NASK maintains close relations with operators from other countries and is a partner of major international telecommunication operator BT Infonet. This cooperation enables NASK to offer Polish customers comprehensive services with a global reach.

BT Infonet offers integrated solutions optimizing the complex relationship between enterprise applications and the global network. It operates in 173 countries over the world. Since 1999, Infonet services in Poland have been provided by NASK.

The BT Infonet product portfolio includes: IVS, Dedicated Internet Access, DialXpress Office, DialXpress Professional, AC VPN and exclusive services: BT Diamond IP, BT Conferencing, IP Voice VPN.