Security updates

Security update for Styra Porttelefonkort 4400.

We recommend that all Styra Porttelefonkort 4400 boards with firmware version A1 or earlier should be upgraded to version A2. Styra Porttelefonkort 4400 boards supplied after November 2016 are already equipped with the updated firmware. Aptus has issued a security update for earlier versions.

For further information and queries, please contact Peter Johannesson, Product Manager on +46 (0)31 689736 or

Aptus extends a big thank you to Patrick Mattsson, Knowit Secure AB for providing assistance and information.


Log in and download Styra Porttelefonkort 4400 product information here.

Download update file here.