Quebec-based Exfo, a specialist in fibre optic testing and mobile network monitoring, says it has purchased a majority stake in Astellia, a similar company based in France.
Exfo has acquired 97.44 per cent of the capital and at least 95.07 per cent of Astellia's voting rights for $40.4-million.
Astellia works in the field of mobile network performance analysis solutions and subscriber experience.
Based in Rennes, France, Astellia reported sales of about $60-million in 2017 and has more than 120 customers worldwide.
"By joining our strengths and technologies, we are creating unique capabilities to help operators keep pace with a quickly changing industry and ever-increasing consumer expectations," said Exfo founder and executive chairman Germain Lamonde.
The announcement was made Wednesday at the World Mobile Congress in Barcelona, Spain.