A county or multicounty area shall maintain an enhanced 9-1-1 system that: Uses the digits 9-1-1 as the published emergency telephone number for access to emergency services; Has public safety answering points that provide 24-hour public access and dispatch service; Provides transfer and referrals to related public safety services; Provides for staffing all public safety answering points with personnel trained as required by this chapter; Provides for equipping all public safety answering points with adequate access to TTY equipment to facilitate use by an individual with a speech or hearing disability; Provides access to services for an individual who does not speak or understand the English language; May provide access to local emergency management centers for all public safety answering points; Permits a county to designate a public safety answering point using cooperative arrangements acceptable to the participating agencies; Permits public safety answering points to transfer or relay emergency calls received requiring services outside of the jurisdiction of the system receiving the call; Maintains a current master street address guide and communicates updated information to parties responsible for an automatic number identification (ANI) and automatic location identification (ALI) system; Uses telephone equipment and services that provide: A visual or audible indication, or both, of an incoming call; The capability for the call taker to monitor a transferred call to ensure that the call is properly transferred; Annual telephone company monitoring of service to determine the grade of service and, if appropriate, to make recommendations to ensure that not more than one busy signal in every 100 incoming calls during an average busy hour is maintained; and Documentation of the date and time a 9-1-1 call is received; and Has a sufficient number of call takers and equipment to consistently answer incoming calls on a daily average of 10 seconds or less.