Fritz!Box - telephony logging

This post describes a simple (!) data logging system for those with a Fritz!Box that is also used for wired/DECT telephony.

Many Fritz!Box models have a build-in method to share the telephony data. The data can be obtained through a TCP port on the Fritz!Box. The data sharing port is (fixed to) port 1012. To enable/disable the sharing, dial the next with a phone that is connected to the Fritz!Box:

Enable data sharing:  #96*5*

Disable data sharing: #96*4*

To check if the data sharing is working, use Telnet:

C:\> telnet {IP address of Fritz!Box} 1012

 

You will see a black screen. Make a phone call to the Fritz!Box and you will see something like this:

 

26.12.22 14:37:00;RING;0;0610901234;+31123456091;SIP0;
26.12.22 14:37:01;DISCONNECT;0;0;
26.12.22 14:37:18;CALL;0;0;+31123456091;0610901234;SIP0;
26.12.22 14:37:25;CONNECT;0;0;0610901234;
26.12.22 14:37:34;DISCONNECT;0;8;

 

RING = incoming call

CALL = outgoing call 

CONNECT =  pick up of a phone connected to the Fritz!Box

DISCONNECT = hang up of a phone connected to the Fritz!Box

 

Now, to log data to a log file use this Powershell script:

<#

   

    Date: 26-Dec-2022

    Purpose: Read Fritz!Box' phone data

   

    TCP port: 1012

    Enable port : Dial #96*5*

    Disable port: Dial #96*4*

#>

$fritzBox  = "{Fritz!Box IP address}"

$fritzPort = 1012

$logFile   = "{path to}\Fritz!BoxPhoneData.log"

$now = get-date -Format s

write-output "$now;--- Start Fritz!Box telephony data logging..." | out-file $logFile -append

while ($true) {

    $tcpClient = new-Object System.Net.Sockets.TcpClient($fritzBox,$fritzPort)

    $tcpStream = $tcpClient.GetStream()

    $reader = New-Object System.IO.StreamReader($tcpStream)  

   

    while ($tcpClient.Connected) 

    {

 

        while ($tcpStream.DataAvailable) 

        {

                   

            $response = $reader.ReadLine()

            $now = get-date -Format s

            write-output "$now;$response" | out-file $logFile -append

            write-host "$now;$response"

           

        }

        #--- Poll port every 5s...

        Start-Sleep 5

    }

   

    #--- Recover from a connection loss, e.g. Fritz!Box reboot...

    Start-Sleep 60

}    

You may use a tool like NSSM to create a Windows Service. Then the script will run in the background and it will log all phone calls to the log file.