X0202 4 2008-05-16 0000790705 TEKELEC TKLC 0001201412 PRABHU KRISH A C/O TEKELEC 5200 PARAMOUNT PARKWAY MORRISVILLE NC 27560 1 0 0 0 Common Stock 0 D Restricted Stock Units 2008-05-16 4 A 0 8000 0 A Common Stock 8000 8000 D Restricted Stock Units 2008-05-16 4 A 0 10000 0 A Common Stock 10000 10000 D Restricted Stock Units ("RSUs") convert to Tekelec Common Stock on a one-for-one basis. Each RSU represents the right to receive, upon vesting, one share of Tekelec Common Stock. The RSUs will vest (and shares represented thereby will be issued) in full one year after the grant date. Each RSU represents the right to receive, upon vesting, one share of Tekelec Common Stock. The RSUs will vest (and shares represented thereby will be issued) in 3 equal annual installments commencing on May 16, 2009. Krish A. Prabhu 2008-05-16