==================================================================================================================== ==================================================================================================================== EXHIBIT 12 PACIFIC BELL COMPUTATION OF RATIOS OF EARNINGS TO FIXED CHARGES Dollars in Millions SIX MONTHS ENDED JUNE 30, YEAR ENDED DECEMBER 31, ------------------ --------------------------------------------------- 1997 1996 1996 1995 1994 1993 1992 --------- --------- --------------------------------------------------- Income (Loss) From Continuing Operations Before Income Taxes and Cumulative Effect of Accounting Changes $ (395) $ 1,054 $ 1,945 $ 1,538 $ 1,692 $ (39) $ 1,738 Add: Interest Expense 219 182 363 410 439 429 460 1/3 Rental Expense 30 23 46 28 40 37 35 --------- --------- -------- --------- -------- -------- --------- Adjusted Earnings $ (146) $ 1,259 $ 2,354 $ 1,976 $ 2,171 $ 427 $ 2,233 ========= ========= ======== ========= ======== ======== ========= Total Interest Charges $ 252 $ 201 $ 411 $ 410 $ 439 $ 429 $ 460 1/3 Rental Expense 30 23 46 28 40 37 35 --------- --------- -------- --------- -------- -------- --------- Adjusted Fixed Charges $ 282 $ 224 $ 457 $ 438 $ 479 $ 466 $ 495 ========= ========= ========= ========= ======== ======== ========= Ratio of Earnings to Fixed Charges (0.52) 5.62 5.15 4.51 4.53 0.92 4.51