U.S. telecoms operator AT&T and Finnish network equipment maker Nokia have signed a multi-year expansion agreement to upgrade AT&T's voice carriage and 5G network automation in the U.S., the Finnish company said on Tuesday.

AT&T and Nokia agreed a multi-year contract extension for the Finnish vendor to support the operator in evolving its voice core offering.

As part of this upgrade, AT&T will add Voice over New Radio (VoNR) and move its Nokia IMS Voice Core to a cloud-based system. This will help the company roll out new services faster, cut costs, and improve automation.

Nokia (NOK) and AT&T (T) signed a multi-year expansion agreement to upgrade the American company's voice carriage and 5G network automation in the U.S.