Telekom customers using the old Fritzbox firmware cannot make calls

Telekom customers using the old Fritzbox firmware cannot make calls

An update in the Telekom network means that the Fritz boxes with the old firmware are no longer working properly. So customers should take necessary action.

Many Telekom customers use Fritzbox as a router. However, you should definitely check the installed firmware now. Because if it is an old version, soon Fritzbox will not be used properly. Among other things, telephony over the fixed network will not be possible from tomorrow. But why is this and what can Telekom customers do? TECHBOOK demonstrates.

The update in the Telekom network affects the functionality of the old Fritz boxes

Deutsche Telekom will update its network on March 15 to improve security standards, among other things. In Fritz! OS 7.25, AVM still uses Real Time Transfer Protocol (RTP) for IP-based telephony. Here, the media stream is transmitted without encryption, which is not allowed by Telekom security standards. The result: customers whose Fritzboxes work with Fritz! OS 7.25 They will no longer be able to make calls in Telekom’s fixed network from March 15th. However, internet usage is not affected and is still possible without restrictions.

According to your carrier, the problem only affects the said firmware. So the owners of Fritzbox have two options to respond to the update on the network. You can either update your Fritzbox to version 7.29 or – if the current software is not available – downgrade to a previous version of Fritz! OS 7.25. You can find a list of Fritz’s releases! Previous OS for various Fritz boxes here. However, this step is not really recommended, as it means that many innovations and system improvements will disappear from the Fritz boxes that AVM has put out for better playback.

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Read also: Fix the most common WLAN issues with Fritzbox

What are Fritz cans affected?

AVM Fritz released! OS 7.29 in November 2021. Since then, many Fritz boxes have received the update. However, there are still a few models for which the Fritz OS is not available! These are basically old Fritz boxes like the 7390, 7360, or Fritz box 7272. However, these routers usually run an older version of firmware anyway, making downgrading unnecessary.

Thus, the limitations caused by the Telekom network update will be mainly noticed by customers who have not activated automatic updates on their router and therefore may not have installed the Fritz version! current OS. It is therefore advisable to check the firmware version on the Fritzbox interface. go to her Log in with your data. The firmware currently installed on Fritzbox is shown on the start page at the top right. You can also search for a newer version under “System” and “Update” and download and install it there.


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