CallMonitor

Version: 2.x | License: Freeware

Requirement: An AVM Fritz!Box is required. Other routers are not supported.

What is CallMonitor?

CallMonitor displays incoming and outgoing calls from your Fritz!Box on your PC with caller images and location information.

Features

FritzBox Call Monitor: Connection via port 1012
Caller Images: Local images for contacts
Location Detection: Automatic via area code
Call List: Display past calls
Notifications: Popup for incoming calls
Dialing: Dial directly from PC

System Requirements

Component	Requirement
Operating System	Windows 10/11 (64-bit)
Router	AVM Fritz!Box (any model)
Network	PC and Fritz!Box on same network
Port	1012 must be accessible
RAM	2 GB minimum
Storage	50 MB + call list
.NET	.NET 6.0 or higher

Enable Fritz!Box Call Monitor

1 Open Fritz!Box interface (fritz.box or 192.168.178.1)

2 Log in

3 Go to "Telephony" > "Own Telephone Numbers"

4 Scroll to "Call Monitor"

5 Check "Enable Call Monitor"

6 Click "Apply"

Important: The call monitor is disabled by default and must be explicitly enabled in the Fritz!Box.

Initial CallMonitor Setup

1 Start CallMonitor

2 Enter the IP address of your Fritz!Box (usually 192.168.178.1)

3 Port is already set to 1012

4 Click "Connect"

5 Connection status should change to "Connected"

Add Caller Images

1 Create a folder for caller images (e.g., C:\CallMonitor\Images)

2 In CallMonitor: Settings > Caller Images

3 Select the images folder

4 Images must have the following names:

[PhoneNumber].jpg - e.g., 03012345678.jpg
[PhoneNumber].png - e.g., 01761234567.png

5 Images are automatically displayed during calls

Location Detection via Area Code

CallMonitor automatically recognizes the location based on the area code:

Germany: All area codes included
Example: 030 = Berlin, 089 = Munich, 0221 = Cologne
Mobile numbers are recognized and marked accordingly
Special numbers (0180, 0900) are marked

The location database is stored locally and updated regularly.

Call List

CallMonitor saves all calls:

Incoming: Green icon, time, duration
Outgoing: Blue icon, time, duration
Missed: Red icon, time
Filter by date, number, name possible
Export as CSV possible

Dial from PC

1 Select a number from the call list or enter manually

2 Click "Dial" or phone icon

3 Your Fritz!Box-connected phone rings

4 Answer - the connection is established

Notifications

For incoming calls, a popup appears with:

Caller number and name (if in phonebook)
Caller image (if available)
Location (via area code)
Date and time
Ring duration

Settings under: Settings > Notifications

Troubleshooting

Problem	Solution
"Connection failed"	Check IP address. Is port 1012 enabled in Fritz!Box? Check firewall.
No calls displayed	Check call monitor in Fritz!Box. Is CallMonitor connected?
Caller image not displayed	Check filenames (exact number). JPG or PNG format. Check folder in settings.
Dialing not working	Requires a phone connected to Fritz!Box. Check CAPI port.
Wrong location detected	Mobile numbers have no area code. Update location database.
CallMonitor won't start	Check if port 1012 is already in use by another program. Check Task Manager.

Keyboard Shortcuts

Key	Function
Ctrl + C	Copy number
Ctrl + W	Dial
Ctrl + F	Search in call list
Del	Delete call from list
F5	Reconnect

Privacy

Call data is stored locally
No transmission to external servers
Location database is local
Caller images remain on your PC