ASTM_F_1381_-_92_2003.pdf

Designation:F 1381 92(Reapproved 2003)Standard Guide forPlanning and Developing 9-1-1 Enhanced TelephoneSystems1This standard is issued under the fixed designation F 1381;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide recommends minimum performance require-ments for enhanced access to public safety services using theNorth American standard emergency telephone number,9-1-1.1.2 This guide provides assistance to states,counties,andlocal jurisdictions in the development of 9-1-1 enhancedsystems.1.3 This guide makes recommendations for planning andorganizational needs in the development of 9-1-1 enhancedsystems.1.4 This guide does not address access to public safetyresponse services through means other than use of the 9-1-1telephone number.1.5 This guide applies only to the use of the number 9-1-1to request a public safety response,from the point of initiationof the call through the point that the caller is connected to theresponsible agency,or essential information needed for dispo-sition of the call,or both,is received.1.6 The sections in this guide are arranged in the followingorder:SectionScope1Terminology2Significance and Use3Concept of Operation for 9-1-1 Telephone Systems49-1-1 Performance Factors4.19-1-1 Performance Requirements4.2Coordinating 9-1-1 Systems5State 9-1-1 Statutory Provisions69-1-1 Funding7Funding Alternatives7.1Funding considerations7.2Geographical Data Bases8Automatic Location Identification8.1Uniform Address Program8.2Selective Call Routing8.3Service Areas8.4Other Planning Concerns9Public Education9.1Personnel Training9.21.7 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Terminology2.1 Definitions:2.1.1 9-1-1,na three-digit telephone number to facilitatethe reporting of an incident or situation requiring response bya public safety agency.2.1.2 Poisson Distribution,na probability density func-tion that is often used as a mathematical model of the numberof outcomes obtained in a suitable interval of time and space.In 9-1-1 it is used to predict potential call blockage duringnormal busy periods.2.2 Definitions of Terms Specific to This Standard:2.2.1 abandoned call,na call placed to 9-1-1 in which thecaller disconnects before the call can be answered by the publicsafety answering point(PSAP)attendant.2.2.2 action agency,nthe public safety agency having alegal or consensual obligation to respond to a call for service.2.2.3 alternate routing,nthe capability of automaticallyrerouting 9-1-1 calls to a designated alternate location(s)if all9-1-1 trunks from a central office or to a primary PSAP arebusy or out of service.May also be activated upon request,orautomatically if detectable,when 9-1-1 equipment fails or thePSAP itself is disabled.2.2.4 answering position,nan appropriately equipped lo-cation within a PSAP that is used to receive incoming 9-1-1calls.2.2.5 audible signal,na sound that indicates an incoming9-1-1 call.2.2.6 automatic call distributor(ACD),n equipment thatdistributes incoming calls to available PSAP attendants in theorder the calls are received,or holds calls until an attendantbecomes available.2.2.7 automatic location identification(ALI),nthe auto-matic display at the PSAP of the callers telephone number,theaddress for the telephone and supplementary information.2.2.8 automatic number identification(ANI),nthe auto-matic display at the PSAP of the callers telephone number.1This guide is under the jurisdiction of ASTM Committee F30 on EmergencyMedical Services and is the direct responsibility of Subcommittee F30.04 onCommunications.Current edition approved March 10,2003.Published March 2003.Originallyapproved in 1992.Last previous edition approved in 1997 as F 1381 92(1997).1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.2.2.9 average busiest hour,nthe 1-h period during theweek statistically shown over time to be the hour in which themost emergency telephone calls are received.2.2.10 call detail logging,na means of establishing chro-nological and operational accountability for each 9-1-1 callprocessed,consisting minimally of the callers telephonenumber,the date and time the 9-1-1 telephone equipmentestablished initial connection(trunk seizure),the time the callwas answered,the time the call was transferred(if applicable),the time the call was disconnected,the trunk line used,and theidentity of the PSAP attendants position.Also known as ANIprintout.2.2.11 called party hold,nthe capability to maintaincontrol of an incoming 9