Network test specialist EXFO has signed an agreement to acquire Yenista Optics for an undisclosed sum. The deal is subject to a number of conditions to be completed before closing.

Yenista Optics, a privately held company based in Lannion, France, supplies advanced optical test equipment for the R&D and manufacturing markets. Its product portfolio includes benchtop optical spectrum analysers, tunable lasers, tunable filters and passive optical component test systems for network equipment manufacturers and optical component vendors.

Scotland-based blown fibre specialist Emtelle has acquired German duct manufacturer Moore GmbH. The acquisition is part of a €30 million investment by Emtelle to expand its overall manufacturing capacity and presence in Europe.

Network test specialist EXFO hopes to expand its service assurance activities with the eventual acquisition of French mobile analytics firm Astellia. The pair have signed agreements for EXFO to acquire a 33.1 per cent equity stake in Astellia, worth €8.6 million, with plans to acquire the remaining equity.

Privately owned Calient Technologies has been acquired by Suzhou Chunxing Precision Mechanical Co., Ltd., who will buy a controlling stake in the company and provide manufacturing services to help it expand.

Founded in 2001, Chunxing is a publicly traded Chinese manufacturer of precision metal alloy and plastic structures for the automotive, consumer electronics, industrial, and telecom market segments.

The optical circuit switch developer will continue to operate from its Goleta, California, headquarters under the Calient brand.  

Test instrumentation specialist Viavi Solutions has snapped up Trilithic, a provider of broadband test equipment, for an undisclosed sum.

A privately held company based in Indianapolis, Trilithic has products in two main areas: broadband instruments for installation and troubleshooting inside the home, and emergency alert systems that allow service providers to transmit public alerts and warnings across any kind of network. The company is profitable with revenues in the mid $20-million range, according to Viavi.