<ARTICLE> 5
<CIK>0000916310
<NAME>Protection One Alarm Monitoring Inc.
<MULTIPLIER> 1,000

                             
<PERIOD-TYPE>                   9-MOS
<FISCAL-YEAR-END>                          DEC-31-2000
<PERIOD-END>                               SEP-30-2000
<CASH>                                           1,162
<SECURITIES>                                         0
<RECEIVABLES>                                   66,135
<ALLOWANCES>                                    31,324
<INVENTORY>                                     10,861
<CURRENT-ASSETS>                               110,126
<PP&E>                                          88,832
<DEPRECIATION>                                  41,352
<TOTAL-ASSETS>                               2,026,539
<CURRENT-LIABILITIES>                          173,920
<BONDS>                                        593,307
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                         1,270
<OTHER-SE>                                   1,257,735
<TOTAL-LIABILITY-AND-EQUITY>                 2,026,539
<SALES>                                        335,577
<TOTAL-REVENUES>                               335,577
<CGS>                                          110,976
<TOTAL-COSTS>                                  110,976
<OTHER-EXPENSES>                                 (295)
<LOSS-PROVISION>                                12,943
<INTEREST-EXPENSE>                              46,917
<INCOME-PRETAX>                               (99,190)
<INCOME-TAX>                                    24,697
<INCOME-CONTINUING>                           (74,493)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                 49,273
<CHANGES>                                            0
<NET-INCOME>                                  (25,220)
<EPS-BASIC>                                     (0.20)
<EPS-DILUTED>                                   (0.20)