Trading in the shares of telecommunications equipment manufacturer Amper SA were suspended on the Madrid stock exchange on Friday, and the company later announced that two of its subsidiaries were suspending debt payments to relieve the financial strain on the parent. The two account for 15% of sales but 80% of group losses. Amper is currently 15% owned by Telefonica de Espana SA, 10% by engineer Indra SA, 18% by foreign investors. Late last month, as reported, Siemens AG’s Spanish subsidiary said it would be interested in buying a stake in Amper (CI No 2,285).