City to Investigate 911 Outages During Blackout By LUKAS I. ALPERT Associated Press Writer August 17, 2003, 3:37 PM EDT Problems with the system's telephone service provider caused disruptions of up to 14 minutes. "We've got to make sure that doesn't happen again," Mayor Michael Bloomberg said Sunday. [...] The disruptions were caused by the failure of a backup diesel generator at the Verizon Communications office that supplies power to the city's 911 headquarters in downtown Brooklyn, company spokesman John Bonomo said. [...] On Sunday, nine police precincts were still experiencing problems connecting to the department's main computer system, stemming from disruptions with their cable modem connections.