These graphs display data only related to PSAP Service Disruptions, as defined under the rules of the Colorado Public Utilities Commission, that have been closed with a final report and not withdrawn by the carrier. PSAP Service Disruptions are those that interrupt the delivery of 911 calls or location information from the aggregation point of the 911 system service provider to the demarcation with the Public Safety Answering Point (PSAP) or governing body.