Thursday's Tech Winners & Losers

Shares of Pacific Internet(PCNTF Quote) jumped 17% after MediaRing offered to buy the voice-over-Internet-protocol services company for $9.50 a share, a 15% increase from its earlier offer of $8.25 a share. "We are taking this step to demonstrate our commitment to our offer for PacNet," said MediaRing, an Asian VoIP provider, in a press release. "Given PacNet's share price performance in recent months and market uncertainty going forward, we believe our revised cash offer represents very good value for PacNet's shareholders." Pacific Internet previously rejected MediaRing's $8.25-a-share bid, calling the deal "inadequate and not in the best interests of the shareholders." MediaRing said its $9.50 a share offer is final. Pacific Internet shares were trading up $1.38 to $9.33.

Tekelec(TKLC Quote) rose 4% after the telecom-equipment company announced a restructuring plan that is projected to result in annual savings of about $8 million to $8.5 million. The restructuring plan will result in the loss of some 60 jobs, with the majority of the cuts taking place in the company's Switching Solutions Group, which is based in Plano, Texas. Tekelec expects to record a restructuring charge of about $3.4 million during the second quarter. "The action is principally the result of the company realigning its cost structure to better match its business opportunities and to complete the integration of past acquisitions," Tekelec said. Shares were trading at $12.22, up 52 cents.

Other technology movers included Microsoft(MSFT Quote), down 18 cents to $22.90; Cisco Systems(CSCO Quote), down 31 cents to $19.76; JDSU(JDSU Quote), down 3 cents to $2.60; Oracle(ORCL Quote), down 6 cents to $14.47; Intel(INTC Quote), down 8 cents to $18.32; Apple Computer(AAPL Quote), up 79 cents to $58.65; Qualcomm(QCOM Quote), down $2.16 to $42.04; Sirius Satellite Radio(SIRI Quote), unchanged at $4.21; and Sun Microsystems(SUNW Quote), down 7 cents to $4.25.