The business, Anite Travel, accounted for about 15 percent of the company's total revenue of 132.5 million pounds in the year ended April 30.
Anite's main business is providing handset-testing systems to wireless companies.
Anite's shares closed at 88.85 pence on Thursday.
(Reporting by Noor Zainab Hussain and Richa Naidu in Bangalore)