Alcatel-Lucent (NYSE: ALU), CSR plc (London: CSR), Samsung Corp. and Agilent Technologies Inc. (NYSE: A) lead the way in today's news dash.

Alcatel-Lucent's share price sunk by 15 percent to below €1 Tuesday morning on the Paris stock exchange after the company announced it would no longer meet its full-year profit-margin guidance. AlcaLu is now valued at €2.25 billion (US$2.77 billion). (See AlcaLu Revises Outlook and AlcaLu Issues Full-Year Profit Warning.)

Cambridge, U.K.-based CSR is selling its Handset Operations, which employs 310 staff, to Samsung for $310 million, the company announced in a regulatory update.

Spanish test systems vendor AT4 is being acquired by Agilent for an undisclosed sum. The acquisition, due to close in August, will give Agilent a broader range of LTE test tools. (See Agilent Buying AT4's Test, AT4 Provides LTE Pre-Testing Services and AT4 Wireless Tests TD-LTE.)

After failing to sell off its E-Plus Service GmbH & Co. KG German mobile subsidiary to help ward off the advances of Carlos Slim's América Móvil S.A. de C.V. , KPN Telecom NV (NYSE: KPN) has asked UBS Investment Bank to run the sale of thousands of E-Plus cell towers, reports Reuters. (See Euronews: Slim's Stealthy Expansion , Euronews: Slim Makes His Move on KPN and Slim's Dutch Drama .)

More news from Cambridge: Amino Technologies plc (London: AMO), the IPTV/OTT set-top box vendor, has moved back into the black, recording an operating profit of £0.2 million ($0.3 million) in its first-half results. It has also teamed up with content delivery specialist Intracom Telecom to win an IPTV contract with an unnamed but "major" operator in South Eastern Europe. (See Amino Reports H1 Profit of £0.2M.)

Details of Telefónica SA (NYSE: TEF) planned IPO of its German unit, Telefónica O2 Germany GmbH & Co. OHG , are emerging, with Bloomberg reporting that it is set to float a 20 percent stake in the German operator. Telefónica, which is seeking to cut its €57 billion ($70 billion) debt, is hoping to raise around €1.5 billion ($1.8 billion) from the IPO. (See Telefónica Plans Regional IPOs.)

Türk Telekomunikasyon A.S. has reason to be delighted with its second-quarter results: Group net profits increased by 24 percent year-on-year to 630 million Turkish Lira ($348 million) as investments in its fiber and 3G networks began to pay off. (See Turk Telecom Q2 Profit Hits TL630M.)

— Paul Rainford, Assistant Editor, Europe, Light Reading