are not displayed, verify that the web server can reach this port:

telnet localhost 5029

Direct URL Access

You can open the Active Calls view directly using this URL format:

http://your-server/admin.php?activecalls=1

Filtering Calls

The filter box adapts to the type of input provided. Calls can be filtered by:

National or international (via combo box)
Sensor
IP address or IP prefix
Phone number or prefix
Call-ID

Filter Syntax Examples

Input	Description
`192.168.%`	Filters calls with source or destination IP starting with 192.168.x.x
`00`	Filters calls where the number starts with 00
`abc123`	Searches for exact Call-ID match
`%abc123%`	Searches for Call-ID containing "abc123" (substring match)

Note: By default, Call-ID search matches the full Call-ID string. To search for a substring, add the % wildcard character to the start and/or end of the search string.

Bottom Graphs

The bottom section of the Active Calls view displays graphs showing the top callers grouped by:

Caller IP address
Called IP address

Customizing Column Visibility

The Active Calls view allows you to show or hide columns based on your preferences. This is useful when:

You want to reduce visual clutter and focus on specific information
Certain columns contain data that is causing performance issues (e.g., parsing errors in the Proxy column)
Your display has limited screen space

To hide or show columns:

Locate the column header area at the top of the table
Click on the column visibility icon (typically a column or grid icon) or look for a "Show columns" dropdown menu
Uncheck columns you want to hide, check columns you want to show
The view will update immediately with your selection

Your column visibility preferences are stored in the GUI configuration (saved in the MySQL custom_config table) and persist across sessions.

Troubleshooting Performance Issues

If the Active Calls view becomes unresponsive or slow, particularly when displaying certain columns like "Proxy":

Temporary workaround: Hide the problematic column using the column visibility method above.

If the GUI is completely unresponsive

Connect directly to the GUI database
Check the custom_config table for column visibility settings
Clear or modify the relevant configuration entries
Contact support with SSH access to the GUI host for investigation

Information to provide for support

A SIP PCAP dump of a problematic call (to identify data causing parsing errors)
A mysqldump of the voipmonitor.custom_config table (to review current column configuration)

AI Summary for RAG

Summary: Active Calls provides real-time monitoring of ongoing VoIP calls with live listening capability for G.711 codec. Calls are fetched via manager port 5029 and can be filtered by IP, number, sensor, or Call-ID. Column visibility can be customized and settings persist in the database.

Keywords: active calls, real-time monitoring, live calls, manager port 5029, call filter, column visibility, custom_config, G.711 listening

Key Questions:

How do I view active/live calls in VoIPmonitor?
Why are active calls not showing in the GUI?
How do I filter calls by IP address or phone number?
How do I hide or show columns in the Active Calls view?
What port is used for fetching live call data?