Exhibit 12.1 EXHIBIT 12.1 BTI TELECOM CORP. COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES (DOLLARS IN THOUSANDS) YEAR ENDED DECEMBER 31, 1995 1996 1997 1998 1999 ---- ---- ---- ---- ---- Income (loss) before taxes.................................. $ 371 $2,606 $(10,639) $(38,233) $(44,726) Less interest capitalized to inventories during the period.......................................... -- -- -- -- -- Adjusted income (loss) before taxes......................... 371 2,606 (10,639) (38,233) (44,726) Fixed Charges: Other interest expense....................... 1,297 1,695 8,805 25,430 28,531 Amortization of financing costs............................. 25 99 421 1,469 1,292 Rental expense(1)........................................... 947 1,305 611 761 969 Total fixed charges......................................... 2,269 3,099 9,837 27,660 30,792 Earnings.................................................... 2,640 5,705 (802) (10,573) (13,934) Ratio (shortfall) of earnings to fixed charges.............. 1.2x 1.8x -- -- --